/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test29-1.c
--------------------------------------------------------------------------------
This is Ultimate 0.1.25-c90d42b
[2020-09-24 21:37:34,874 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-09-24 21:37:34,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 21:37:34,905 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 21:37:34,905 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 21:37:34,907 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 21:37:34,908 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-24 21:37:34,910 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-24 21:37:34,912 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-24 21:37:34,914 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-24 21:37:34,915 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-09-24 21:37:34,917 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-24 21:37:34,917 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 21:37:34,918 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 21:37:34,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 21:37:34,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 21:37:34,929 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 21:37:34,930 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 21:37:34,935 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 21:37:34,937 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 21:37:34,942 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 21:37:34,946 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 21:37:34,947 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 21:37:34,948 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 21:37:34,956 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 21:37:34,956 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 21:37:34,956 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 21:37:34,959 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 21:37:34,962 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 21:37:34,963 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 21:37:34,963 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-24 21:37:34,964 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-24 21:37:34,966 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-24 21:37:34,967 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-24 21:37:34,969 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 21:37:34,969 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-24 21:37:34,970 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-24 21:37:34,971 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-24 21:37:34,971 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-24 21:37:34,972 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-24 21:37:34,974 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 21:37:34,974 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-09-24 21:37:35,040 INFO L113 SettingsManager]: Loading preferences was successful
[2020-09-24 21:37:35,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 21:37:35,041 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 21:37:35,042 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-09-24 21:37:35,042 INFO L138 SettingsManager]: * Use SBE=true
[2020-09-24 21:37:35,042 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 21:37:35,042 INFO L138 SettingsManager]: * sizeof long=4
[2020-09-24 21:37:35,043 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-09-24 21:37:35,044 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-09-24 21:37:35,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-09-24 21:37:35,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 21:37:35,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 21:37:35,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 21:37:35,045 INFO L138 SettingsManager]: * sizeof long double=12
[2020-09-24 21:37:35,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-09-24 21:37:35,046 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-09-24 21:37:35,047 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-09-24 21:37:35,047 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 21:37:35,048 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-09-24 21:37:35,048 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-09-24 21:37:35,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-09-24 21:37:35,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 21:37:35,049 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 21:37:35,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 21:37:35,049 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 21:37:35,049 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-09-24 21:37:35,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 21:37:35,049 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 21:37:35,050 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-09-24 21:37:35,050 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true;
[2020-09-24 21:37:35,530 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 21:37:35,557 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 21:37:35,561 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 21:37:35,564 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-09-24 21:37:35,564 INFO L275 PluginConnector]: CDTParser initialized
[2020-09-24 21:37:35,566 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test29-1.c
[2020-09-24 21:37:35,659 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/167f81df8/16a56f7c966745929eb86d70f20ab8f7/FLAG43a785fb0
[2020-09-24 21:37:36,223 INFO L306 CDTParser]: Found 1 translation units.
[2020-09-24 21:37:36,224 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test29-1.c
[2020-09-24 21:37:36,233 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/167f81df8/16a56f7c966745929eb86d70f20ab8f7/FLAG43a785fb0
[2020-09-24 21:37:36,556 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/167f81df8/16a56f7c966745929eb86d70f20ab8f7
[2020-09-24 21:37:36,571 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 21:37:36,581 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 21:37:36,582 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 21:37:36,582 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 21:37:36,588 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 21:37:36,589 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:37:36" (1/1) ...
[2020-09-24 21:37:36,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aae5b2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:36, skipping insertion in model container
[2020-09-24 21:37:36,595 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:37:36" (1/1) ...
[2020-09-24 21:37:36,605 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-09-24 21:37:36,631 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-09-24 21:37:36,855 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-24 21:37:36,868 INFO L203 MainTranslator]: Completed pre-run
[2020-09-24 21:37:36,887 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-24 21:37:36,904 INFO L208 MainTranslator]: Completed translation
[2020-09-24 21:37:36,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:36 WrapperNode
[2020-09-24 21:37:36,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 21:37:36,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 21:37:36,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 21:37:36,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 21:37:36,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:36" (1/1) ...
[2020-09-24 21:37:36,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:36" (1/1) ...
[2020-09-24 21:37:37,004 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:36" (1/1) ...
[2020-09-24 21:37:37,005 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:36" (1/1) ...
[2020-09-24 21:37:37,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:36" (1/1) ...
[2020-09-24 21:37:37,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:36" (1/1) ...
[2020-09-24 21:37:37,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:36" (1/1) ...
[2020-09-24 21:37:37,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 21:37:37,020 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 21:37:37,020 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 21:37:37,021 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-09-24 21:37:37,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:36" (1/1) ...
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 21:37:37,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 21:37:37,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 21:37:37,098 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 21:37:37,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 21:37:37,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-09-24 21:37:37,099 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-09-24 21:37:37,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-09-24 21:37:37,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2020-09-24 21:37:37,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2020-09-24 21:37:37,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-09-24 21:37:37,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 21:37:37,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 21:37:37,446 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 21:37:37,447 INFO L295 CfgBuilder]: Removed 0 assume(true) statements.
[2020-09-24 21:37:37,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:37:37 BoogieIcfgContainer
[2020-09-24 21:37:37,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 21:37:37,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 21:37:37,455 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 21:37:37,458 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-09-24 21:37:37,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:37:36" (1/3) ...
[2020-09-24 21:37:37,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@88a0fc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:37:37, skipping insertion in model container
[2020-09-24 21:37:37,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:36" (2/3) ...
[2020-09-24 21:37:37,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@88a0fc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:37:37, skipping insertion in model container
[2020-09-24 21:37:37,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:37:37" (3/3) ...
[2020-09-24 21:37:37,467 INFO L109 eAbstractionObserver]: Analyzing ICFG test29-1.c
[2020-09-24 21:37:37,477 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 21:37:37,487 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-24 21:37:37,508 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-24 21:37:37,536 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-09-24 21:37:37,536 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-09-24 21:37:37,537 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 21:37:37,537 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 21:37:37,537 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 21:37:37,537 INFO L380 AbstractCegarLoop]: Difference is false
[2020-09-24 21:37:37,537 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 21:37:37,537 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 21:37:37,560 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states.
[2020-09-24 21:37:37,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-09-24 21:37:37,568 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 21:37:37,569 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]
[2020-09-24 21:37:37,569 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 21:37:37,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 21:37:37,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1161029953, now seen corresponding path program 1 times
[2020-09-24 21:37:37,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 21:37:37,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53137784]
[2020-09-24 21:37:37,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 21:37:37,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:37:37,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:37:37,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:37:38,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:37:38,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:37:38,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:37:38,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34
[2020-09-24 21:37:38,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4
[2020-09-24 21:37:38,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 746
[2020-09-24 21:37:38,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:37:38,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-24 21:37:38,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-24 21:37:38,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13
[2020-09-24 21:37:38,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4
[2020-09-24 21:37:38,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 21:37:38,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:37:38,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:37:38,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:37:38,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 21:37:38,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:37:38,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7
[2020-09-24 21:37:38,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:37:38,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 21:37:38,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:37:38,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 21:37:38,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 21:37:38,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 21:37:38,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53137784]
[2020-09-24 21:37:38,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 21:37:38,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2020-09-24 21:37:38,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932026156]
[2020-09-24 21:37:38,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-09-24 21:37:38,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 21:37:38,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-09-24 21:37:38,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2020-09-24 21:37:38,664 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 7 states.
[2020-09-24 21:37:38,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 21:37:38,972 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions.
[2020-09-24 21:37:38,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states.
[2020-09-24 21:37:38,974 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27
[2020-09-24 21:37:38,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 21:37:38,988 INFO L225 Difference]: With dead ends: 90
[2020-09-24 21:37:38,989 INFO L226 Difference]: Without dead ends: 48
[2020-09-24 21:37:38,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132
[2020-09-24 21:37:39,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states.
[2020-09-24 21:37:39,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38.
[2020-09-24 21:37:39,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states.
[2020-09-24 21:37:39,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions.
[2020-09-24 21:37:39,049 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 27
[2020-09-24 21:37:39,049 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 21:37:39,049 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions.
[2020-09-24 21:37:39,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-09-24 21:37:39,050 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions.
[2020-09-24 21:37:39,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-09-24 21:37:39,051 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 21:37:39,051 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]
[2020-09-24 21:37:39,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 21:37:39,052 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 21:37:39,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 21:37:39,052 INFO L82 PathProgramCache]: Analyzing trace with hash 462037409, now seen corresponding path program 1 times
[2020-09-24 21:37:39,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 21:37:39,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223346135]
[2020-09-24 21:37:39,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 21:37:39,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:37:39,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:37:39,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:37:39,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:37:39,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34
[2020-09-24 21:37:39,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 21:37:39,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150
[2020-09-24 21:37:39,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:37:39,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 21:37:39,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20
[2020-09-24 21:37:39,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10
[2020-09-24 21:37:39,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 21:37:39,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 21:37:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:37:39,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:37:39,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:37:39,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 21:37:39,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:37:39,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6
[2020-09-24 21:37:39,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:37:39,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 21:37:39,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:37:39,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 21:37:39,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 21:37:39,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 21:37:39,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223346135]
[2020-09-24 21:37:39,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 21:37:39,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-09-24 21:37:39,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934830881]
[2020-09-24 21:37:39,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-09-24 21:37:39,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 21:37:39,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-09-24 21:37:39,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2020-09-24 21:37:39,306 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 6 states.
[2020-09-24 21:37:39,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 21:37:39,426 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions.
[2020-09-24 21:37:39,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2020-09-24 21:37:39,427 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27
[2020-09-24 21:37:39,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 21:37:39,429 INFO L225 Difference]: With dead ends: 53
[2020-09-24 21:37:39,429 INFO L226 Difference]: Without dead ends: 48
[2020-09-24 21:37:39,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2020-09-24 21:37:39,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states.
[2020-09-24 21:37:39,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41.
[2020-09-24 21:37:39,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states.
[2020-09-24 21:37:39,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions.
[2020-09-24 21:37:39,438 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 27
[2020-09-24 21:37:39,439 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 21:37:39,439 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions.
[2020-09-24 21:37:39,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-09-24 21:37:39,439 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions.
[2020-09-24 21:37:39,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-09-24 21:37:39,440 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 21:37:39,441 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]
[2020-09-24 21:37:39,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 21:37:39,441 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 21:37:39,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 21:37:39,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1844949599, now seen corresponding path program 1 times
[2020-09-24 21:37:39,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 21:37:39,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622718646]
[2020-09-24 21:37:39,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 21:37:39,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:37:39,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:37:39,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:37:39,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:37:39,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:37:39,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34
[2020-09-24 21:37:39,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-09-24 21:37:39,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 402
[2020-09-24 21:37:39,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:37:39,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-24 21:37:39,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-24 21:37:39,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17
[2020-09-24 21:37:39,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 21:37:39,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 21:37:39,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:37:39,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:37:39,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:37:39,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 21:37:39,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:37:39,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15
[2020-09-24 21:37:39,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:37:39,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 21:37:39,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:37:39,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 21:37:39,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3
[2020-09-24 21:37:39,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 21:37:39,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622718646]
[2020-09-24 21:37:39,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 21:37:39,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2020-09-24 21:37:39,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581459851]
[2020-09-24 21:37:39,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-09-24 21:37:39,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 21:37:39,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-09-24 21:37:39,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56
[2020-09-24 21:37:39,964 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 8 states.
[2020-09-24 21:37:40,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 21:37:40,178 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions.
[2020-09-24 21:37:40,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states.
[2020-09-24 21:37:40,179 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27
[2020-09-24 21:37:40,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 21:37:40,180 INFO L225 Difference]: With dead ends: 49
[2020-09-24 21:37:40,180 INFO L226 Difference]: Without dead ends: 30
[2020-09-24 21:37:40,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156
[2020-09-24 21:37:40,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states.
[2020-09-24 21:37:40,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30.
[2020-09-24 21:37:40,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states.
[2020-09-24 21:37:40,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 29 transitions.
[2020-09-24 21:37:40,186 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 29 transitions. Word has length 27
[2020-09-24 21:37:40,186 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 21:37:40,187 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 29 transitions.
[2020-09-24 21:37:40,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-09-24 21:37:40,187 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 29 transitions.
[2020-09-24 21:37:40,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2020-09-24 21:37:40,188 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 21:37:40,188 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]
[2020-09-24 21:37:40,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-24 21:37:40,189 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 21:37:40,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 21:37:40,189 INFO L82 PathProgramCache]: Analyzing trace with hash -2120633538, now seen corresponding path program 1 times
[2020-09-24 21:37:40,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 21:37:40,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679649507]
[2020-09-24 21:37:40,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 21:37:40,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-09-24 21:37:40,208 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-09-24 21:37:40,209 INFO L520 BasicCegarLoop]: Counterexample might be feasible
[2020-09-24 21:37:40,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-09-24 21:37:40,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 09:37:40 BoogieIcfgContainer
[2020-09-24 21:37:40,236 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-09-24 21:37:40,240 INFO L168 Benchmark]: Toolchain (without parser) took 3665.16 ms. Allocated memory was 138.4 MB in the beginning and 248.0 MB in the end (delta: 109.6 MB). Free memory was 101.8 MB in the beginning and 213.1 MB in the end (delta: -111.2 MB). There was no memory consumed. Max. memory is 7.1 GB.
[2020-09-24 21:37:40,241 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
[2020-09-24 21:37:40,242 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.29 ms. Allocated memory is still 138.4 MB. Free memory was 100.8 MB in the beginning and 90.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB.
[2020-09-24 21:37:40,243 INFO L168 Benchmark]: Boogie Preprocessor took 114.37 ms. Allocated memory was 138.4 MB in the beginning and 199.8 MB in the end (delta: 61.3 MB). Free memory was 90.9 MB in the beginning and 177.7 MB in the end (delta: -86.8 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB.
[2020-09-24 21:37:40,243 INFO L168 Benchmark]: RCFGBuilder took 433.41 ms. Allocated memory is still 199.8 MB. Free memory was 177.7 MB in the beginning and 161.2 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB.
[2020-09-24 21:37:40,244 INFO L168 Benchmark]: TraceAbstraction took 2781.10 ms. Allocated memory was 199.8 MB in the beginning and 248.0 MB in the end (delta: 48.2 MB). Free memory was 160.5 MB in the beginning and 213.1 MB in the end (delta: -52.6 MB). There was no memory consumed. Max. memory is 7.1 GB.
[2020-09-24 21:37:40,248 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.28 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 323.29 ms. Allocated memory is still 138.4 MB. Free memory was 100.8 MB in the beginning and 90.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 114.37 ms. Allocated memory was 138.4 MB in the beginning and 199.8 MB in the end (delta: 61.3 MB). Free memory was 90.9 MB in the beginning and 177.7 MB in the end (delta: -86.8 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 433.41 ms. Allocated memory is still 199.8 MB. Free memory was 177.7 MB in the beginning and 161.2 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 2781.10 ms. Allocated memory was 199.8 MB in the beginning and 248.0 MB in the end (delta: 48.2 MB). Free memory was 160.5 MB in the beginning and 213.1 MB in the end (delta: -52.6 MB). There was no memory consumed. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- CounterExampleResult [Line: 28]: a call of __VERIFIER_error() is reachable
a call of __VERIFIER_error() is reachable
We found a FailurePath:
[L13] union dummy d1, d2;
[L14] int n = __VERIFIER_nondet_int();
[L15] EXPR n ? &d1 : &d2
[L15] union dummy *pd = n ? &d1 : &d2;
[L16] d1.a = __VERIFIER_nondet_int()
[L17] COND FALSE !(pd == &d1)
[L20] pd->b = 0
[L22] pd == &d2 && d1.a != 0
[L22] EXPR d1.a
[L22] pd == &d2 && d1.a != 0
[L22] COND TRUE pd == &d2 && d1.a != 0
[L28] __VERIFIER_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 3 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.6s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 91 SDtfs, 174 SDslu, 248 SDs, 0 SdLazy, 251 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 17 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 110 NumberOfCodeBlocks, 110 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 6110 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be incorrect!
Received shutdown request...