/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/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/locks/test_locks_15-1.c


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


This is Ultimate 0.2.1-dev-36cd7be
[2021-02-24 04:17:42,870 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2021-02-24 04:17:42,930 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-02-24 04:17:42,932 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-02-24 04:17:42,934 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-02-24 04:17:42,937 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2021-02-24 04:17:42,939 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-02-24 04:17:42,943 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-02-24 04:17:42,944 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2021-02-24 04:17:42,946 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
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[2021-02-24 04:17:42,964 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2021-02-24 04:17:42,971 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf
[2021-02-24 04:17:42,997 INFO  L113        SettingsManager]: Loading preferences was successful
[2021-02-24 04:17:42,997 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2021-02-24 04:17:42,999 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-02-24 04:17:43,000 INFO  L138        SettingsManager]:  * sizeof long=4
[2021-02-24 04:17:43,000 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2021-02-24 04:17:43,000 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2021-02-24 04:17:43,001 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2021-02-24 04:17:43,001 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2021-02-24 04:17:43,001 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-02-24 04:17:43,002 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2021-02-24 04:17:43,002 INFO  L138        SettingsManager]:  * sizeof long double=12
[2021-02-24 04:17:43,002 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2021-02-24 04:17:43,003 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2021-02-24 04:17:43,003 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2021-02-24 04:17:43,003 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-02-24 04:17:43,003 INFO  L138        SettingsManager]:  * Size of a code block=SingleStatement
[2021-02-24 04:17:43,004 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2021-02-24 04:17:43,004 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2021-02-24 04:17:43,004 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-02-24 04:17:43,005 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-02-24 04:17:43,005 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2021-02-24 04:17:43,005 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-02-24 04:17:43,006 INFO  L138        SettingsManager]:  * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX
[2021-02-24 04:17:43,006 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2021-02-24 04:17:43,402 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2021-02-24 04:17:43,451 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-02-24 04:17:43,454 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-02-24 04:17:43,456 INFO  L271        PluginConnector]: Initializing CDTParser...
[2021-02-24 04:17:43,457 INFO  L275        PluginConnector]: CDTParser initialized
[2021-02-24 04:17:43,458 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_15-1.c
[2021-02-24 04:17:43,546 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0ccf0e05/eb70f56a81194a588d006f118ccb20ff/FLAGa2bd63d1a
[2021-02-24 04:17:44,146 INFO  L306              CDTParser]: Found 1 translation units.
[2021-02-24 04:17:44,146 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_15-1.c
[2021-02-24 04:17:44,156 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0ccf0e05/eb70f56a81194a588d006f118ccb20ff/FLAGa2bd63d1a
[2021-02-24 04:17:44,514 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0ccf0e05/eb70f56a81194a588d006f118ccb20ff
[2021-02-24 04:17:44,520 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-02-24 04:17:44,536 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2021-02-24 04:17:44,540 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-02-24 04:17:44,540 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-02-24 04:17:44,545 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2021-02-24 04:17:44,546 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:17:44" (1/1) ...
[2021-02-24 04:17:44,547 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29bbf851 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:17:44, skipping insertion in model container
[2021-02-24 04:17:44,547 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:17:44" (1/1) ...
[2021-02-24 04:17:44,557 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2021-02-24 04:17:44,599 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2021-02-24 04:17:44,782 WARN  L226   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_15-1.c[5654,5667]
[2021-02-24 04:17:44,796 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2021-02-24 04:17:44,813 INFO  L203         MainTranslator]: Completed pre-run
[2021-02-24 04:17:44,888 WARN  L226   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_15-1.c[5654,5667]
[2021-02-24 04:17:44,893 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2021-02-24 04:17:44,933 INFO  L208         MainTranslator]: Completed translation
[2021-02-24 04:17:44,934 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:17:44 WrapperNode
[2021-02-24 04:17:44,934 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-02-24 04:17:44,935 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-02-24 04:17:44,935 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2021-02-24 04:17:44,935 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2021-02-24 04:17:44,954 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:17:44" (1/1) ...
[2021-02-24 04:17:44,954 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:17:44" (1/1) ...
[2021-02-24 04:17:44,963 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:17:44" (1/1) ...
[2021-02-24 04:17:44,963 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:17:44" (1/1) ...
[2021-02-24 04:17:44,973 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:17:44" (1/1) ...
[2021-02-24 04:17:44,992 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:17:44" (1/1) ...
[2021-02-24 04:17:44,996 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:17:44" (1/1) ...
[2021-02-24 04:17:45,000 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-02-24 04:17:45,012 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-02-24 04:17:45,012 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2021-02-24 04:17:45,012 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2021-02-24 04:17:45,013 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:17:44" (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
[2021-02-24 04:17:45,117 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2021-02-24 04:17:45,118 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-02-24 04:17:45,118 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2021-02-24 04:17:45,118 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2021-02-24 04:17:45,118 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2021-02-24 04:17:45,118 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2021-02-24 04:17:45,119 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2021-02-24 04:17:45,119 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-02-24 04:17:45,119 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2021-02-24 04:17:45,120 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2021-02-24 04:17:45,120 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2021-02-24 04:17:45,121 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2021-02-24 04:17:45,121 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-02-24 04:17:45,122 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2021-02-24 04:17:45,123 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2021-02-24 04:17:45,123 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-02-24 04:17:45,697 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-02-24 04:17:45,698 INFO  L299             CfgBuilder]: Removed 1 assume(true) statements.
[2021-02-24 04:17:45,700 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:17:45 BoogieIcfgContainer
[2021-02-24 04:17:45,700 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-02-24 04:17:45,702 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-02-24 04:17:45,703 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2021-02-24 04:17:45,707 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2021-02-24 04:17:45,707 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:17:44" (1/3) ...
[2021-02-24 04:17:45,708 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b0630 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:17:45, skipping insertion in model container
[2021-02-24 04:17:45,708 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:17:44" (2/3) ...
[2021-02-24 04:17:45,709 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b0630 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:17:45, skipping insertion in model container
[2021-02-24 04:17:45,709 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:17:45" (3/3) ...
[2021-02-24 04:17:45,711 INFO  L111   eAbstractionObserver]: Analyzing ICFG test_locks_15-1.c
[2021-02-24 04:17:45,719 INFO  L153   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2021-02-24 04:17:45,725 INFO  L165   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2021-02-24 04:17:45,746 INFO  L253      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-02-24 04:17:45,773 INFO  L376      AbstractCegarLoop]: Interprodecural is true
[2021-02-24 04:17:45,773 INFO  L377      AbstractCegarLoop]: Hoare is true
[2021-02-24 04:17:45,773 INFO  L378      AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation
[2021-02-24 04:17:45,773 INFO  L379      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2021-02-24 04:17:45,774 INFO  L380      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2021-02-24 04:17:45,774 INFO  L381      AbstractCegarLoop]: Difference is false
[2021-02-24 04:17:45,774 INFO  L382      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2021-02-24 04:17:45,774 INFO  L386      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2021-02-24 04:17:45,795 INFO  L276                IsEmpty]: Start isEmpty. Operand 177 states.
[2021-02-24 04:17:45,822 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 112
[2021-02-24 04:17:45,823 INFO  L414         BasicCegarLoop]: Found error trace
[2021-02-24 04:17:45,825 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-02-24 04:17:45,826 INFO  L428      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-24 04:17:45,832 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-02-24 04:17:45,833 INFO  L82        PathProgramCache]: Analyzing trace with hash -733530489, now seen corresponding path program 1 times
[2021-02-24 04:17:45,841 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-24 04:17:45,842 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412318288]
[2021-02-24 04:17:45,842 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-24 04:17:45,923 INFO  L218   tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-02-24 04:17:46,101 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-24 04:17:46,264 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 04:17:46,265 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-24 04:17:46,268 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 04:17:46,268 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3
[2021-02-24 04:17:46,283 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 04:17:46,283 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-24 04:17:46,320 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-02-24 04:17:46,332 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-24 04:17:46,354 WARN  L141       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-24 04:17:46,356 WARN  L147       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-24 04:17:46,398 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-02-24 04:17:46,400 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412318288]
[2021-02-24 04:17:46,403 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-02-24 04:17:46,403 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2021-02-24 04:17:46,404 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118099816]
[2021-02-24 04:17:46,414 INFO  L460      AbstractCegarLoop]: Interpolant automaton has 4 states
[2021-02-24 04:17:46,415 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-02-24 04:17:46,433 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2021-02-24 04:17:46,434 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2021-02-24 04:17:46,437 INFO  L87              Difference]: Start difference. First operand 177 states. Second operand 4 states.
[2021-02-24 04:17:47,262 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-02-24 04:17:47,262 INFO  L93              Difference]: Finished difference Result 376 states and 517 transitions.
[2021-02-24 04:17:47,262 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2021-02-24 04:17:47,264 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 111
[2021-02-24 04:17:47,266 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-02-24 04:17:47,297 INFO  L225             Difference]: With dead ends: 376
[2021-02-24 04:17:47,297 INFO  L226             Difference]: Without dead ends: 264
[2021-02-24 04:17:47,301 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2021-02-24 04:17:47,320 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 264 states.
[2021-02-24 04:17:47,456 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 262.
[2021-02-24 04:17:47,458 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 262 states.
[2021-02-24 04:17:47,462 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 348 transitions.
[2021-02-24 04:17:47,465 INFO  L78                 Accepts]: Start accepts. Automaton has 262 states and 348 transitions. Word has length 111
[2021-02-24 04:17:47,466 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-02-24 04:17:47,467 INFO  L480      AbstractCegarLoop]: Abstraction has 262 states and 348 transitions.
[2021-02-24 04:17:47,467 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2021-02-24 04:17:47,467 INFO  L276                IsEmpty]: Start isEmpty. Operand 262 states and 348 transitions.
[2021-02-24 04:17:47,477 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 112
[2021-02-24 04:17:47,478 INFO  L414         BasicCegarLoop]: Found error trace
[2021-02-24 04:17:47,478 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-02-24 04:17:47,479 WARN  L517      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-02-24 04:17:47,481 INFO  L428      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-24 04:17:47,481 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-02-24 04:17:47,482 INFO  L82        PathProgramCache]: Analyzing trace with hash -733522274, now seen corresponding path program 1 times
[2021-02-24 04:17:47,482 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-24 04:17:47,482 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131830381]
[2021-02-24 04:17:47,483 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-24 04:17:47,492 INFO  L218   tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-02-24 04:17:47,573 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-02-24 04:17:47,573 INFO  L223             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2021-02-24 04:17:47,630 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-02-24 04:17:47,630 INFO  L223             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2021-02-24 04:17:47,688 INFO  L173   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2021-02-24 04:17:47,689 INFO  L523         BasicCegarLoop]: Counterexample might be feasible
[2021-02-24 04:17:47,690 WARN  L517      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-02-24 04:17:47,711 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:17:47 BoogieIcfgContainer
[2021-02-24 04:17:47,711 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-02-24 04:17:47,713 INFO  L168              Benchmark]: Toolchain (without parser) took 3190.99 ms. Allocated memory was 151.0 MB in the beginning and 182.5 MB in the end (delta: 31.5 MB). Free memory was 128.4 MB in the beginning and 142.3 MB in the end (delta: -14.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 8.0 GB.
[2021-02-24 04:17:47,714 INFO  L168              Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory is still 127.7 MB. There was no memory consumed. Max. memory is 8.0 GB.
[2021-02-24 04:17:47,715 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 394.17 ms. Allocated memory is still 151.0 MB. Free memory was 127.3 MB in the beginning and 116.2 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB.
[2021-02-24 04:17:47,716 INFO  L168              Benchmark]: Boogie Preprocessor took 65.21 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 114.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
[2021-02-24 04:17:47,717 INFO  L168              Benchmark]: RCFGBuilder took 689.03 ms. Allocated memory is still 151.0 MB. Free memory was 114.3 MB in the beginning and 113.4 MB in the end (delta: 859.4 kB). Peak memory consumption was 18.0 MB. Max. memory is 8.0 GB.
[2021-02-24 04:17:47,718 INFO  L168              Benchmark]: TraceAbstraction took 2008.84 ms. Allocated memory was 151.0 MB in the beginning and 182.5 MB in the end (delta: 31.5 MB). Free memory was 113.4 MB in the beginning and 142.3 MB in the end (delta: -28.9 MB). Peak memory consumption was 2.0 MB. Max. memory is 8.0 GB.
[2021-02-24 04:17:47,721 INFO  L339   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory is still 127.7 MB. There was no memory consumed. Max. memory is 8.0 GB.
 * CACSL2BoogieTranslator took 394.17 ms. Allocated memory is still 151.0 MB. Free memory was 127.3 MB in the beginning and 116.2 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB.
 * Boogie Preprocessor took 65.21 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 114.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
 * RCFGBuilder took 689.03 ms. Allocated memory is still 151.0 MB. Free memory was 114.3 MB in the beginning and 113.4 MB in the end (delta: 859.4 kB). Peak memory consumption was 18.0 MB. Max. memory is 8.0 GB.
 * TraceAbstraction took 2008.84 ms. Allocated memory was 151.0 MB in the beginning and 182.5 MB in the end (delta: 31.5 MB). Free memory was 113.4 MB in the beginning and 142.3 MB in the end (delta: -28.9 MB). Peak memory consumption was 2.0 MB. Max. memory is 8.0 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - CounterExampleResult [Line: 233]: a call to reach_error is reachable
    a call to reach_error is reachable
We found a FailurePath: 
[L8]                int p1 = __VERIFIER_nondet_int();
[L9]                int lk1;
[L11]               int p2 = __VERIFIER_nondet_int();
[L12]               int lk2;
[L14]               int p3 = __VERIFIER_nondet_int();
[L15]               int lk3;
[L17]               int p4 = __VERIFIER_nondet_int();
[L18]               int lk4;
[L20]               int p5 = __VERIFIER_nondet_int();
[L21]               int lk5;
[L23]               int p6 = __VERIFIER_nondet_int();
[L24]               int lk6;
[L26]               int p7 = __VERIFIER_nondet_int();
[L27]               int lk7;
[L29]               int p8 = __VERIFIER_nondet_int();
[L30]               int lk8;
[L32]               int p9 = __VERIFIER_nondet_int();
[L33]               int lk9;
[L35]               int p10 = __VERIFIER_nondet_int();
[L36]               int lk10;
[L38]               int p11 = __VERIFIER_nondet_int();
[L39]               int lk11;
[L41]               int p12 = __VERIFIER_nondet_int();
[L42]               int lk12;
[L44]               int p13 = __VERIFIER_nondet_int();
[L45]               int lk13;
[L47]               int p14 = __VERIFIER_nondet_int();
[L48]               int lk14;
[L50]               int p15 = __VERIFIER_nondet_int();
[L51]               int lk15;
[L54]               int cond;
[L56]   COND TRUE   1
[L57]               cond = __VERIFIER_nondet_int()
[L58]   COND FALSE  !(cond == 0)
[L61]               lk1 = 0
[L63]               lk2 = 0
[L65]               lk3 = 0
[L67]               lk4 = 0
[L69]               lk5 = 0
[L71]               lk6 = 0
[L73]               lk7 = 0
[L75]               lk8 = 0
[L77]               lk9 = 0
[L79]               lk10 = 0
[L81]               lk11 = 0
[L83]               lk12 = 0
[L85]               lk13 = 0
[L87]               lk14 = 0
[L89]               lk15 = 0
[L93]   COND FALSE  !(p1 != 0)
[L97]   COND FALSE  !(p2 != 0)
[L101]  COND FALSE  !(p3 != 0)
[L105]  COND FALSE  !(p4 != 0)
[L109]  COND FALSE  !(p5 != 0)
[L113]  COND FALSE  !(p6 != 0)
[L117]  COND FALSE  !(p7 != 0)
[L121]  COND FALSE  !(p8 != 0)
[L125]  COND FALSE  !(p9 != 0)
[L129]  COND FALSE  !(p10 != 0)
[L133]  COND FALSE  !(p11 != 0)
[L137]  COND FALSE  !(p12 != 0)
[L141]  COND FALSE  !(p13 != 0)
[L145]  COND FALSE  !(p14 != 0)
[L149]  COND FALSE  !(p15 != 0)
[L155]  COND FALSE  !(p1 != 0)
[L160]  COND FALSE  !(p2 != 0)
[L233]              reach_error()

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 4 procedures, 180 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 242 SDtfs, 442 SDslu, 19 SDs, 0 SdLazy, 214 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=262occurred in iteration=1, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 1 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 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...