/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/list-properties/splice-1.i


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


This is Ultimate 0.2.0-b8ad66e
[2020-10-23 20:33:23,564 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-10-23 20:33:23,567 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-10-23 20:33:23,601 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-10-23 20:33:23,602 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-10-23 20:33:23,603 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-10-23 20:33:23,605 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-10-23 20:33:23,607 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-10-23 20:33:23,610 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-10-23 20:33:23,611 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2020-10-23 20:33:23,614 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-10-23 20:33:23,614 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-10-23 20:33:23,615 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-10-23 20:33:23,617 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-10-23 20:33:23,618 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-10-23 20:33:23,619 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-10-23 20:33:23,620 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-10-23 20:33:23,636 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-10-23 20:33:23,639 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-10-23 20:33:23,641 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-10-23 20:33:23,642 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-10-23 20:33:23,643 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-10-23 20:33:23,644 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-10-23 20:33:23,647 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-10-23 20:33:23,648 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-10-23 20:33:23,648 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-10-23 20:33:23,650 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
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[2020-10-23 20:33:23,651 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-10-23 20:33:23,651 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2020-10-23 20:33:23,655 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-10-23 20:33:23,656 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2020-10-23 20:33:23,657 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-10-23 20:33:23,659 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-10-23 20:33:23,660 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf
[2020-10-23 20:33:23,673 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-10-23 20:33:23,674 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-10-23 20:33:23,675 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-10-23 20:33:23,676 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-10-23 20:33:23,676 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-10-23 20:33:23,676 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-10-23 20:33:23,676 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-10-23 20:33:23,677 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-10-23 20:33:23,677 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-10-23 20:33:23,677 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-10-23 20:33:23,677 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-10-23 20:33:23,678 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-10-23 20:33:23,678 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-10-23 20:33:23,678 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-10-23 20:33:23,678 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-10-23 20:33:23,679 INFO  L138        SettingsManager]:  * Size of a code block=SingleStatement
[2020-10-23 20:33:23,679 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-10-23 20:33:23,679 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-10-23 20:33:23,679 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-10-23 20:33:23,680 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-10-23 20:33:23,680 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2020-10-23 20:33:23,680 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-10-23 20:33:23,680 INFO  L138        SettingsManager]:  * Use separate solver for trace checks=false
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2020-10-23 20:33:24,094 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-10-23 20:33:24,122 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-10-23 20:33:24,125 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-10-23 20:33:24,126 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-10-23 20:33:24,127 INFO  L275        PluginConnector]: CDTParser initialized
[2020-10-23 20:33:24,128 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/splice-1.i
[2020-10-23 20:33:24,205 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3850a9c5d/d30212355de84dc19c58d99f14a3ed5f/FLAG9ec8ecace
[2020-10-23 20:33:24,903 INFO  L306              CDTParser]: Found 1 translation units.
[2020-10-23 20:33:24,904 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/splice-1.i
[2020-10-23 20:33:24,917 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3850a9c5d/d30212355de84dc19c58d99f14a3ed5f/FLAG9ec8ecace
[2020-10-23 20:33:25,202 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3850a9c5d/d30212355de84dc19c58d99f14a3ed5f
[2020-10-23 20:33:25,211 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-10-23 20:33:25,219 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-10-23 20:33:25,221 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-10-23 20:33:25,221 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-10-23 20:33:25,225 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-10-23 20:33:25,226 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:33:25" (1/1) ...
[2020-10-23 20:33:25,229 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f8121ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:33:25, skipping insertion in model container
[2020-10-23 20:33:25,230 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:33:25" (1/1) ...
[2020-10-23 20:33:25,238 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-10-23 20:33:25,273 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-10-23 20:33:25,569 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-10-23 20:33:25,579 INFO  L203         MainTranslator]: Completed pre-run
[2020-10-23 20:33:25,633 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-10-23 20:33:25,701 INFO  L208         MainTranslator]: Completed translation
[2020-10-23 20:33:25,702 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:33:25 WrapperNode
[2020-10-23 20:33:25,702 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-10-23 20:33:25,704 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-10-23 20:33:25,704 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-10-23 20:33:25,704 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-10-23 20:33:25,717 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:33:25" (1/1) ...
[2020-10-23 20:33:25,717 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:33:25" (1/1) ...
[2020-10-23 20:33:25,733 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:33:25" (1/1) ...
[2020-10-23 20:33:25,733 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:33:25" (1/1) ...
[2020-10-23 20:33:25,755 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:33:25" (1/1) ...
[2020-10-23 20:33:25,761 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:33:25" (1/1) ...
[2020-10-23 20:33:25,765 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:33:25" (1/1) ...
[2020-10-23 20:33:25,772 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-10-23 20:33:25,773 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-10-23 20:33:25,773 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-10-23 20:33:25,773 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-10-23 20:33:25,774 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:33:25" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-10-23 20:33:25,884 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-10-23 20:33:25,884 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-10-23 20:33:25,884 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2020-10-23 20:33:25,884 INFO  L138     BoogieDeclarations]: Found implementation of procedure __bswap_32
[2020-10-23 20:33:25,885 INFO  L138     BoogieDeclarations]: Found implementation of procedure __bswap_64
[2020-10-23 20:33:25,885 INFO  L138     BoogieDeclarations]: Found implementation of procedure __uint16_identity
[2020-10-23 20:33:25,885 INFO  L138     BoogieDeclarations]: Found implementation of procedure __uint32_identity
[2020-10-23 20:33:25,885 INFO  L138     BoogieDeclarations]: Found implementation of procedure __uint64_identity
[2020-10-23 20:33:25,885 INFO  L138     BoogieDeclarations]: Found implementation of procedure myexit
[2020-10-23 20:33:25,886 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-10-23 20:33:25,886 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-10-23 20:33:25,886 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2020-10-23 20:33:25,886 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_perror_fail
[2020-10-23 20:33:25,886 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert
[2020-10-23 20:33:25,886 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2020-10-23 20:33:25,887 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-10-23 20:33:25,887 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-10-23 20:33:25,887 INFO  L130     BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max
[2020-10-23 20:33:25,887 INFO  L130     BoogieDeclarations]: Found specification of procedure atof
[2020-10-23 20:33:25,887 INFO  L130     BoogieDeclarations]: Found specification of procedure atoi
[2020-10-23 20:33:25,888 INFO  L130     BoogieDeclarations]: Found specification of procedure atol
[2020-10-23 20:33:25,888 INFO  L130     BoogieDeclarations]: Found specification of procedure atoll
[2020-10-23 20:33:25,888 INFO  L130     BoogieDeclarations]: Found specification of procedure strtod
[2020-10-23 20:33:25,888 INFO  L130     BoogieDeclarations]: Found specification of procedure strtof
[2020-10-23 20:33:25,888 INFO  L130     BoogieDeclarations]: Found specification of procedure strtold
[2020-10-23 20:33:25,888 INFO  L130     BoogieDeclarations]: Found specification of procedure strtol
[2020-10-23 20:33:25,889 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoul
[2020-10-23 20:33:25,889 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoq
[2020-10-23 20:33:25,889 INFO  L130     BoogieDeclarations]: Found specification of procedure strtouq
[2020-10-23 20:33:25,889 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoll
[2020-10-23 20:33:25,889 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoull
[2020-10-23 20:33:25,889 INFO  L130     BoogieDeclarations]: Found specification of procedure l64a
[2020-10-23 20:33:25,890 INFO  L130     BoogieDeclarations]: Found specification of procedure a64l
[2020-10-23 20:33:25,890 INFO  L130     BoogieDeclarations]: Found specification of procedure __bswap_32
[2020-10-23 20:33:25,890 INFO  L130     BoogieDeclarations]: Found specification of procedure __bswap_64
[2020-10-23 20:33:25,890 INFO  L130     BoogieDeclarations]: Found specification of procedure __uint16_identity
[2020-10-23 20:33:25,890 INFO  L130     BoogieDeclarations]: Found specification of procedure __uint32_identity
[2020-10-23 20:33:25,890 INFO  L130     BoogieDeclarations]: Found specification of procedure __uint64_identity
[2020-10-23 20:33:25,891 INFO  L130     BoogieDeclarations]: Found specification of procedure select
[2020-10-23 20:33:25,891 INFO  L130     BoogieDeclarations]: Found specification of procedure pselect
[2020-10-23 20:33:25,891 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_major
[2020-10-23 20:33:25,891 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_minor
[2020-10-23 20:33:25,891 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_makedev
[2020-10-23 20:33:25,891 INFO  L130     BoogieDeclarations]: Found specification of procedure random
[2020-10-23 20:33:25,891 INFO  L130     BoogieDeclarations]: Found specification of procedure srandom
[2020-10-23 20:33:25,892 INFO  L130     BoogieDeclarations]: Found specification of procedure initstate
[2020-10-23 20:33:25,892 INFO  L130     BoogieDeclarations]: Found specification of procedure setstate
[2020-10-23 20:33:25,892 INFO  L130     BoogieDeclarations]: Found specification of procedure random_r
[2020-10-23 20:33:25,892 INFO  L130     BoogieDeclarations]: Found specification of procedure srandom_r
[2020-10-23 20:33:25,892 INFO  L130     BoogieDeclarations]: Found specification of procedure initstate_r
[2020-10-23 20:33:25,892 INFO  L130     BoogieDeclarations]: Found specification of procedure setstate_r
[2020-10-23 20:33:25,892 INFO  L130     BoogieDeclarations]: Found specification of procedure rand
[2020-10-23 20:33:25,893 INFO  L130     BoogieDeclarations]: Found specification of procedure srand
[2020-10-23 20:33:25,893 INFO  L130     BoogieDeclarations]: Found specification of procedure rand_r
[2020-10-23 20:33:25,893 INFO  L130     BoogieDeclarations]: Found specification of procedure drand48
[2020-10-23 20:33:25,893 INFO  L130     BoogieDeclarations]: Found specification of procedure erand48
[2020-10-23 20:33:25,893 INFO  L130     BoogieDeclarations]: Found specification of procedure lrand48
[2020-10-23 20:33:25,893 INFO  L130     BoogieDeclarations]: Found specification of procedure nrand48
[2020-10-23 20:33:25,893 INFO  L130     BoogieDeclarations]: Found specification of procedure mrand48
[2020-10-23 20:33:25,894 INFO  L130     BoogieDeclarations]: Found specification of procedure jrand48
[2020-10-23 20:33:25,894 INFO  L130     BoogieDeclarations]: Found specification of procedure srand48
[2020-10-23 20:33:25,894 INFO  L130     BoogieDeclarations]: Found specification of procedure seed48
[2020-10-23 20:33:25,894 INFO  L130     BoogieDeclarations]: Found specification of procedure lcong48
[2020-10-23 20:33:25,894 INFO  L130     BoogieDeclarations]: Found specification of procedure drand48_r
[2020-10-23 20:33:25,894 INFO  L130     BoogieDeclarations]: Found specification of procedure erand48_r
[2020-10-23 20:33:25,894 INFO  L130     BoogieDeclarations]: Found specification of procedure lrand48_r
[2020-10-23 20:33:25,895 INFO  L130     BoogieDeclarations]: Found specification of procedure nrand48_r
[2020-10-23 20:33:25,895 INFO  L130     BoogieDeclarations]: Found specification of procedure mrand48_r
[2020-10-23 20:33:25,895 INFO  L130     BoogieDeclarations]: Found specification of procedure jrand48_r
[2020-10-23 20:33:25,895 INFO  L130     BoogieDeclarations]: Found specification of procedure srand48_r
[2020-10-23 20:33:25,895 INFO  L130     BoogieDeclarations]: Found specification of procedure seed48_r
[2020-10-23 20:33:25,895 INFO  L130     BoogieDeclarations]: Found specification of procedure lcong48_r
[2020-10-23 20:33:25,896 INFO  L130     BoogieDeclarations]: Found specification of procedure malloc
[2020-10-23 20:33:25,896 INFO  L130     BoogieDeclarations]: Found specification of procedure calloc
[2020-10-23 20:33:25,896 INFO  L130     BoogieDeclarations]: Found specification of procedure realloc
[2020-10-23 20:33:25,896 INFO  L130     BoogieDeclarations]: Found specification of procedure free
[2020-10-23 20:33:25,896 INFO  L130     BoogieDeclarations]: Found specification of procedure alloca
[2020-10-23 20:33:25,896 INFO  L130     BoogieDeclarations]: Found specification of procedure valloc
[2020-10-23 20:33:25,896 INFO  L130     BoogieDeclarations]: Found specification of procedure posix_memalign
[2020-10-23 20:33:25,897 INFO  L130     BoogieDeclarations]: Found specification of procedure aligned_alloc
[2020-10-23 20:33:25,897 INFO  L130     BoogieDeclarations]: Found specification of procedure atexit
[2020-10-23 20:33:25,897 INFO  L130     BoogieDeclarations]: Found specification of procedure at_quick_exit
[2020-10-23 20:33:25,897 INFO  L130     BoogieDeclarations]: Found specification of procedure on_exit
[2020-10-23 20:33:25,897 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2020-10-23 20:33:25,897 INFO  L130     BoogieDeclarations]: Found specification of procedure quick_exit
[2020-10-23 20:33:25,898 INFO  L130     BoogieDeclarations]: Found specification of procedure _Exit
[2020-10-23 20:33:25,898 INFO  L130     BoogieDeclarations]: Found specification of procedure getenv
[2020-10-23 20:33:25,898 INFO  L130     BoogieDeclarations]: Found specification of procedure putenv
[2020-10-23 20:33:25,898 INFO  L130     BoogieDeclarations]: Found specification of procedure setenv
[2020-10-23 20:33:25,898 INFO  L130     BoogieDeclarations]: Found specification of procedure unsetenv
[2020-10-23 20:33:25,898 INFO  L130     BoogieDeclarations]: Found specification of procedure clearenv
[2020-10-23 20:33:25,898 INFO  L130     BoogieDeclarations]: Found specification of procedure mktemp
[2020-10-23 20:33:25,899 INFO  L130     BoogieDeclarations]: Found specification of procedure mkstemp
[2020-10-23 20:33:25,899 INFO  L130     BoogieDeclarations]: Found specification of procedure mkstemps
[2020-10-23 20:33:25,899 INFO  L130     BoogieDeclarations]: Found specification of procedure mkdtemp
[2020-10-23 20:33:25,899 INFO  L130     BoogieDeclarations]: Found specification of procedure system
[2020-10-23 20:33:25,899 INFO  L130     BoogieDeclarations]: Found specification of procedure realpath
[2020-10-23 20:33:25,899 INFO  L130     BoogieDeclarations]: Found specification of procedure bsearch
[2020-10-23 20:33:25,900 INFO  L130     BoogieDeclarations]: Found specification of procedure qsort
[2020-10-23 20:33:25,900 INFO  L130     BoogieDeclarations]: Found specification of procedure abs
[2020-10-23 20:33:25,900 INFO  L130     BoogieDeclarations]: Found specification of procedure labs
[2020-10-23 20:33:25,900 INFO  L130     BoogieDeclarations]: Found specification of procedure llabs
[2020-10-23 20:33:25,900 INFO  L130     BoogieDeclarations]: Found specification of procedure div
[2020-10-23 20:33:25,900 INFO  L130     BoogieDeclarations]: Found specification of procedure ldiv
[2020-10-23 20:33:25,900 INFO  L130     BoogieDeclarations]: Found specification of procedure lldiv
[2020-10-23 20:33:25,901 INFO  L130     BoogieDeclarations]: Found specification of procedure ecvt
[2020-10-23 20:33:25,901 INFO  L130     BoogieDeclarations]: Found specification of procedure fcvt
[2020-10-23 20:33:25,901 INFO  L130     BoogieDeclarations]: Found specification of procedure gcvt
[2020-10-23 20:33:25,901 INFO  L130     BoogieDeclarations]: Found specification of procedure qecvt
[2020-10-23 20:33:25,901 INFO  L130     BoogieDeclarations]: Found specification of procedure qfcvt
[2020-10-23 20:33:25,901 INFO  L130     BoogieDeclarations]: Found specification of procedure qgcvt
[2020-10-23 20:33:25,901 INFO  L130     BoogieDeclarations]: Found specification of procedure ecvt_r
[2020-10-23 20:33:25,902 INFO  L130     BoogieDeclarations]: Found specification of procedure fcvt_r
[2020-10-23 20:33:25,902 INFO  L130     BoogieDeclarations]: Found specification of procedure qecvt_r
[2020-10-23 20:33:25,902 INFO  L130     BoogieDeclarations]: Found specification of procedure qfcvt_r
[2020-10-23 20:33:25,902 INFO  L130     BoogieDeclarations]: Found specification of procedure mblen
[2020-10-23 20:33:25,902 INFO  L130     BoogieDeclarations]: Found specification of procedure mbtowc
[2020-10-23 20:33:25,902 INFO  L130     BoogieDeclarations]: Found specification of procedure wctomb
[2020-10-23 20:33:25,902 INFO  L130     BoogieDeclarations]: Found specification of procedure mbstowcs
[2020-10-23 20:33:25,903 INFO  L130     BoogieDeclarations]: Found specification of procedure wcstombs
[2020-10-23 20:33:25,903 INFO  L130     BoogieDeclarations]: Found specification of procedure rpmatch
[2020-10-23 20:33:25,903 INFO  L130     BoogieDeclarations]: Found specification of procedure getsubopt
[2020-10-23 20:33:25,903 INFO  L130     BoogieDeclarations]: Found specification of procedure getloadavg
[2020-10-23 20:33:25,903 INFO  L130     BoogieDeclarations]: Found specification of procedure myexit
[2020-10-23 20:33:25,903 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-10-23 20:33:25,903 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2020-10-23 20:33:25,904 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-10-23 20:33:25,904 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2020-10-23 20:33:25,904 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2020-10-23 20:33:25,904 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-10-23 20:33:25,904 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-10-23 20:33:25,904 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2020-10-23 20:33:25,904 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-10-23 20:33:25,904 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-10-23 20:33:26,232 INFO  L751   $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true;
[2020-10-23 20:33:26,469 INFO  L293             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-10-23 20:33:26,469 INFO  L298             CfgBuilder]: Removed 4 assume(true) statements.
[2020-10-23 20:33:26,471 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:33:26 BoogieIcfgContainer
[2020-10-23 20:33:26,471 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-10-23 20:33:26,473 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-10-23 20:33:26,473 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-10-23 20:33:26,477 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-10-23 20:33:26,477 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:33:25" (1/3) ...
[2020-10-23 20:33:26,478 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34eeae31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:33:26, skipping insertion in model container
[2020-10-23 20:33:26,478 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:33:25" (2/3) ...
[2020-10-23 20:33:26,478 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34eeae31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:33:26, skipping insertion in model container
[2020-10-23 20:33:26,479 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:33:26" (3/3) ...
[2020-10-23 20:33:26,480 INFO  L111   eAbstractionObserver]: Analyzing ICFG splice-1.i
[2020-10-23 20:33:26,499 INFO  L164   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-10-23 20:33:26,514 INFO  L176   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-10-23 20:33:26,541 INFO  L253      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-10-23 20:33:26,587 INFO  L377      AbstractCegarLoop]: Interprodecural is true
[2020-10-23 20:33:26,588 INFO  L378      AbstractCegarLoop]: Hoare is true
[2020-10-23 20:33:26,588 INFO  L379      AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation
[2020-10-23 20:33:26,588 INFO  L380      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-10-23 20:33:26,588 INFO  L381      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-10-23 20:33:26,589 INFO  L382      AbstractCegarLoop]: Difference is false
[2020-10-23 20:33:26,589 INFO  L383      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-10-23 20:33:26,589 INFO  L387      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-10-23 20:33:26,609 INFO  L276                IsEmpty]: Start isEmpty. Operand 98 states.
[2020-10-23 20:33:26,621 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 40
[2020-10-23 20:33:26,621 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-23 20:33:26,622 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-23 20:33:26,623 INFO  L429      AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 20:33:26,629 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 20:33:26,630 INFO  L82        PathProgramCache]: Analyzing trace with hash 325205440, now seen corresponding path program 1 times
[2020-10-23 20:33:26,640 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-23 20:33:26,641 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083339945]
[2020-10-23 20:33:26,641 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 20:33:26,770 INFO  L321   leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-10-23 20:33:26,869 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:33:27,049 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-23 20:33:27,057 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:33:27,097 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 20:33:27,099 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083339945]
[2020-10-23 20:33:27,102 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-23 20:33:27,102 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-10-23 20:33:27,103 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971429330]
[2020-10-23 20:33:27,110 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-10-23 20:33:27,110 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-23 20:33:27,127 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-10-23 20:33:27,128 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-10-23 20:33:27,131 INFO  L87              Difference]: Start difference. First operand 98 states. Second operand 3 states.
[2020-10-23 20:33:27,466 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-23 20:33:27,466 INFO  L93              Difference]: Finished difference Result 150 states and 176 transitions.
[2020-10-23 20:33:27,472 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-10-23 20:33:27,474 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 39
[2020-10-23 20:33:27,474 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-23 20:33:27,492 INFO  L225             Difference]: With dead ends: 150
[2020-10-23 20:33:27,492 INFO  L226             Difference]: Without dead ends: 82
[2020-10-23 20:33:27,498 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-10-23 20:33:27,519 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 82 states.
[2020-10-23 20:33:27,565 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82.
[2020-10-23 20:33:27,567 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 82 states.
[2020-10-23 20:33:27,573 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions.
[2020-10-23 20:33:27,576 INFO  L78                 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 39
[2020-10-23 20:33:27,576 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-23 20:33:27,576 INFO  L481      AbstractCegarLoop]: Abstraction has 82 states and 88 transitions.
[2020-10-23 20:33:27,576 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-10-23 20:33:27,577 INFO  L276                IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions.
[2020-10-23 20:33:27,582 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 44
[2020-10-23 20:33:27,582 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-23 20:33:27,582 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-23 20:33:27,583 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-10-23 20:33:27,583 INFO  L429      AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 20:33:27,584 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 20:33:27,584 INFO  L82        PathProgramCache]: Analyzing trace with hash -322632441, now seen corresponding path program 1 times
[2020-10-23 20:33:27,584 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-23 20:33:27,584 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823514868]
[2020-10-23 20:33:27,585 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 20:33:27,591 INFO  L321   leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-10-23 20:33:27,623 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:33:27,712 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-23 20:33:27,716 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:33:27,728 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 20:33:27,729 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823514868]
[2020-10-23 20:33:27,729 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-23 20:33:27,729 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-10-23 20:33:27,729 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037822550]
[2020-10-23 20:33:27,730 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-10-23 20:33:27,731 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-23 20:33:27,731 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-10-23 20:33:27,732 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2020-10-23 20:33:27,732 INFO  L87              Difference]: Start difference. First operand 82 states and 88 transitions. Second operand 6 states.
[2020-10-23 20:33:27,974 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-23 20:33:27,974 INFO  L93              Difference]: Finished difference Result 150 states and 163 transitions.
[2020-10-23 20:33:27,974 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-10-23 20:33:27,974 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 43
[2020-10-23 20:33:27,975 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-23 20:33:27,976 INFO  L225             Difference]: With dead ends: 150
[2020-10-23 20:33:27,977 INFO  L226             Difference]: Without dead ends: 104
[2020-10-23 20:33:27,978 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56
[2020-10-23 20:33:27,979 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 104 states.
[2020-10-23 20:33:27,989 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84.
[2020-10-23 20:33:27,989 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 84 states.
[2020-10-23 20:33:27,991 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions.
[2020-10-23 20:33:27,991 INFO  L78                 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 43
[2020-10-23 20:33:27,991 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-23 20:33:27,991 INFO  L481      AbstractCegarLoop]: Abstraction has 84 states and 90 transitions.
[2020-10-23 20:33:27,991 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-10-23 20:33:27,992 INFO  L276                IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions.
[2020-10-23 20:33:27,993 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2020-10-23 20:33:27,993 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-23 20:33:27,994 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-23 20:33:27,994 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-10-23 20:33:27,994 INFO  L429      AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 20:33:27,995 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 20:33:27,995 INFO  L82        PathProgramCache]: Analyzing trace with hash 1699669116, now seen corresponding path program 1 times
[2020-10-23 20:33:27,995 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-23 20:33:27,995 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334362317]
[2020-10-23 20:33:27,996 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 20:33:28,290 WARN  L193               SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 92
[2020-10-23 20:33:28,356 INFO  L545         ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars,  End of recursive call: 1 dim-0 vars,  and 1 xjuncts.
[2020-10-23 20:33:28,434 INFO  L625         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-10-23 20:33:28,440 INFO  L545         ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars,  End of recursive call: 1 dim-0 vars,  and 1 xjuncts.
[2020-10-23 20:33:28,504 INFO  L625         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-10-23 20:33:28,507 INFO  L545         ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars,  End of recursive call: 2 dim-0 vars,  and 1 xjuncts.
[2020-10-23 20:33:28,507 INFO  L244         ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:148, output treesize:124
[2020-10-23 20:33:28,831 WARN  L193               SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 91
[2020-10-23 20:33:28,846 INFO  L545         ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars,  End of recursive call: 1 dim-0 vars,  and 1 xjuncts.
[2020-10-23 20:33:28,923 INFO  L625         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-10-23 20:33:28,930 INFO  L545         ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars,  End of recursive call: 1 dim-0 vars,  and 1 xjuncts.
[2020-10-23 20:33:28,999 INFO  L625         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-10-23 20:33:29,001 INFO  L545         ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars,  End of recursive call: 2 dim-0 vars,  and 1 xjuncts.
[2020-10-23 20:33:29,002 INFO  L244         ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:148, output treesize:124
[2020-10-23 20:33:29,076 INFO  L120            Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found.
[2020-10-23 20:33:29,081 INFO  L321   leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-10-23 20:33:29,095 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:33:29,156 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-23 20:33:29,160 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:33:29,180 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 20:33:29,181 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334362317]
[2020-10-23 20:33:29,182 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-23 20:33:29,183 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-10-23 20:33:29,184 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611924855]
[2020-10-23 20:33:29,185 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-10-23 20:33:29,185 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-23 20:33:29,186 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-10-23 20:33:29,186 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-10-23 20:33:29,186 INFO  L87              Difference]: Start difference. First operand 84 states and 90 transitions. Second operand 4 states.
[2020-10-23 20:33:29,464 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-23 20:33:29,465 INFO  L93              Difference]: Finished difference Result 195 states and 214 transitions.
[2020-10-23 20:33:29,466 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-10-23 20:33:29,466 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 56
[2020-10-23 20:33:29,466 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-23 20:33:29,471 INFO  L225             Difference]: With dead ends: 195
[2020-10-23 20:33:29,471 INFO  L226             Difference]: Without dead ends: 134
[2020-10-23 20:33:29,472 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-10-23 20:33:29,473 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 134 states.
[2020-10-23 20:33:29,495 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 103.
[2020-10-23 20:33:29,495 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 103 states.
[2020-10-23 20:33:29,496 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 111 transitions.
[2020-10-23 20:33:29,496 INFO  L78                 Accepts]: Start accepts. Automaton has 103 states and 111 transitions. Word has length 56
[2020-10-23 20:33:29,497 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-23 20:33:29,497 INFO  L481      AbstractCegarLoop]: Abstraction has 103 states and 111 transitions.
[2020-10-23 20:33:29,497 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-10-23 20:33:29,497 INFO  L276                IsEmpty]: Start isEmpty. Operand 103 states and 111 transitions.
[2020-10-23 20:33:29,500 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2020-10-23 20:33:29,500 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-23 20:33:29,500 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-23 20:33:29,500 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-10-23 20:33:29,501 INFO  L429      AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 20:33:29,502 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 20:33:29,502 INFO  L82        PathProgramCache]: Analyzing trace with hash -298314368, now seen corresponding path program 1 times
[2020-10-23 20:33:29,503 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-23 20:33:29,503 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884679504]
[2020-10-23 20:33:29,503 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 20:33:29,766 WARN  L193               SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 92
[2020-10-23 20:33:29,780 INFO  L545         ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars,  End of recursive call: 1 dim-0 vars,  and 1 xjuncts.
[2020-10-23 20:33:29,857 INFO  L625         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-10-23 20:33:29,865 INFO  L545         ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars,  End of recursive call: 1 dim-0 vars,  and 1 xjuncts.
[2020-10-23 20:33:29,953 INFO  L625         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-10-23 20:33:29,955 INFO  L545         ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars,  End of recursive call: 2 dim-0 vars,  and 1 xjuncts.
[2020-10-23 20:33:29,956 INFO  L244         ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:149, output treesize:125
[2020-10-23 20:33:30,284 WARN  L193               SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 91
[2020-10-23 20:33:30,306 INFO  L545         ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars,  End of recursive call: 1 dim-0 vars,  and 1 xjuncts.
[2020-10-23 20:33:30,409 WARN  L193               SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 79
[2020-10-23 20:33:30,409 INFO  L625         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-10-23 20:33:30,417 INFO  L545         ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars,  End of recursive call: 1 dim-0 vars,  and 1 xjuncts.
[2020-10-23 20:33:30,494 INFO  L625         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-10-23 20:33:30,496 INFO  L545         ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars,  End of recursive call: 2 dim-0 vars,  and 1 xjuncts.
[2020-10-23 20:33:30,497 INFO  L244         ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:149, output treesize:125
[2020-10-23 20:33:30,588 INFO  L120            Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found.
[2020-10-23 20:33:30,596 INFO  L321   leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-10-23 20:33:30,634 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:33:30,741 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-23 20:33:30,744 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:33:30,753 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 20:33:30,754 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884679504]
[2020-10-23 20:33:30,754 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-23 20:33:30,754 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-10-23 20:33:30,754 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202216915]
[2020-10-23 20:33:30,755 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-10-23 20:33:30,755 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-23 20:33:30,756 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-10-23 20:33:30,756 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-10-23 20:33:30,756 INFO  L87              Difference]: Start difference. First operand 103 states and 111 transitions. Second operand 5 states.
[2020-10-23 20:33:30,992 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-23 20:33:30,992 INFO  L93              Difference]: Finished difference Result 147 states and 160 transitions.
[2020-10-23 20:33:30,993 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-10-23 20:33:30,993 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 56
[2020-10-23 20:33:30,994 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-23 20:33:30,996 INFO  L225             Difference]: With dead ends: 147
[2020-10-23 20:33:30,996 INFO  L226             Difference]: Without dead ends: 126
[2020-10-23 20:33:30,997 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-10-23 20:33:30,997 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 126 states.
[2020-10-23 20:33:31,008 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 108.
[2020-10-23 20:33:31,008 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 108 states.
[2020-10-23 20:33:31,009 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 117 transitions.
[2020-10-23 20:33:31,009 INFO  L78                 Accepts]: Start accepts. Automaton has 108 states and 117 transitions. Word has length 56
[2020-10-23 20:33:31,009 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-23 20:33:31,009 INFO  L481      AbstractCegarLoop]: Abstraction has 108 states and 117 transitions.
[2020-10-23 20:33:31,010 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-10-23 20:33:31,010 INFO  L276                IsEmpty]: Start isEmpty. Operand 108 states and 117 transitions.
[2020-10-23 20:33:31,011 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 59
[2020-10-23 20:33:31,011 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-23 20:33:31,011 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-23 20:33:31,011 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-10-23 20:33:31,011 INFO  L429      AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 20:33:31,012 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 20:33:31,012 INFO  L82        PathProgramCache]: Analyzing trace with hash 152366671, now seen corresponding path program 1 times
[2020-10-23 20:33:31,012 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-23 20:33:31,012 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227084223]
[2020-10-23 20:33:31,013 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 20:33:31,240 WARN  L193               SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 92
[2020-10-23 20:33:31,265 INFO  L545         ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars,  End of recursive call: 1 dim-0 vars,  and 1 xjuncts.
[2020-10-23 20:33:31,345 INFO  L625         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-10-23 20:33:31,358 INFO  L545         ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars,  End of recursive call: 1 dim-0 vars,  and 1 xjuncts.
[2020-10-23 20:33:31,431 INFO  L625         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-10-23 20:33:31,433 INFO  L545         ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars,  End of recursive call: 2 dim-0 vars,  and 1 xjuncts.
[2020-10-23 20:33:31,433 INFO  L244         ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:149, output treesize:125
[2020-10-23 20:33:31,767 WARN  L193               SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 91
[2020-10-23 20:33:31,788 INFO  L545         ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars,  End of recursive call: 1 dim-0 vars,  and 1 xjuncts.
[2020-10-23 20:33:31,880 INFO  L625         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-10-23 20:33:31,887 INFO  L545         ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars,  End of recursive call: 1 dim-0 vars,  and 1 xjuncts.
[2020-10-23 20:33:31,964 INFO  L625         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-10-23 20:33:31,966 INFO  L545         ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars,  End of recursive call: 2 dim-0 vars,  and 1 xjuncts.
[2020-10-23 20:33:31,966 INFO  L244         ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:149, output treesize:125
[2020-10-23 20:33:32,042 INFO  L120            Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found.
[2020-10-23 20:33:32,046 INFO  L321   leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-10-23 20:33:32,071 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:33:32,149 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-23 20:33:32,152 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:33:32,163 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 20:33:32,164 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227084223]
[2020-10-23 20:33:32,164 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-23 20:33:32,164 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-10-23 20:33:32,164 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208200686]
[2020-10-23 20:33:32,165 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-10-23 20:33:32,165 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-23 20:33:32,166 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-10-23 20:33:32,166 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-10-23 20:33:32,166 INFO  L87              Difference]: Start difference. First operand 108 states and 117 transitions. Second operand 5 states.
[2020-10-23 20:33:32,405 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-23 20:33:32,406 INFO  L93              Difference]: Finished difference Result 152 states and 165 transitions.
[2020-10-23 20:33:32,406 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-10-23 20:33:32,406 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 58
[2020-10-23 20:33:32,407 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-23 20:33:32,408 INFO  L225             Difference]: With dead ends: 152
[2020-10-23 20:33:32,409 INFO  L226             Difference]: Without dead ends: 135
[2020-10-23 20:33:32,409 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-10-23 20:33:32,410 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 135 states.
[2020-10-23 20:33:32,423 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131.
[2020-10-23 20:33:32,423 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 131 states.
[2020-10-23 20:33:32,424 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 142 transitions.
[2020-10-23 20:33:32,424 INFO  L78                 Accepts]: Start accepts. Automaton has 131 states and 142 transitions. Word has length 58
[2020-10-23 20:33:32,424 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-23 20:33:32,424 INFO  L481      AbstractCegarLoop]: Abstraction has 131 states and 142 transitions.
[2020-10-23 20:33:32,425 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-10-23 20:33:32,425 INFO  L276                IsEmpty]: Start isEmpty. Operand 131 states and 142 transitions.
[2020-10-23 20:33:32,426 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 68
[2020-10-23 20:33:32,426 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-23 20:33:32,426 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-23 20:33:32,426 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-10-23 20:33:32,426 INFO  L429      AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 20:33:32,427 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 20:33:32,427 INFO  L82        PathProgramCache]: Analyzing trace with hash 1310006761, now seen corresponding path program 1 times
[2020-10-23 20:33:32,427 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-23 20:33:32,427 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82024709]
[2020-10-23 20:33:32,428 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 20:33:32,790 WARN  L193               SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 92
[2020-10-23 20:33:32,811 INFO  L545         ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars,  End of recursive call: 1 dim-0 vars,  and 1 xjuncts.
[2020-10-23 20:33:32,902 INFO  L625         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-10-23 20:33:32,915 INFO  L545         ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars,  End of recursive call: 1 dim-0 vars,  and 1 xjuncts.
[2020-10-23 20:33:32,980 INFO  L625         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-10-23 20:33:32,981 INFO  L545         ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars,  End of recursive call: 2 dim-0 vars,  and 1 xjuncts.
[2020-10-23 20:33:32,981 INFO  L244         ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:149, output treesize:125
[2020-10-23 20:33:33,278 WARN  L193               SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 91
[2020-10-23 20:33:33,293 INFO  L545         ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars,  End of recursive call: 1 dim-0 vars,  and 1 xjuncts.
[2020-10-23 20:33:33,374 INFO  L625         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-10-23 20:33:33,380 INFO  L545         ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars,  End of recursive call: 1 dim-0 vars,  and 1 xjuncts.
[2020-10-23 20:33:33,451 INFO  L625         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-10-23 20:33:33,452 INFO  L545         ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars,  End of recursive call: 2 dim-0 vars,  and 1 xjuncts.
[2020-10-23 20:33:33,453 INFO  L244         ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:149, output treesize:125
[2020-10-23 20:33:33,622 INFO  L120            Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found.
[2020-10-23 20:33:33,626 INFO  L321   leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-10-23 20:33:33,668 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-10-23 20:33:33,668 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-10-23 20:33:33,723 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-10-23 20:33:33,724 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-10-23 20:33:33,776 INFO  L173   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-10-23 20:33:33,777 INFO  L523         BasicCegarLoop]: Counterexample might be feasible
[2020-10-23 20:33:33,777 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-10-23 20:33:33,796 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:33:33 BoogieIcfgContainer
[2020-10-23 20:33:33,796 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-10-23 20:33:33,800 INFO  L168              Benchmark]: Toolchain (without parser) took 8585.89 ms. Allocated memory was 151.0 MB in the beginning and 242.2 MB in the end (delta: 91.2 MB). Free memory was 125.1 MB in the beginning and 130.0 MB in the end (delta: -4.8 MB). Peak memory consumption was 87.1 MB. Max. memory is 8.0 GB.
[2020-10-23 20:33:33,801 INFO  L168              Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 125.2 MB. There was no memory consumed. Max. memory is 8.0 GB.
[2020-10-23 20:33:33,802 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 481.74 ms. Allocated memory is still 151.0 MB. Free memory was 124.5 MB in the beginning and 102.6 MB in the end (delta: 21.9 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB.
[2020-10-23 20:33:33,803 INFO  L168              Benchmark]: Boogie Preprocessor took 68.82 ms. Allocated memory is still 151.0 MB. Free memory was 102.6 MB in the beginning and 99.7 MB in the end (delta: 2.8 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB.
[2020-10-23 20:33:33,803 INFO  L168              Benchmark]: RCFGBuilder took 698.22 ms. Allocated memory is still 151.0 MB. Free memory was 99.7 MB in the beginning and 84.7 MB in the end (delta: 15.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 8.0 GB.
[2020-10-23 20:33:33,804 INFO  L168              Benchmark]: TraceAbstraction took 7322.88 ms. Allocated memory was 151.0 MB in the beginning and 242.2 MB in the end (delta: 91.2 MB). Free memory was 84.7 MB in the beginning and 130.0 MB in the end (delta: -45.3 MB). Peak memory consumption was 46.0 MB. Max. memory is 8.0 GB.
[2020-10-23 20:33:33,807 INFO  L339   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 151.0 MB. Free memory is still 125.2 MB. There was no memory consumed. Max. memory is 8.0 GB.
 * CACSL2BoogieTranslator took 481.74 ms. Allocated memory is still 151.0 MB. Free memory was 124.5 MB in the beginning and 102.6 MB in the end (delta: 21.9 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB.
 * Boogie Preprocessor took 68.82 ms. Allocated memory is still 151.0 MB. Free memory was 102.6 MB in the beginning and 99.7 MB in the end (delta: 2.8 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB.
 * RCFGBuilder took 698.22 ms. Allocated memory is still 151.0 MB. Free memory was 99.7 MB in the beginning and 84.7 MB in the end (delta: 15.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 8.0 GB.
 * TraceAbstraction took 7322.88 ms. Allocated memory was 151.0 MB in the beginning and 242.2 MB in the end (delta: 91.2 MB). Free memory was 84.7 MB in the beginning and 130.0 MB in the end (delta: -45.3 MB). Peak memory consumption was 46.0 MB. Max. memory is 8.0 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable
    a call of __VERIFIER_error() is reachable
We found a FailurePath: 
[L532]              int flag = 1;
[L533]              List a = (List) malloc(sizeof(struct node));
[L534]  COND FALSE  !(a == 0)
[L535]              List t;
[L536]              List l1;
[L537]              List l2;
[L538]              List b;
[L539]              List u;
[L540]              List p = a;
[L541]  COND TRUE   __VERIFIER_nondet_int()
[L542]  COND TRUE   \read(flag)
[L543]              p->h = 1
[L544]              flag = 0
[L549]              t = (List) malloc(sizeof(struct node))
[L550]  COND FALSE  !(t == 0)
[L551]              p->n = t
[L552]  EXPR        p->n
[L552]              p = p->n
[L541]  COND FALSE  !(__VERIFIER_nondet_int())
[L554]              p->h = 3
[L555]  EXPR        a->h
[L555]  COND FALSE  !(a->h == 3)
[L556]              flag = 1
[L557]              l1 = 0
[L558]              l2 = 0
[L559]              p = a
[L560]  EXPR        p->h
[L560]  COND TRUE   p->h != 3
[L561]              t = p
[L562]  EXPR        p->n
[L562]              p = p->n
[L563]  COND TRUE   \read(flag)
[L564]              t->n = l1
[L565]              l1 = t
[L566]              flag = 0
[L560]  EXPR        p->h
[L560]  COND FALSE  !(p->h != 3)
[L573]              p = l1
[L574]  COND TRUE   p != 0
[L575]  EXPR        p->h
[L575]  COND TRUE   p->h != 2
[L584]  CALL        reach_error()
[L12]   COND FALSE  !(0)
[L12]               __assert_fail ("0", "splice-1.c", 3, __extension__ __PRETTY_FUNCTION__)

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 10 procedures, 121 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.1s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 447 SDtfs, 133 SDslu, 552 SDs, 0 SdLazy, 582 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=131occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 73 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...