/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/test06.c
--------------------------------------------------------------------------------
This is Ultimate 0.2.1-dev-b7b32d2
[2021-02-21 20:38:35,171 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2021-02-21 20:38:35,174 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2021-02-21 20:38:35,212 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-02-21 20:38:35,212 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-02-21 20:38:35,214 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-02-21 20:38:35,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-02-21 20:38:35,218 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2021-02-21 20:38:35,220 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2021-02-21 20:38:35,222 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2021-02-21 20:38:35,223 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2021-02-21 20:38:35,224 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2021-02-21 20:38:35,225 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2021-02-21 20:38:35,226 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2021-02-21 20:38:35,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-02-21 20:38:35,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-02-21 20:38:35,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-02-21 20:38:35,232 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-02-21 20:38:35,234 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-02-21 20:38:35,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2021-02-21 20:38:35,238 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-02-21 20:38:35,240 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-02-21 20:38:35,241 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2021-02-21 20:38:35,242 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2021-02-21 20:38:35,261 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2021-02-21 20:38:35,272 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
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[2021-02-21 20:38:35,275 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2021-02-21 20:38:35,279 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf
[2021-02-21 20:38:35,291 INFO L113 SettingsManager]: Loading preferences was successful
[2021-02-21 20:38:35,292 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2021-02-21 20:38:35,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-02-21 20:38:35,294 INFO L138 SettingsManager]: * sizeof long=4
[2021-02-21 20:38:35,294 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2021-02-21 20:38:35,294 INFO L138 SettingsManager]: * sizeof POINTER=4
[2021-02-21 20:38:35,295 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2021-02-21 20:38:35,295 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2021-02-21 20:38:35,295 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-02-21 20:38:35,295 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2021-02-21 20:38:35,296 INFO L138 SettingsManager]: * sizeof long double=12
[2021-02-21 20:38:35,296 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2021-02-21 20:38:35,296 INFO L138 SettingsManager]: * Use constant arrays=true
[2021-02-21 20:38:35,297 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2021-02-21 20:38:35,297 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-02-21 20:38:35,297 INFO L138 SettingsManager]: * Size of a code block=SingleStatement
[2021-02-21 20:38:35,298 INFO L138 SettingsManager]: * To the following directory=./dump/
[2021-02-21 20:38:35,298 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2021-02-21 20:38:35,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-02-21 20:38:35,299 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-02-21 20:38:35,299 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2021-02-21 20:38:35,299 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-02-21 20:38:35,299 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2021-02-21 20:38:35,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2021-02-21 20:38:35,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-02-21 20:38:35,714 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-02-21 20:38:35,715 INFO L271 PluginConnector]: Initializing CDTParser...
[2021-02-21 20:38:35,716 INFO L275 PluginConnector]: CDTParser initialized
[2021-02-21 20:38:35,717 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test06.c
[2021-02-21 20:38:35,816 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccf353239/da15dd68039e4a77a3fa8f97980fb9b1/FLAG216346d98
[2021-02-21 20:38:36,490 INFO L306 CDTParser]: Found 1 translation units.
[2021-02-21 20:38:36,491 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test06.c
[2021-02-21 20:38:36,501 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccf353239/da15dd68039e4a77a3fa8f97980fb9b1/FLAG216346d98
[2021-02-21 20:38:36,872 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccf353239/da15dd68039e4a77a3fa8f97980fb9b1
[2021-02-21 20:38:36,876 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-02-21 20:38:36,892 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2021-02-21 20:38:36,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-02-21 20:38:36,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-02-21 20:38:36,902 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2021-02-21 20:38:36,903 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:38:36" (1/1) ...
[2021-02-21 20:38:36,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25d71a5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:38:36, skipping insertion in model container
[2021-02-21 20:38:36,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:38:36" (1/1) ...
[2021-02-21 20:38:36,915 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2021-02-21 20:38:36,935 INFO L178 MainTranslator]: Built tables and reachable declarations
[2021-02-21 20:38:37,151 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test06.c[670,683]
[2021-02-21 20:38:37,157 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-02-21 20:38:37,175 INFO L203 MainTranslator]: Completed pre-run
[2021-02-21 20:38:37,194 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test06.c[670,683]
[2021-02-21 20:38:37,195 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-02-21 20:38:37,214 INFO L208 MainTranslator]: Completed translation
[2021-02-21 20:38:37,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:38:37 WrapperNode
[2021-02-21 20:38:37,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-02-21 20:38:37,216 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-02-21 20:38:37,216 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2021-02-21 20:38:37,216 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2021-02-21 20:38:37,230 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:38:37" (1/1) ...
[2021-02-21 20:38:37,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:38:37" (1/1) ...
[2021-02-21 20:38:37,241 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:38:37" (1/1) ...
[2021-02-21 20:38:37,241 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:38:37" (1/1) ...
[2021-02-21 20:38:37,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:38:37" (1/1) ...
[2021-02-21 20:38:37,253 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:38:37" (1/1) ...
[2021-02-21 20:38:37,255 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:38:37" (1/1) ...
[2021-02-21 20:38:37,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-02-21 20:38:37,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-02-21 20:38:37,260 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2021-02-21 20:38:37,260 INFO L275 PluginConnector]: RCFGBuilder initialized
[2021-02-21 20:38:37,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:38:37" (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
[2021-02-21 20:38:37,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2021-02-21 20:38:37,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-02-21 20:38:37,376 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error
[2021-02-21 20:38:37,376 INFO L138 BoogieDeclarations]: Found implementation of procedure g
[2021-02-21 20:38:37,376 INFO L138 BoogieDeclarations]: Found implementation of procedure f
[2021-02-21 20:38:37,376 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2021-02-21 20:38:37,376 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2021-02-21 20:38:37,377 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail
[2021-02-21 20:38:37,377 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error
[2021-02-21 20:38:37,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-02-21 20:38:37,377 INFO L130 BoogieDeclarations]: Found specification of procedure g
[2021-02-21 20:38:37,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2021-02-21 20:38:37,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2021-02-21 20:38:37,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2021-02-21 20:38:37,378 INFO L130 BoogieDeclarations]: Found specification of procedure f
[2021-02-21 20:38:37,378 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2021-02-21 20:38:37,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2021-02-21 20:38:37,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-02-21 20:38:37,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2021-02-21 20:38:37,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2021-02-21 20:38:37,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-02-21 20:38:37,927 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-02-21 20:38:37,928 INFO L299 CfgBuilder]: Removed 0 assume(true) statements.
[2021-02-21 20:38:37,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:38:37 BoogieIcfgContainer
[2021-02-21 20:38:37,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-02-21 20:38:37,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-02-21 20:38:37,932 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2021-02-21 20:38:37,936 INFO L275 PluginConnector]: TraceAbstraction initialized
[2021-02-21 20:38:37,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 08:38:36" (1/3) ...
[2021-02-21 20:38:37,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@398728a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:38:37, skipping insertion in model container
[2021-02-21 20:38:37,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:38:37" (2/3) ...
[2021-02-21 20:38:37,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@398728a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:38:37, skipping insertion in model container
[2021-02-21 20:38:37,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:38:37" (3/3) ...
[2021-02-21 20:38:37,941 INFO L111 eAbstractionObserver]: Analyzing ICFG test06.c
[2021-02-21 20:38:37,950 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2021-02-21 20:38:37,956 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2021-02-21 20:38:37,977 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-02-21 20:38:38,002 INFO L376 AbstractCegarLoop]: Interprodecural is true
[2021-02-21 20:38:38,003 INFO L377 AbstractCegarLoop]: Hoare is true
[2021-02-21 20:38:38,003 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation
[2021-02-21 20:38:38,003 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2021-02-21 20:38:38,003 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2021-02-21 20:38:38,003 INFO L381 AbstractCegarLoop]: Difference is false
[2021-02-21 20:38:38,003 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2021-02-21 20:38:38,004 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2021-02-21 20:38:38,021 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states.
[2021-02-21 20:38:38,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45
[2021-02-21 20:38:38,032 INFO L414 BasicCegarLoop]: Found error trace
[2021-02-21 20:38:38,033 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]
[2021-02-21 20:38:38,034 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-21 20:38:38,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-02-21 20:38:38,041 INFO L82 PathProgramCache]: Analyzing trace with hash -540717432, now seen corresponding path program 1 times
[2021-02-21 20:38:38,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-21 20:38:38,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486191435]
[2021-02-21 20:38:38,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-21 20:38:38,140 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-02-21 20:38:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-21 20:38:38,518 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 20:38:38,520 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-21 20:38:38,521 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 20:38:38,523 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7
[2021-02-21 20:38:38,541 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 20:38:38,542 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3
[2021-02-21 20:38:38,565 WARN L141 QuantifierPusher]: treesize reduction 8, result has 27.3 percent of original size
[2021-02-21 20:38:38,567 WARN L147 QuantifierPusher]: treesize reduction 8, result has 27.3 percent of original size 3
[2021-02-21 20:38:38,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 20:38:38,583 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7
[2021-02-21 20:38:38,607 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 20:38:38,608 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3
[2021-02-21 20:38:38,626 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 20:38:38,627 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-21 20:38:38,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-02-21 20:38:38,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-21 20:38:38,711 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 20:38:38,712 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-21 20:38:38,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26
[2021-02-21 20:38:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-21 20:38:38,760 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 20:38:38,762 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3
[2021-02-21 20:38:38,796 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 20:38:38,797 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4
[2021-02-21 20:38:38,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-02-21 20:38:38,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486191435]
[2021-02-21 20:38:38,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-02-21 20:38:38,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11
[2021-02-21 20:38:38,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396686157]
[2021-02-21 20:38:38,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states
[2021-02-21 20:38:38,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-02-21 20:38:38,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2021-02-21 20:38:38,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110
[2021-02-21 20:38:38,875 INFO L87 Difference]: Start difference. First operand 83 states. Second operand 11 states.
[2021-02-21 20:38:39,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-02-21 20:38:39,711 INFO L93 Difference]: Finished difference Result 111 states and 112 transitions.
[2021-02-21 20:38:39,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states.
[2021-02-21 20:38:39,713 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44
[2021-02-21 20:38:39,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-02-21 20:38:39,724 INFO L225 Difference]: With dead ends: 111
[2021-02-21 20:38:39,724 INFO L226 Difference]: Without dead ends: 57
[2021-02-21 20:38:39,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380
[2021-02-21 20:38:39,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states.
[2021-02-21 20:38:39,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57.
[2021-02-21 20:38:39,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states.
[2021-02-21 20:38:39,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 56 transitions.
[2021-02-21 20:38:39,784 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 56 transitions. Word has length 44
[2021-02-21 20:38:39,784 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-02-21 20:38:39,785 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 56 transitions.
[2021-02-21 20:38:39,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states.
[2021-02-21 20:38:39,785 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 56 transitions.
[2021-02-21 20:38:39,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2021-02-21 20:38:39,787 INFO L414 BasicCegarLoop]: Found error trace
[2021-02-21 20:38:39,787 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, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-02-21 20:38:39,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-02-21 20:38:39,788 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-21 20:38:39,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-02-21 20:38:39,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1846319629, now seen corresponding path program 1 times
[2021-02-21 20:38:39,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-21 20:38:39,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175220926]
[2021-02-21 20:38:39,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-21 20:38:39,793 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-02-21 20:38:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-02-21 20:38:39,895 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2021-02-21 20:38:39,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-02-21 20:38:39,997 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2021-02-21 20:38:40,075 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2021-02-21 20:38:40,075 INFO L523 BasicCegarLoop]: Counterexample might be feasible
[2021-02-21 20:38:40,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-02-21 20:38:40,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 08:38:40 BoogieIcfgContainer
[2021-02-21 20:38:40,098 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-02-21 20:38:40,100 INFO L168 Benchmark]: Toolchain (without parser) took 3221.35 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 128.8 MB in the beginning and 160.8 MB in the end (delta: -32.0 MB). Peak memory consumption was 81.2 MB. Max. memory is 8.0 GB.
[2021-02-21 20:38:40,101 INFO L168 Benchmark]: CDTParser took 0.52 ms. Allocated memory is still 152.0 MB. Free memory was 127.4 MB in the beginning and 127.3 MB in the end (delta: 82.8 kB). There was no memory consumed. Max. memory is 8.0 GB.
[2021-02-21 20:38:40,102 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.96 ms. Allocated memory is still 152.0 MB. Free memory was 127.6 MB in the beginning and 118.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB.
[2021-02-21 20:38:40,103 INFO L168 Benchmark]: Boogie Preprocessor took 42.94 ms. Allocated memory is still 152.0 MB. Free memory was 118.1 MB in the beginning and 116.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB.
[2021-02-21 20:38:40,104 INFO L168 Benchmark]: RCFGBuilder took 670.83 ms. Allocated memory is still 152.0 MB. Free memory was 116.5 MB in the beginning and 125.8 MB in the end (delta: -9.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB.
[2021-02-21 20:38:40,105 INFO L168 Benchmark]: TraceAbstraction took 2165.90 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 125.8 MB in the beginning and 160.8 MB in the end (delta: -35.0 MB). Peak memory consumption was 78.2 MB. Max. memory is 8.0 GB.
[2021-02-21 20:38:40,109 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.52 ms. Allocated memory is still 152.0 MB. Free memory was 127.4 MB in the beginning and 127.3 MB in the end (delta: 82.8 kB). There was no memory consumed. Max. memory is 8.0 GB.
* CACSL2BoogieTranslator took 317.96 ms. Allocated memory is still 152.0 MB. Free memory was 127.6 MB in the beginning and 118.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB.
* Boogie Preprocessor took 42.94 ms. Allocated memory is still 152.0 MB. Free memory was 118.1 MB in the beginning and 116.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB.
* RCFGBuilder took 670.83 ms. Allocated memory is still 152.0 MB. Free memory was 116.5 MB in the beginning and 125.8 MB in the end (delta: -9.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB.
* TraceAbstraction took 2165.90 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 125.8 MB in the beginning and 160.8 MB in the end (delta: -35.0 MB). Peak memory consumption was 78.2 MB. Max. memory is 8.0 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- CounterExampleResult [Line: 42]: a call to reach_error is reachable
a call to reach_error is reachable
We found a FailurePath:
[L23] int a, b;
[L24] int *p1, *p2;
[L26] p1 = &a
[L27] p2 = &b
[L29] b = 1
[L30] a = 5
[L32] EXPR \read(a)
[L32] a--
[L34] EXPR \read(a)
[L34] CALL, EXPR f(a, &p1, &p2)
[L14] COND TRUE a == 4
[L15] CALL g(p1, p2)
[L7] EXPR \read(**p2)
[L7] int *pq = *p2;
[L9] EXPR \read(**p2)
[L9] *p1 = *p2
[L10] *pq = 0
[L15] RET g(p1, p2)
[L16] return 1;
[L34] RET, EXPR f(a, &p1, &p2)
[L34] a = f(a, &p1, &p2)
[L36] EXPR \read(*p1)
[L36] COND TRUE *p1 == 0
[L42] reach_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 6 procedures, 86 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 58 SDtfs, 56 SDslu, 263 SDs, 0 SdLazy, 329 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred 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: 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...