/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/simple_2-2.c
--------------------------------------------------------------------------------
This is Ultimate 0.1.25-c90d42b
[2020-09-25 06:52:41,651 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-09-25 06:52:41,655 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-25 06:52:41,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-25 06:52:41,683 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-25 06:52:41,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-25 06:52:41,686 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-25 06:52:41,688 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-25 06:52:41,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-25 06:52:41,691 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-25 06:52:41,693 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-09-25 06:52:41,694 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-25 06:52:41,694 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-25 06:52:41,696 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-25 06:52:41,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-25 06:52:41,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-25 06:52:41,699 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-25 06:52:41,701 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-25 06:52:41,703 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-25 06:52:41,705 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-25 06:52:41,707 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-25 06:52:41,708 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-25 06:52:41,710 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-09-25 06:52:41,713 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-25 06:52:41,716 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-25 06:52:41,716 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-25 06:52:41,719 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-25 06:52:41,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-25 06:52:41,721 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-25 06:52:41,725 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-25 06:52:41,725 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-25 06:52:41,727 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-25 06:52:41,728 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-25 06:52:41,729 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-25 06:52:41,730 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-25 06:52:41,731 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-25 06:52:41,731 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-25 06:52:41,732 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-25 06:52:41,732 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-25 06:52:41,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-25 06:52:41,736 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-09-25 06:52:41,737 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-09-25 06:52:41,802 INFO L113 SettingsManager]: Loading preferences was successful
[2020-09-25 06:52:41,802 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-25 06:52:41,805 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-25 06:52:41,805 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-09-25 06:52:41,806 INFO L138 SettingsManager]: * Use SBE=true
[2020-09-25 06:52:41,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-25 06:52:41,807 INFO L138 SettingsManager]: * sizeof long=4
[2020-09-25 06:52:41,807 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-09-25 06:52:41,807 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-09-25 06:52:41,807 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-09-25 06:52:41,808 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-09-25 06:52:41,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-25 06:52:41,808 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-09-25 06:52:41,808 INFO L138 SettingsManager]: * sizeof long double=12
[2020-09-25 06:52:41,808 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-09-25 06:52:41,808 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-09-25 06:52:41,810 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-09-25 06:52:41,810 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-25 06:52:41,810 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-09-25 06:52:41,810 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-09-25 06:52:41,811 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-09-25 06:52:41,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-25 06:52:41,811 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-25 06:52:41,811 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-09-25 06:52:41,811 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-25 06:52:41,812 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-09-25 06:52:41,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-25 06:52:41,812 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-25 06:52:41,812 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-09-25 06:52:41,812 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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;
[2020-09-25 06:52:42,317 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-25 06:52:42,343 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-25 06:52:42,350 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-25 06:52:42,352 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-09-25 06:52:42,352 INFO L275 PluginConnector]: CDTParser initialized
[2020-09-25 06:52:42,353 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_2-2.c
[2020-09-25 06:52:42,449 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8af926d6a/ef4ff6fe0d9b44cc938a6c92efabfdfc/FLAG276c525f3
[2020-09-25 06:52:43,011 INFO L306 CDTParser]: Found 1 translation units.
[2020-09-25 06:52:43,012 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/simple_2-2.c
[2020-09-25 06:52:43,021 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8af926d6a/ef4ff6fe0d9b44cc938a6c92efabfdfc/FLAG276c525f3
[2020-09-25 06:52:43,350 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8af926d6a/ef4ff6fe0d9b44cc938a6c92efabfdfc
[2020-09-25 06:52:43,364 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-25 06:52:43,369 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-25 06:52:43,370 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-25 06:52:43,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-25 06:52:43,375 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-25 06:52:43,376 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:52:43" (1/1) ...
[2020-09-25 06:52:43,381 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aed4350 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:43, skipping insertion in model container
[2020-09-25 06:52:43,381 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:52:43" (1/1) ...
[2020-09-25 06:52:43,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-09-25 06:52:43,417 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-09-25 06:52:43,628 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-25 06:52:43,634 INFO L203 MainTranslator]: Completed pre-run
[2020-09-25 06:52:43,653 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-25 06:52:43,669 INFO L208 MainTranslator]: Completed translation
[2020-09-25 06:52:43,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:43 WrapperNode
[2020-09-25 06:52:43,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-25 06:52:43,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-25 06:52:43,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-25 06:52:43,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-09-25 06:52:43,685 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:43" (1/1) ...
[2020-09-25 06:52:43,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:43" (1/1) ...
[2020-09-25 06:52:43,690 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:43" (1/1) ...
[2020-09-25 06:52:43,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:43" (1/1) ...
[2020-09-25 06:52:43,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:43" (1/1) ...
[2020-09-25 06:52:43,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:43" (1/1) ...
[2020-09-25 06:52:43,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:43" (1/1) ...
[2020-09-25 06:52:43,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-25 06:52:43,784 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-25 06:52:43,784 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-09-25 06:52:43,784 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-09-25 06:52:43,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:43" (1/1) ...
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-25 06:52:43,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-25 06:52:43,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-25 06:52:43,867 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-09-25 06:52:43,867 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-09-25 06:52:43,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-25 06:52:43,868 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint
[2020-09-25 06:52:43,868 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-09-25 06:52:43,868 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-09-25 06:52:43,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-25 06:52:43,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-25 06:52:44,051 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-25 06:52:44,052 INFO L295 CfgBuilder]: Removed 1 assume(true) statements.
[2020-09-25 06:52:44,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:52:44 BoogieIcfgContainer
[2020-09-25 06:52:44,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-25 06:52:44,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-25 06:52:44,058 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-09-25 06:52:44,062 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-09-25 06:52:44,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 06:52:43" (1/3) ...
[2020-09-25 06:52:44,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@415f4341 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:52:44, skipping insertion in model container
[2020-09-25 06:52:44,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:43" (2/3) ...
[2020-09-25 06:52:44,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@415f4341 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:52:44, skipping insertion in model container
[2020-09-25 06:52:44,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:52:44" (3/3) ...
[2020-09-25 06:52:44,070 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_2-2.c
[2020-09-25 06:52:44,082 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-25 06:52:44,094 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-25 06:52:44,117 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-25 06:52:44,147 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-09-25 06:52:44,147 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-09-25 06:52:44,148 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-25 06:52:44,148 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-25 06:52:44,148 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-25 06:52:44,148 INFO L380 AbstractCegarLoop]: Difference is false
[2020-09-25 06:52:44,148 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-25 06:52:44,148 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-25 06:52:44,170 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states.
[2020-09-25 06:52:44,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2020-09-25 06:52:44,178 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 06:52:44,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 06:52:44,180 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 06:52:44,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 06:52:44,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1940560411, now seen corresponding path program 1 times
[2020-09-25 06:52:44,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 06:52:44,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930059189]
[2020-09-25 06:52:44,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 06:52:44,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 06:52:44,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 06:52:44,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 06:52:44,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20
[2020-09-25 06:52:44,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 06:52:44,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37
[2020-09-25 06:52:44,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 06:52:44,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6
[2020-09-25 06:52:44,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 06:52:44,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13
[2020-09-25 06:52:44,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 06:52:44,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3
[2020-09-25 06:52:44,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 06:52:44,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 06:52:44,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 06:52:44,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 06:52:44,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-25 06:52:44,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 06:52:44,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4
[2020-09-25 06:52:44,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 06:52:44,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6
[2020-09-25 06:52:44,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 06:52:44,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 06:52:44,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 06:52:44,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 06:52:44,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 06:52:44,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930059189]
[2020-09-25 06:52:44,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-25 06:52:44,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2020-09-25 06:52:44,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737749461]
[2020-09-25 06:52:44,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states
[2020-09-25 06:52:44,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 06:52:44,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2020-09-25 06:52:44,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-09-25 06:52:44,418 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states.
[2020-09-25 06:52:44,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 06:52:44,448 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions.
[2020-09-25 06:52:44,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states.
[2020-09-25 06:52:44,450 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11
[2020-09-25 06:52:44,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 06:52:44,461 INFO L225 Difference]: With dead ends: 32
[2020-09-25 06:52:44,462 INFO L226 Difference]: Without dead ends: 15
[2020-09-25 06:52:44,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-09-25 06:52:44,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states.
[2020-09-25 06:52:44,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15.
[2020-09-25 06:52:44,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states.
[2020-09-25 06:52:44,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions.
[2020-09-25 06:52:44,518 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11
[2020-09-25 06:52:44,519 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 06:52:44,519 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions.
[2020-09-25 06:52:44,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states.
[2020-09-25 06:52:44,519 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions.
[2020-09-25 06:52:44,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2020-09-25 06:52:44,520 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 06:52:44,520 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 06:52:44,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-25 06:52:44,521 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 06:52:44,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 06:52:44,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1947025058, now seen corresponding path program 1 times
[2020-09-25 06:52:44,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 06:52:44,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382755279]
[2020-09-25 06:52:44,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 06:52:44,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-09-25 06:52:44,562 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-09-25 06:52:44,563 INFO L520 BasicCegarLoop]: Counterexample might be feasible
[2020-09-25 06:52:44,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-25 06:52:44,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 06:52:44 BoogieIcfgContainer
[2020-09-25 06:52:44,589 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-09-25 06:52:44,594 INFO L168 Benchmark]: Toolchain (without parser) took 1226.04 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 102.5 MB in the beginning and 144.3 MB in the end (delta: -41.8 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB.
[2020-09-25 06:52:44,595 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 139.5 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
[2020-09-25 06:52:44,596 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.27 ms. Allocated memory is still 139.5 MB. Free memory was 101.8 MB in the beginning and 92.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB.
[2020-09-25 06:52:44,597 INFO L168 Benchmark]: Boogie Preprocessor took 112.82 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 92.6 MB in the beginning and 180.9 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB.
[2020-09-25 06:52:44,598 INFO L168 Benchmark]: RCFGBuilder took 273.08 ms. Allocated memory is still 201.9 MB. Free memory was 180.9 MB in the beginning and 169.1 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB.
[2020-09-25 06:52:44,599 INFO L168 Benchmark]: TraceAbstraction took 531.50 ms. Allocated memory is still 201.9 MB. Free memory was 169.1 MB in the beginning and 144.3 MB in the end (delta: 24.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB.
[2020-09-25 06:52:44,604 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.25 ms. Allocated memory is still 139.5 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 300.27 ms. Allocated memory is still 139.5 MB. Free memory was 101.8 MB in the beginning and 92.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 112.82 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 92.6 MB in the beginning and 180.9 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 273.08 ms. Allocated memory is still 201.9 MB. Free memory was 180.9 MB in the beginning and 169.1 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 531.50 ms. Allocated memory is still 201.9 MB. Free memory was 169.1 MB in the beginning and 144.3 MB in the end (delta: 24.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable
a call of __VERIFIER_error() is reachable
We found a FailurePath:
[L12] unsigned int x = __VERIFIER_nondet_uint();
[L14] COND FALSE !(x < 0x0fffffff)
[L18] CALL __VERIFIER_assert(x > 0x0fffffff)
[L5] COND TRUE !(cond)
[L6] __VERIFIER_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 4 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 21 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 100 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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...