/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.p+cfa-reducer.c
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This is Ultimate 0.1.25-d623d84
[2020-07-20 12:02:42,766 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-07-20 12:02:42,769 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 12:02:42,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 12:02:42,786 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 12:02:42,787 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 12:02:42,789 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-20 12:02:42,791 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-20 12:02:42,793 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-20 12:02:42,795 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-20 12:02:42,796 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-07-20 12:02:42,798 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-20 12:02:42,798 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 12:02:42,800 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 12:02:42,801 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 12:02:42,803 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 12:02:42,804 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 12:02:42,805 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 12:02:42,807 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 12:02:42,810 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 12:02:42,812 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 12:02:42,813 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 12:02:42,815 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 12:02:42,816 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 12:02:42,819 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2020-07-20 12:02:42,825 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
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[2020-07-20 12:02:42,827 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
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[2020-07-20 12:02:42,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 12:02:42,831 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-07-20 12:02:42,847 INFO L113 SettingsManager]: Loading preferences was successful
[2020-07-20 12:02:42,847 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 12:02:42,848 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 12:02:42,849 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-07-20 12:02:42,849 INFO L138 SettingsManager]: * Use SBE=true
[2020-07-20 12:02:42,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 12:02:42,849 INFO L138 SettingsManager]: * sizeof long=4
[2020-07-20 12:02:42,850 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-07-20 12:02:42,850 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-07-20 12:02:42,850 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-07-20 12:02:42,850 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 12:02:42,850 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 12:02:42,851 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 12:02:42,851 INFO L138 SettingsManager]: * sizeof long double=12
[2020-07-20 12:02:42,851 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-07-20 12:02:42,851 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-07-20 12:02:42,851 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-07-20 12:02:42,852 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 12:02:42,852 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-07-20 12:02:42,852 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-07-20 12:02:42,852 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-07-20 12:02:42,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 12:02:42,853 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 12:02:42,853 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 12:02:42,853 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 12:02:42,853 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-07-20 12:02:42,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 12:02:42,854 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 12:02:42,854 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-07-20 12:02:42,854 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 -> FPandBPonlyIfFpWasNotPerfect
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY
[2020-07-20 12:02:43,179 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 12:02:43,202 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 12:02:43,207 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 12:02:43,209 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-07-20 12:02:43,210 INFO L275 PluginConnector]: CDTParser initialized
[2020-07-20 12:02:43,210 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.p+cfa-reducer.c
[2020-07-20 12:02:43,305 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf0fc0e67/44f9a9ee9e1242f18868ed07913195af/FLAGe22b0a780
[2020-07-20 12:02:43,863 INFO L306 CDTParser]: Found 1 translation units.
[2020-07-20 12:02:43,864 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.c.i.p+cfa-reducer.c
[2020-07-20 12:02:43,871 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf0fc0e67/44f9a9ee9e1242f18868ed07913195af/FLAGe22b0a780
[2020-07-20 12:02:44,291 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf0fc0e67/44f9a9ee9e1242f18868ed07913195af
[2020-07-20 12:02:44,304 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 12:02:44,308 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 12:02:44,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 12:02:44,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 12:02:44,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 12:02:44,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:02:44" (1/1) ...
[2020-07-20 12:02:44,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b58d8f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:44, skipping insertion in model container
[2020-07-20 12:02:44,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:02:44" (1/1) ...
[2020-07-20 12:02:44,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-07-20 12:02:44,357 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-07-20 12:02:44,574 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-07-20 12:02:44,580 INFO L203 MainTranslator]: Completed pre-run
[2020-07-20 12:02:44,600 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-07-20 12:02:44,613 INFO L208 MainTranslator]: Completed translation
[2020-07-20 12:02:44,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:44 WrapperNode
[2020-07-20 12:02:44,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 12:02:44,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 12:02:44,615 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 12:02:44,615 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 12:02:44,630 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:44" (1/1) ...
[2020-07-20 12:02:44,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:44" (1/1) ...
[2020-07-20 12:02:44,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:44" (1/1) ...
[2020-07-20 12:02:44,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:44" (1/1) ...
[2020-07-20 12:02:44,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:44" (1/1) ...
[2020-07-20 12:02:44,729 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:44" (1/1) ...
[2020-07-20 12:02:44,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:44" (1/1) ...
[2020-07-20 12:02:44,735 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 12:02:44,738 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 12:02:44,738 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 12:02:44,738 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-07-20 12:02:44,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:44" (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
[2020-07-20 12:02:44,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 12:02:44,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 12:02:44,804 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-07-20 12:02:44,804 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 12:02:44,804 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 12:02:44,804 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2020-07-20 12:02:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-07-20 12:02:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-07-20 12:02:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-07-20 12:02:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-07-20 12:02:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 12:02:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 12:02:45,024 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 12:02:45,025 INFO L295 CfgBuilder]: Removed 0 assume(true) statements.
[2020-07-20 12:02:45,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:02:45 BoogieIcfgContainer
[2020-07-20 12:02:45,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 12:02:45,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 12:02:45,033 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 12:02:45,037 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-07-20 12:02:45,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 12:02:44" (1/3) ...
[2020-07-20 12:02:45,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@446247e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:02:45, skipping insertion in model container
[2020-07-20 12:02:45,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:44" (2/3) ...
[2020-07-20 12:02:45,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@446247e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:02:45, skipping insertion in model container
[2020-07-20 12:02:45,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:02:45" (3/3) ...
[2020-07-20 12:02:45,049 INFO L109 eAbstractionObserver]: Analyzing ICFG gsv2008.c.i.p+cfa-reducer.c
[2020-07-20 12:02:45,063 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-20 12:02:45,072 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 12:02:45,099 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 12:02:45,139 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-07-20 12:02:45,139 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-07-20 12:02:45,139 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-20 12:02:45,140 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 12:02:45,140 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 12:02:45,141 INFO L380 AbstractCegarLoop]: Difference is false
[2020-07-20 12:02:45,141 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 12:02:45,141 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 12:02:45,164 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states.
[2020-07-20 12:02:45,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2020-07-20 12:02:45,171 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 12:02:45,172 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 12:02:45,173 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 12:02:45,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 12:02:45,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1330899215, now seen corresponding path program 1 times
[2020-07-20 12:02:45,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 12:02:45,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431674975]
[2020-07-20 12:02:45,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 12:02:45,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 12:02:45,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-20 12:02:45,262 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 12:02:45,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 12:02:45,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 12:02:45,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431674975]
[2020-07-20 12:02:45,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 12:02:45,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 12:02:45,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913470914]
[2020-07-20 12:02:45,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 12:02:45,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 12:02:45,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 12:02:45,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 12:02:45,341 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 3 states.
[2020-07-20 12:02:45,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 12:02:45,373 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions.
[2020-07-20 12:02:45,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 12:02:45,375 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11
[2020-07-20 12:02:45,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 12:02:45,385 INFO L225 Difference]: With dead ends: 26
[2020-07-20 12:02:45,385 INFO L226 Difference]: Without dead ends: 13
[2020-07-20 12:02:45,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 12:02:45,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states.
[2020-07-20 12:02:45,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13.
[2020-07-20 12:02:45,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states.
[2020-07-20 12:02:45,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions.
[2020-07-20 12:02:45,425 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11
[2020-07-20 12:02:45,426 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 12:02:45,426 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions.
[2020-07-20 12:02:45,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 12:02:45,426 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions.
[2020-07-20 12:02:45,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2020-07-20 12:02:45,427 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 12:02:45,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 12:02:45,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 12:02:45,643 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 12:02:45,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 12:02:45,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1691859760, now seen corresponding path program 1 times
[2020-07-20 12:02:45,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 12:02:45,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459634349]
[2020-07-20 12:02:45,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 12:02:45,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 12:02:45,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core
[2020-07-20 12:02:45,685 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 12:02:45,721 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 12:02:45,726 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 12:02:45,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 12:02:45,741 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 12:02:45,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 12:02:45,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 12:02:45,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459634349]
[2020-07-20 12:02:45,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 12:02:45,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7
[2020-07-20 12:02:45,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359766799]
[2020-07-20 12:02:45,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-07-20 12:02:45,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 12:02:45,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-07-20 12:02:45,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-07-20 12:02:45,819 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states.
[2020-07-20 12:02:45,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 12:02:45,912 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions.
[2020-07-20 12:02:45,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2020-07-20 12:02:45,912 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12
[2020-07-20 12:02:45,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 12:02:45,913 INFO L225 Difference]: With dead ends: 15
[2020-07-20 12:02:45,913 INFO L226 Difference]: Without dead ends: 0
[2020-07-20 12:02:45,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72
[2020-07-20 12:02:45,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2020-07-20 12:02:45,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2020-07-20 12:02:45,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2020-07-20 12:02:45,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2020-07-20 12:02:45,918 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12
[2020-07-20 12:02:45,919 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 12:02:45,920 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2020-07-20 12:02:45,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-07-20 12:02:45,920 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2020-07-20 12:02:45,921 INFO L282 IsEmpty]: Finished isEmpty. No accepting run.
[2020-07-20 12:02:46,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 12:02:46,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2020-07-20 12:02:46,214 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed.
[2020-07-20 12:02:46,215 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true
[2020-07-20 12:02:46,215 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed.
[2020-07-20 12:02:46,215 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed.
[2020-07-20 12:02:46,216 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true
[2020-07-20 12:02:46,217 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true
[2020-07-20 12:02:46,217 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed.
[2020-07-20 12:02:46,218 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed.
[2020-07-20 12:02:46,218 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed.
[2020-07-20 12:02:46,219 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 6) no Hoare annotation was computed.
[2020-07-20 12:02:46,219 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed.
[2020-07-20 12:02:46,220 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 46) no Hoare annotation was computed.
[2020-07-20 12:02:46,220 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 58) the Hoare annotation is: true
[2020-07-20 12:02:46,220 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 58) no Hoare annotation was computed.
[2020-07-20 12:02:46,220 INFO L268 CegarLoopResult]: For program point L23(lines 23 56) no Hoare annotation was computed.
[2020-07-20 12:02:46,221 INFO L268 CegarLoopResult]: For program point L17(lines 17 57) no Hoare annotation was computed.
[2020-07-20 12:02:46,221 INFO L268 CegarLoopResult]: For program point L46(line 46) no Hoare annotation was computed.
[2020-07-20 12:02:46,221 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 11 58) no Hoare annotation was computed.
[2020-07-20 12:02:46,229 INFO L268 CegarLoopResult]: For program point L44(lines 44 53) no Hoare annotation was computed.
[2020-07-20 12:02:46,229 INFO L264 CegarLoopResult]: At program point L35(lines 28 56) the Hoare annotation is: (or (< 0 main_~main__y~0) (< main_~main__x~0 0))
[2020-07-20 12:02:46,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 12:02:46 BoogieIcfgContainer
[2020-07-20 12:02:46,268 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-20 12:02:46,271 INFO L168 Benchmark]: Toolchain (without parser) took 1964.07 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 100.9 MB in the beginning and 118.1 MB in the end (delta: -17.1 MB). Peak memory consumption was 46.8 MB. Max. memory is 7.1 GB.
[2020-07-20 12:02:46,272 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB.
[2020-07-20 12:02:46,273 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.20 ms. Allocated memory is still 136.8 MB. Free memory was 100.7 MB in the beginning and 91.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB.
[2020-07-20 12:02:46,275 INFO L168 Benchmark]: Boogie Preprocessor took 120.06 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 91.1 MB in the beginning and 179.6 MB in the end (delta: -88.5 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB.
[2020-07-20 12:02:46,276 INFO L168 Benchmark]: RCFGBuilder took 293.25 ms. Allocated memory is still 200.8 MB. Free memory was 179.6 MB in the beginning and 167.2 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB.
[2020-07-20 12:02:46,277 INFO L168 Benchmark]: TraceAbstraction took 1235.62 ms. Allocated memory is still 200.8 MB. Free memory was 167.2 MB in the beginning and 118.1 MB in the end (delta: 49.1 MB). Peak memory consumption was 49.1 MB. Max. memory is 7.1 GB.
[2020-07-20 12:02:46,281 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.30 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 305.20 ms. Allocated memory is still 136.8 MB. Free memory was 100.7 MB in the beginning and 91.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 120.06 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 91.1 MB in the beginning and 179.6 MB in the end (delta: -88.5 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 293.25 ms. Allocated memory is still 200.8 MB. Free memory was 179.6 MB in the beginning and 167.2 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 1235.62 ms. Allocated memory is still 200.8 MB. Free memory was 167.2 MB in the beginning and 118.1 MB in the end (delta: 49.1 MB). Peak memory consumption was 49.1 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- PositiveResult [Line: 46]: call of __VERIFIER_error() unreachable
For all program executions holds that call of __VERIFIER_error() unreachable at this location
- AllSpecificationsHoldResult: All specifications hold
1 specifications checked. All of them hold
- InvariantResult [Line: 28]: Loop Invariant
Derived loop invariant: 0 < main__y || main__x < 0
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 25 SDtfs, 7 SDslu, 34 SDs, 0 SdLazy, 16 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 7 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 10 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 814 SizeOfPredicates, 6 NumberOfNonLiveVariables, 83 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 0/2 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 correct!
Received shutdown request...