/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/ldv-regression/stateful_check.c
--------------------------------------------------------------------------------
This is Ultimate 0.2.0-b8ad66e
[2020-10-23 20:34:25,257 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-10-23 20:34:25,260 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-10-23 20:34:25,315 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-10-23 20:34:25,315 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-10-23 20:34:25,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-10-23 20:34:25,323 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-10-23 20:34:25,330 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-10-23 20:34:25,333 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-10-23 20:34:25,339 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-10-23 20:34:25,340 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-10-23 20:34:25,341 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-10-23 20:34:25,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-10-23 20:34:25,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-10-23 20:34:25,346 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-10-23 20:34:25,348 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-10-23 20:34:25,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-10-23 20:34:25,352 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-10-23 20:34:25,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-10-23 20:34:25,366 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-10-23 20:34:25,368 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-10-23 20:34:25,369 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-10-23 20:34:25,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-10-23 20:34:25,373 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-10-23 20:34:25,381 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-10-23 20:34:25,381 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-10-23 20:34:25,382 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-10-23 20:34:25,384 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-10-23 20:34:25,384 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-10-23 20:34:25,385 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-10-23 20:34:25,386 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-10-23 20:34:25,387 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-10-23 20:34:25,388 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-10-23 20:34:25,389 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-10-23 20:34:25,403 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-10-23 20:34:25,403 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-10-23 20:34:25,404 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-10-23 20:34:25,404 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-10-23 20:34:25,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-10-23 20:34:25,406 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-10-23 20:34:25,407 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-10-23 20:34:25,408 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 20:34:25,430 INFO L113 SettingsManager]: Loading preferences was successful
[2020-10-23 20:34:25,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-10-23 20:34:25,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-10-23 20:34:25,434 INFO L138 SettingsManager]: * sizeof long=4
[2020-10-23 20:34:25,435 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-10-23 20:34:25,435 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-10-23 20:34:25,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-10-23 20:34:25,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-10-23 20:34:25,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-10-23 20:34:25,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-10-23 20:34:25,437 INFO L138 SettingsManager]: * sizeof long double=12
[2020-10-23 20:34:25,437 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-10-23 20:34:25,437 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-10-23 20:34:25,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-10-23 20:34:25,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-10-23 20:34:25,438 INFO L138 SettingsManager]: * Size of a code block=SingleStatement
[2020-10-23 20:34:25,438 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-10-23 20:34:25,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-10-23 20:34:25,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-10-23 20:34:25,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-10-23 20:34:25,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2020-10-23 20:34:25,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-10-23 20:34:25,440 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2020-10-23 20:34:25,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2020-10-23 20:34:25,845 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-10-23 20:34:25,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-10-23 20:34:25,850 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-10-23 20:34:25,851 INFO L275 PluginConnector]: CDTParser initialized
[2020-10-23 20:34:25,852 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/stateful_check.c
[2020-10-23 20:34:25,929 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a05a3527f/afb000e6536a404db314f0e23702dc9a/FLAGdd440b774
[2020-10-23 20:34:26,524 INFO L306 CDTParser]: Found 1 translation units.
[2020-10-23 20:34:26,525 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/stateful_check.c
[2020-10-23 20:34:26,535 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a05a3527f/afb000e6536a404db314f0e23702dc9a/FLAGdd440b774
[2020-10-23 20:34:26,884 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a05a3527f/afb000e6536a404db314f0e23702dc9a
[2020-10-23 20:34:26,887 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-10-23 20:34:26,896 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-10-23 20:34:26,903 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-10-23 20:34:26,903 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-10-23 20:34:26,907 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-10-23 20:34:26,908 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:34:26" (1/1) ...
[2020-10-23 20:34:26,911 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@712e92e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:34:26, skipping insertion in model container
[2020-10-23 20:34:26,911 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:34:26" (1/1) ...
[2020-10-23 20:34:26,920 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-10-23 20:34:26,942 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-10-23 20:34:27,119 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-10-23 20:34:27,131 INFO L203 MainTranslator]: Completed pre-run
[2020-10-23 20:34:27,157 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-10-23 20:34:27,182 INFO L208 MainTranslator]: Completed translation
[2020-10-23 20:34:27,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:34:27 WrapperNode
[2020-10-23 20:34:27,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-10-23 20:34:27,186 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-10-23 20:34:27,186 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-10-23 20:34:27,186 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-10-23 20:34:27,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:34:27" (1/1) ...
[2020-10-23 20:34:27,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:34:27" (1/1) ...
[2020-10-23 20:34:27,212 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:34:27" (1/1) ...
[2020-10-23 20:34:27,212 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:34:27" (1/1) ...
[2020-10-23 20:34:27,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:34:27" (1/1) ...
[2020-10-23 20:34:27,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:34:27" (1/1) ...
[2020-10-23 20:34:27,245 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:34:27" (1/1) ...
[2020-10-23 20:34:27,248 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-10-23 20:34:27,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-10-23 20:34:27,249 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-10-23 20:34:27,249 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-10-23 20:34:27,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:34:27" (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 20:34:27,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-10-23 20:34:27,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-10-23 20:34:27,327 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error
[2020-10-23 20:34:27,327 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert
[2020-10-23 20:34:27,327 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock
[2020-10-23 20:34:27,327 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock
[2020-10-23 20:34:27,328 INFO L138 BoogieDeclarations]: Found implementation of procedure check_final_state
[2020-10-23 20:34:27,328 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_release
[2020-10-23 20:34:27,328 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_llseek
[2020-10-23 20:34:27,328 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_read
[2020-10-23 20:34:27,328 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_open
[2020-10-23 20:34:27,328 INFO L138 BoogieDeclarations]: Found implementation of procedure my_init
[2020-10-23 20:34:27,329 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-10-23 20:34:27,329 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2020-10-23 20:34:27,329 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail
[2020-10-23 20:34:27,329 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error
[2020-10-23 20:34:27,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-10-23 20:34:27,330 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert
[2020-10-23 20:34:27,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-10-23 20:34:27,330 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock
[2020-10-23 20:34:27,330 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock
[2020-10-23 20:34:27,330 INFO L130 BoogieDeclarations]: Found specification of procedure check_final_state
[2020-10-23 20:34:27,331 INFO L130 BoogieDeclarations]: Found specification of procedure misc_release
[2020-10-23 20:34:27,331 INFO L130 BoogieDeclarations]: Found specification of procedure misc_llseek
[2020-10-23 20:34:27,331 INFO L130 BoogieDeclarations]: Found specification of procedure misc_read
[2020-10-23 20:34:27,331 INFO L130 BoogieDeclarations]: Found specification of procedure misc_open
[2020-10-23 20:34:27,331 INFO L130 BoogieDeclarations]: Found specification of procedure my_init
[2020-10-23 20:34:27,332 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-10-23 20:34:27,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-10-23 20:34:27,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2020-10-23 20:34:27,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-10-23 20:34:27,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2020-10-23 20:34:27,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2020-10-23 20:34:27,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-10-23 20:34:27,772 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-10-23 20:34:27,772 INFO L298 CfgBuilder]: Removed 1 assume(true) statements.
[2020-10-23 20:34:27,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:34:27 BoogieIcfgContainer
[2020-10-23 20:34:27,775 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-10-23 20:34:27,776 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-10-23 20:34:27,776 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-10-23 20:34:27,780 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-10-23 20:34:27,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:34:26" (1/3) ...
[2020-10-23 20:34:27,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5acf34cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:34:27, skipping insertion in model container
[2020-10-23 20:34:27,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:34:27" (2/3) ...
[2020-10-23 20:34:27,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5acf34cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:34:27, skipping insertion in model container
[2020-10-23 20:34:27,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:34:27" (3/3) ...
[2020-10-23 20:34:27,783 INFO L111 eAbstractionObserver]: Analyzing ICFG stateful_check.c
[2020-10-23 20:34:27,794 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-10-23 20:34:27,799 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-10-23 20:34:27,811 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-10-23 20:34:27,836 INFO L377 AbstractCegarLoop]: Interprodecural is true
[2020-10-23 20:34:27,836 INFO L378 AbstractCegarLoop]: Hoare is true
[2020-10-23 20:34:27,836 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation
[2020-10-23 20:34:27,837 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-10-23 20:34:27,837 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-10-23 20:34:27,837 INFO L382 AbstractCegarLoop]: Difference is false
[2020-10-23 20:34:27,837 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-10-23 20:34:27,837 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-10-23 20:34:27,856 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states.
[2020-10-23 20:34:27,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2020-10-23 20:34:27,866 INFO L414 BasicCegarLoop]: Found error trace
[2020-10-23 20:34:27,867 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-23 20:34:27,867 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 20:34:27,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 20:34:27,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1164333913, now seen corresponding path program 1 times
[2020-10-23 20:34:27,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-23 20:34:27,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465229147]
[2020-10-23 20:34:27,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 20:34:27,967 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-10-23 20:34:28,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:34:28,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-23 20:34:28,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:34:28,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15
[2020-10-23 20:34:28,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:34:28,267 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 20:34:28,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465229147]
[2020-10-23 20:34:28,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-23 20:34:28,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-10-23 20:34:28,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781476745]
[2020-10-23 20:34:28,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-10-23 20:34:28,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-23 20:34:28,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-10-23 20:34:28,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2020-10-23 20:34:28,302 INFO L87 Difference]: Start difference. First operand 117 states. Second operand 4 states.
[2020-10-23 20:34:28,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-23 20:34:28,762 INFO L93 Difference]: Finished difference Result 212 states and 258 transitions.
[2020-10-23 20:34:28,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states.
[2020-10-23 20:34:28,764 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28
[2020-10-23 20:34:28,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-23 20:34:28,777 INFO L225 Difference]: With dead ends: 212
[2020-10-23 20:34:28,777 INFO L226 Difference]: Without dead ends: 110
[2020-10-23 20:34:28,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2020-10-23 20:34:28,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states.
[2020-10-23 20:34:28,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105.
[2020-10-23 20:34:28,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states.
[2020-10-23 20:34:28,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 120 transitions.
[2020-10-23 20:34:28,893 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 120 transitions. Word has length 28
[2020-10-23 20:34:28,893 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-10-23 20:34:28,894 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 120 transitions.
[2020-10-23 20:34:28,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-10-23 20:34:28,894 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 120 transitions.
[2020-10-23 20:34:28,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2020-10-23 20:34:28,897 INFO L414 BasicCegarLoop]: Found error trace
[2020-10-23 20:34:28,897 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]
[2020-10-23 20:34:28,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-10-23 20:34:28,897 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 20:34:28,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 20:34:28,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1140018033, now seen corresponding path program 1 times
[2020-10-23 20:34:28,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-23 20:34:28,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085617470]
[2020-10-23 20:34:28,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 20:34:28,908 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-10-23 20:34:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:34:29,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-23 20:34:29,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:34:29,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15
[2020-10-23 20:34:29,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:34:29,122 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 20:34:29,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085617470]
[2020-10-23 20:34:29,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-23 20:34:29,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-10-23 20:34:29,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036930047]
[2020-10-23 20:34:29,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-10-23 20:34:29,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-23 20:34:29,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-10-23 20:34:29,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2020-10-23 20:34:29,125 INFO L87 Difference]: Start difference. First operand 105 states and 120 transitions. Second operand 5 states.
[2020-10-23 20:34:29,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-23 20:34:29,562 INFO L93 Difference]: Finished difference Result 181 states and 212 transitions.
[2020-10-23 20:34:29,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2020-10-23 20:34:29,563 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30
[2020-10-23 20:34:29,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-23 20:34:29,567 INFO L225 Difference]: With dead ends: 181
[2020-10-23 20:34:29,567 INFO L226 Difference]: Without dead ends: 173
[2020-10-23 20:34:29,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42
[2020-10-23 20:34:29,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states.
[2020-10-23 20:34:29,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169.
[2020-10-23 20:34:29,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states.
[2020-10-23 20:34:29,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 199 transitions.
[2020-10-23 20:34:29,605 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 199 transitions. Word has length 30
[2020-10-23 20:34:29,605 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-10-23 20:34:29,605 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 199 transitions.
[2020-10-23 20:34:29,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-10-23 20:34:29,606 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 199 transitions.
[2020-10-23 20:34:29,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48
[2020-10-23 20:34:29,608 INFO L414 BasicCegarLoop]: Found error trace
[2020-10-23 20:34:29,608 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-23 20:34:29,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-10-23 20:34:29,609 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 20:34:29,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 20:34:29,609 INFO L82 PathProgramCache]: Analyzing trace with hash -555133441, now seen corresponding path program 1 times
[2020-10-23 20:34:29,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-23 20:34:29,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810030220]
[2020-10-23 20:34:29,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 20:34:29,613 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-10-23 20:34:29,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:34:29,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-23 20:34:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:34:29,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15
[2020-10-23 20:34:29,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:34:29,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-10-23 20:34:29,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:34:29,739 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 20:34:29,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810030220]
[2020-10-23 20:34:29,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-23 20:34:29,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-10-23 20:34:29,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749723964]
[2020-10-23 20:34:29,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-10-23 20:34:29,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-23 20:34:29,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-10-23 20:34:29,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-10-23 20:34:29,743 INFO L87 Difference]: Start difference. First operand 169 states and 199 transitions. Second operand 6 states.
[2020-10-23 20:34:30,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-23 20:34:30,138 INFO L93 Difference]: Finished difference Result 421 states and 524 transitions.
[2020-10-23 20:34:30,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states.
[2020-10-23 20:34:30,139 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47
[2020-10-23 20:34:30,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-23 20:34:30,142 INFO L225 Difference]: With dead ends: 421
[2020-10-23 20:34:30,142 INFO L226 Difference]: Without dead ends: 274
[2020-10-23 20:34:30,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72
[2020-10-23 20:34:30,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states.
[2020-10-23 20:34:30,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 209.
[2020-10-23 20:34:30,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states.
[2020-10-23 20:34:30,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 250 transitions.
[2020-10-23 20:34:30,193 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 250 transitions. Word has length 47
[2020-10-23 20:34:30,193 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-10-23 20:34:30,193 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 250 transitions.
[2020-10-23 20:34:30,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-10-23 20:34:30,193 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 250 transitions.
[2020-10-23 20:34:30,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69
[2020-10-23 20:34:30,196 INFO L414 BasicCegarLoop]: Found error trace
[2020-10-23 20:34:30,196 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-23 20:34:30,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-10-23 20:34:30,196 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 20:34:30,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 20:34:30,197 INFO L82 PathProgramCache]: Analyzing trace with hash -255317781, now seen corresponding path program 1 times
[2020-10-23 20:34:30,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-23 20:34:30,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027740047]
[2020-10-23 20:34:30,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 20:34:30,304 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40
[2020-10-23 20:34:30,768 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31
[2020-10-23 20:34:31,010 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found.
[2020-10-23 20:34:31,011 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-10-23 20:34:31,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:34:31,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-23 20:34:31,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:34:31,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15
[2020-10-23 20:34:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:34:31,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29
[2020-10-23 20:34:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:34:31,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58
[2020-10-23 20:34:31,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:34:31,156 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 20:34:31,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027740047]
[2020-10-23 20:34:31,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-23 20:34:31,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2020-10-23 20:34:31,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065870412]
[2020-10-23 20:34:31,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-10-23 20:34:31,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-23 20:34:31,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-10-23 20:34:31,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2020-10-23 20:34:31,159 INFO L87 Difference]: Start difference. First operand 209 states and 250 transitions. Second operand 8 states.
[2020-10-23 20:34:31,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-23 20:34:31,689 INFO L93 Difference]: Finished difference Result 523 states and 653 transitions.
[2020-10-23 20:34:31,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states.
[2020-10-23 20:34:31,690 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68
[2020-10-23 20:34:31,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-23 20:34:31,693 INFO L225 Difference]: With dead ends: 523
[2020-10-23 20:34:31,693 INFO L226 Difference]: Without dead ends: 336
[2020-10-23 20:34:31,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240
[2020-10-23 20:34:31,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states.
[2020-10-23 20:34:31,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 249.
[2020-10-23 20:34:31,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states.
[2020-10-23 20:34:31,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 305 transitions.
[2020-10-23 20:34:31,755 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 305 transitions. Word has length 68
[2020-10-23 20:34:31,755 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-10-23 20:34:31,755 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 305 transitions.
[2020-10-23 20:34:31,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-10-23 20:34:31,755 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 305 transitions.
[2020-10-23 20:34:31,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89
[2020-10-23 20:34:31,757 INFO L414 BasicCegarLoop]: Found error trace
[2020-10-23 20:34:31,758 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 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 20:34:31,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-10-23 20:34:31,758 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 20:34:31,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 20:34:31,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1130016885, now seen corresponding path program 1 times
[2020-10-23 20:34:31,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-23 20:34:31,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931450131]
[2020-10-23 20:34:31,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 20:34:31,865 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40
[2020-10-23 20:34:32,034 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38
[2020-10-23 20:34:32,900 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38
[2020-10-23 20:34:33,346 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35
[2020-10-23 20:34:33,570 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found.
[2020-10-23 20:34:33,572 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-10-23 20:34:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:34:33,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-23 20:34:33,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:34:33,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15
[2020-10-23 20:34:33,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:34:33,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29
[2020-10-23 20:34:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:34:33,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52
[2020-10-23 20:34:33,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:34:33,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78
[2020-10-23 20:34:33,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:34:33,709 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 20:34:33,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931450131]
[2020-10-23 20:34:33,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-23 20:34:33,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-10-23 20:34:33,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950755937]
[2020-10-23 20:34:33,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-10-23 20:34:33,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-23 20:34:33,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-10-23 20:34:33,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-10-23 20:34:33,712 INFO L87 Difference]: Start difference. First operand 249 states and 305 transitions. Second operand 6 states.
[2020-10-23 20:34:34,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-23 20:34:34,347 INFO L93 Difference]: Finished difference Result 863 states and 1097 transitions.
[2020-10-23 20:34:34,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states.
[2020-10-23 20:34:34,354 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 88
[2020-10-23 20:34:34,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-23 20:34:34,360 INFO L225 Difference]: With dead ends: 863
[2020-10-23 20:34:34,360 INFO L226 Difference]: Without dead ends: 636
[2020-10-23 20:34:34,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72
[2020-10-23 20:34:34,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states.
[2020-10-23 20:34:34,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 402.
[2020-10-23 20:34:34,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states.
[2020-10-23 20:34:34,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 498 transitions.
[2020-10-23 20:34:34,450 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 498 transitions. Word has length 88
[2020-10-23 20:34:34,453 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-10-23 20:34:34,453 INFO L481 AbstractCegarLoop]: Abstraction has 402 states and 498 transitions.
[2020-10-23 20:34:34,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-10-23 20:34:34,453 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 498 transitions.
[2020-10-23 20:34:34,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90
[2020-10-23 20:34:34,462 INFO L414 BasicCegarLoop]: Found error trace
[2020-10-23 20:34:34,463 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 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 20:34:34,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-10-23 20:34:34,464 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 20:34:34,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 20:34:34,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1472238029, now seen corresponding path program 1 times
[2020-10-23 20:34:34,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-23 20:34:34,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080081157]
[2020-10-23 20:34:34,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 20:34:34,579 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38
[2020-10-23 20:34:35,474 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38
[2020-10-23 20:34:36,098 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found.
[2020-10-23 20:34:36,100 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-10-23 20:34:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:34:36,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-23 20:34:36,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:34:36,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15
[2020-10-23 20:34:36,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:34:36,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29
[2020-10-23 20:34:36,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:34:36,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53
[2020-10-23 20:34:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:34:36,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79
[2020-10-23 20:34:36,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:34:36,282 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 20:34:36,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080081157]
[2020-10-23 20:34:36,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-23 20:34:36,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-10-23 20:34:36,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641510865]
[2020-10-23 20:34:36,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-10-23 20:34:36,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-23 20:34:36,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-10-23 20:34:36,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-10-23 20:34:36,284 INFO L87 Difference]: Start difference. First operand 402 states and 498 transitions. Second operand 6 states.
[2020-10-23 20:34:36,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-23 20:34:36,655 INFO L93 Difference]: Finished difference Result 938 states and 1175 transitions.
[2020-10-23 20:34:36,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states.
[2020-10-23 20:34:36,656 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 89
[2020-10-23 20:34:36,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-23 20:34:36,664 INFO L225 Difference]: With dead ends: 938
[2020-10-23 20:34:36,664 INFO L226 Difference]: Without dead ends: 558
[2020-10-23 20:34:36,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90
[2020-10-23 20:34:36,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states.
[2020-10-23 20:34:36,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 408.
[2020-10-23 20:34:36,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states.
[2020-10-23 20:34:36,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 498 transitions.
[2020-10-23 20:34:36,731 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 498 transitions. Word has length 89
[2020-10-23 20:34:36,731 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-10-23 20:34:36,732 INFO L481 AbstractCegarLoop]: Abstraction has 408 states and 498 transitions.
[2020-10-23 20:34:36,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-10-23 20:34:36,732 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 498 transitions.
[2020-10-23 20:34:36,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89
[2020-10-23 20:34:36,734 INFO L414 BasicCegarLoop]: Found error trace
[2020-10-23 20:34:36,734 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 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 20:34:36,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-10-23 20:34:36,734 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 20:34:36,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 20:34:36,735 INFO L82 PathProgramCache]: Analyzing trace with hash 2103210319, now seen corresponding path program 1 times
[2020-10-23 20:34:36,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-23 20:34:36,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450779798]
[2020-10-23 20:34:36,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 20:34:37,719 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38
[2020-10-23 20:34:38,298 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found.
[2020-10-23 20:34:38,300 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-10-23 20:34:38,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:34:38,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-23 20:34:38,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:34:38,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15
[2020-10-23 20:34:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:34:38,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29
[2020-10-23 20:34:38,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:34:38,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52
[2020-10-23 20:34:38,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:34:38,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78
[2020-10-23 20:34:38,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 20:34:38,502 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 20:34:38,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450779798]
[2020-10-23 20:34:38,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-23 20:34:38,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2020-10-23 20:34:38,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924853640]
[2020-10-23 20:34:38,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-10-23 20:34:38,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-23 20:34:38,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-10-23 20:34:38,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2020-10-23 20:34:38,509 INFO L87 Difference]: Start difference. First operand 408 states and 498 transitions. Second operand 8 states.
[2020-10-23 20:34:39,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-23 20:34:39,144 INFO L93 Difference]: Finished difference Result 1180 states and 1519 transitions.
[2020-10-23 20:34:39,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states.
[2020-10-23 20:34:39,145 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 88
[2020-10-23 20:34:39,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-23 20:34:39,151 INFO L225 Difference]: With dead ends: 1180
[2020-10-23 20:34:39,151 INFO L226 Difference]: Without dead ends: 794
[2020-10-23 20:34:39,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240
[2020-10-23 20:34:39,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states.
[2020-10-23 20:34:39,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 488.
[2020-10-23 20:34:39,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488 states.
[2020-10-23 20:34:39,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 612 transitions.
[2020-10-23 20:34:39,251 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 612 transitions. Word has length 88
[2020-10-23 20:34:39,252 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-10-23 20:34:39,252 INFO L481 AbstractCegarLoop]: Abstraction has 488 states and 612 transitions.
[2020-10-23 20:34:39,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-10-23 20:34:39,252 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 612 transitions.
[2020-10-23 20:34:39,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111
[2020-10-23 20:34:39,260 INFO L414 BasicCegarLoop]: Found error trace
[2020-10-23 20:34:39,260 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-23 20:34:39,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2020-10-23 20:34:39,261 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 20:34:39,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 20:34:39,265 INFO L82 PathProgramCache]: Analyzing trace with hash -583058978, now seen corresponding path program 1 times
[2020-10-23 20:34:39,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-23 20:34:39,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814294241]
[2020-10-23 20:34:39,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 20:34:39,409 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43
[2020-10-23 20:34:39,573 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40
[2020-10-23 20:34:39,735 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38
[2020-10-23 20:34:40,036 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40
[2020-10-23 20:34:40,979 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38
[2020-10-23 20:34:41,156 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43
[2020-10-23 20:34:41,767 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38
[2020-10-23 20:34:42,483 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found.
[2020-10-23 20:34:42,485 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-10-23 20:34:42,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-10-23 20:34:42,502 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-10-23 20:34:42,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-10-23 20:34:42,520 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-10-23 20:34:42,566 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-10-23 20:34:42,566 INFO L523 BasicCegarLoop]: Counterexample might be feasible
[2020-10-23 20:34:42,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2020-10-23 20:34:42,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:34:42 BoogieIcfgContainer
[2020-10-23 20:34:42,591 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-10-23 20:34:42,600 INFO L168 Benchmark]: Toolchain (without parser) took 15702.35 ms. Allocated memory was 151.0 MB in the beginning and 327.2 MB in the end (delta: 176.2 MB). Free memory was 127.1 MB in the beginning and 156.1 MB in the end (delta: -29.0 MB). Peak memory consumption was 148.0 MB. Max. memory is 8.0 GB.
[2020-10-23 20:34:42,601 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 127.2 MB. There was no memory consumed. Max. memory is 8.0 GB.
[2020-10-23 20:34:42,602 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.79 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 116.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB.
[2020-10-23 20:34:42,602 INFO L168 Benchmark]: Boogie Preprocessor took 62.29 ms. Allocated memory is still 151.0 MB. Free memory was 116.4 MB in the beginning and 114.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
[2020-10-23 20:34:42,603 INFO L168 Benchmark]: RCFGBuilder took 525.90 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 125.4 MB in the end (delta: -10.5 MB). Peak memory consumption was 16.2 MB. Max. memory is 8.0 GB.
[2020-10-23 20:34:42,607 INFO L168 Benchmark]: TraceAbstraction took 14814.58 ms. Allocated memory was 151.0 MB in the beginning and 327.2 MB in the end (delta: 176.2 MB). Free memory was 124.8 MB in the beginning and 156.1 MB in the end (delta: -31.2 MB). Peak memory consumption was 146.5 MB. Max. memory is 8.0 GB.
[2020-10-23 20:34:42,618 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 127.2 MB. There was no memory consumed. Max. memory is 8.0 GB.
* CACSL2BoogieTranslator took 280.79 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 116.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB.
* Boogie Preprocessor took 62.29 ms. Allocated memory is still 151.0 MB. Free memory was 116.4 MB in the beginning and 114.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
* RCFGBuilder took 525.90 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 125.4 MB in the end (delta: -10.5 MB). Peak memory consumption was 16.2 MB. Max. memory is 8.0 GB.
* TraceAbstraction took 14814.58 ms. Allocated memory was 151.0 MB in the beginning and 327.2 MB in the end (delta: 176.2 MB). Free memory was 124.8 MB in the beginning and 156.1 MB in the end (delta: -31.2 MB). Peak memory consumption was 146.5 MB. Max. memory is 8.0 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable
a call of __VERIFIER_error() is reachable
We found a FailurePath:
[L11] int ldv_mutex = 1;
[L13] int open_called = 0;
[L76] int ldv_s_misc_fops_file_operations = 0;
[L77] CALL my_init()
[L71] open_called = 0
[L72] return 0;
[L77] RET my_init()
[L78] COND TRUE __VERIFIER_nondet_int()
[L82] case 0:
[L83] COND TRUE ldv_s_misc_fops_file_operations==0
[L84] CALL misc_open()
[L59] COND TRUE __VERIFIER_nondet_int()
[L61] return 1;
[L84] RET misc_open()
[L85] ldv_s_misc_fops_file_operations++
[L78] COND TRUE __VERIFIER_nondet_int()
[L82] case 0:
[L90] case 1:
[L91] COND TRUE ldv_s_misc_fops_file_operations==1
[L92] CALL misc_read()
[L54] return 0;
[L92] RET misc_read()
[L93] ldv_s_misc_fops_file_operations++
[L78] COND TRUE __VERIFIER_nondet_int()
[L82] case 0:
[L90] case 1:
[L98] case 2:
[L99] COND TRUE ldv_s_misc_fops_file_operations==2
[L100] CALL misc_llseek()
[L50] return 0;
[L100] RET misc_llseek()
[L101] ldv_s_misc_fops_file_operations++
[L78] COND TRUE __VERIFIER_nondet_int()
[L82] case 0:
[L90] case 1:
[L98] case 2:
[L106] case 3:
[L107] COND TRUE ldv_s_misc_fops_file_operations==3
[L108] CALL misc_release()
[L36] COND FALSE !(\read(open_called))
[L43] CALL mutex_lock()
[L18] (ldv_mutex == 1) ? 0 : __blast_assert()
[L19] ldv_mutex = 2
[L43] RET mutex_lock()
[L44] CALL mutex_lock()
[L18] (ldv_mutex == 1) ? 0 : __blast_assert()
[L18] CALL __blast_assert()
[L6] CALL reach_error()
[L3] __assert_fail("0", "stateful_check.c", 3, "reach_error")
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 13 procedures, 117 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 14.7s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 847 SDtfs, 1261 SDslu, 1529 SDs, 0 SdLazy, 1445 SolverSat, 335 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=488occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 7 MinimizatonAttempts, 851 StatesRemovedByMinimization, 7 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...