/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/ldv-regression/test20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:21:53,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:21:53,245 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:21:53,260 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:21:53,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:21:53,261 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:21:53,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:21:53,264 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:21:53,266 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:21:53,267 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:21:53,268 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:21:53,269 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:21:53,270 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:21:53,271 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:21:53,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:21:53,273 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:21:53,274 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:21:53,275 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:21:53,278 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:21:53,280 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:21:53,289 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:21:53,293 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:21:53,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:21:53,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:21:53,301 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 11:21:53,318 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:21:53,322 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:21:53,323 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:21:53,325 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 [2020-07-21 11:21:53,353 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:21:53,354 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:21:53,357 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:21:53,357 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:21:53,358 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:21:53,358 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:21:53,358 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:21:53,358 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:21:53,358 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:21:53,359 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:21:53,360 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:21:53,360 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:21:53,361 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:21:53,361 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:21:53,361 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:21:53,362 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:21:53,362 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:21:53,362 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:21:53,362 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:21:53,363 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:21:53,363 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:21:53,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:21:53,363 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:21:53,364 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:21:53,364 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:21:53,364 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:21:53,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:53,364 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:21:53,365 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:21:53,365 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 [2020-07-21 11:21:53,778 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:21:53,795 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:21:53,800 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:21:53,802 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:21:53,803 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:21:53,803 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test20.c [2020-07-21 11:21:53,906 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94ca76226/baef651f4c2545578de389858f81bc3b/FLAGaca0e0262 [2020-07-21 11:21:54,494 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:21:54,495 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test20.c [2020-07-21 11:21:54,502 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94ca76226/baef651f4c2545578de389858f81bc3b/FLAGaca0e0262 [2020-07-21 11:21:54,841 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94ca76226/baef651f4c2545578de389858f81bc3b [2020-07-21 11:21:54,852 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:21:54,855 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:21:54,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:21:54,857 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:21:54,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:21:54,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:21:54" (1/1) ... [2020-07-21 11:21:54,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58ebf14e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:54, skipping insertion in model container [2020-07-21 11:21:54,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:21:54" (1/1) ... [2020-07-21 11:21:54,875 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:21:54,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:21:55,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:21:55,073 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:21:55,089 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:21:55,119 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:21:55,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:55 WrapperNode [2020-07-21 11:21:55,120 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:21:55,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:21:55,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:21:55,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:21:55,136 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:55" (1/1) ... [2020-07-21 11:21:55,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:55" (1/1) ... [2020-07-21 11:21:55,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:55" (1/1) ... [2020-07-21 11:21:55,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:55" (1/1) ... [2020-07-21 11:21:55,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:55" (1/1) ... [2020-07-21 11:21:55,255 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:55" (1/1) ... [2020-07-21 11:21:55,256 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:55" (1/1) ... [2020-07-21 11:21:55,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:21:55,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:21:55,266 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:21:55,267 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:21:55,268 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:55" (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 [2020-07-21 11:21:55,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:21:55,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:21:55,333 INFO L138 BoogieDeclarations]: Found implementation of procedure equal [2020-07-21 11:21:55,334 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:21:55,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:21:55,334 INFO L130 BoogieDeclarations]: Found specification of procedure equal [2020-07-21 11:21:55,334 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:21:55,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:21:55,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 11:21:55,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-21 11:21:55,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:21:55,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 11:21:55,335 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 11:21:55,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 11:21:55,617 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:21:55,618 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 11:21:55,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:21:55 BoogieIcfgContainer [2020-07-21 11:21:55,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:21:55,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:21:55,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:21:55,648 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:21:55,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:21:54" (1/3) ... [2020-07-21 11:21:55,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@136a248f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:21:55, skipping insertion in model container [2020-07-21 11:21:55,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:55" (2/3) ... [2020-07-21 11:21:55,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@136a248f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:21:55, skipping insertion in model container [2020-07-21 11:21:55,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:21:55" (3/3) ... [2020-07-21 11:21:55,661 INFO L109 eAbstractionObserver]: Analyzing ICFG test20.c [2020-07-21 11:21:55,676 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:21:55,685 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:21:55,709 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:21:55,734 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:21:55,735 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:21:55,735 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:21:55,735 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:21:55,736 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:21:55,736 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:21:55,736 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:21:55,736 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:21:55,756 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-07-21 11:21:55,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-07-21 11:21:55,762 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:21:55,763 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:21:55,763 INFO L427 AbstractCegarLoop]: === Iteration 1 === [equalErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:21:55,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:21:55,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1534444928, now seen corresponding path program 1 times [2020-07-21 11:21:55,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:21:55,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688583153] [2020-07-21 11:21:55,778 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 [2020-07-21 11:21:55,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:21:55,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 11:21:55,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:21:55,966 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2020-07-21 11:21:55,971 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-21 11:21:55,998 INFO L624 ElimStorePlain]: treesize reduction 14, result has 22.2 percent of original size [2020-07-21 11:21:55,999 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:21:56,000 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:4 [2020-07-21 11:21:56,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:21:56,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:21:56,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688583153] [2020-07-21 11:21:56,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:21:56,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 11:21:56,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497433978] [2020-07-21 11:21:56,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 11:21:56,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:21:56,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 11:21:56,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:21:56,071 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-07-21 11:21:56,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:21:56,155 INFO L93 Difference]: Finished difference Result 24 states and 23 transitions. [2020-07-21 11:21:56,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 11:21:56,158 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-07-21 11:21:56,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:21:56,167 INFO L225 Difference]: With dead ends: 24 [2020-07-21 11:21:56,167 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 11:21:56,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-21 11:21:56,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 11:21:56,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 11:21:56,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 11:21:56,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 11:21:56,206 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2020-07-21 11:21:56,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:21:56,207 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 11:21:56,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 11:21:56,207 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 11:21:56,208 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 11:21:56,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:56,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 11:21:56,523 INFO L268 CegarLoopResult]: For program point equalEXIT(lines 4 12) no Hoare annotation was computed. [2020-07-21 11:21:56,523 INFO L271 CegarLoopResult]: At program point equalENTRY(lines 4 12) the Hoare annotation is: true [2020-07-21 11:21:56,523 INFO L268 CegarLoopResult]: For program point equalFINAL(lines 4 12) no Hoare annotation was computed. [2020-07-21 11:21:56,524 INFO L264 CegarLoopResult]: At program point L6(lines 4 12) the Hoare annotation is: (or (= |~#a~0.base| |~#b~0.base|) (= |equal_#in~a.base| |equal_#in~b.base|)) [2020-07-21 11:21:56,524 INFO L268 CegarLoopResult]: For program point L5(lines 5 7) no Hoare annotation was computed. [2020-07-21 11:21:56,524 INFO L268 CegarLoopResult]: For program point equalErr0ASSERT_VIOLATIONERROR_FUNCTION(line 10) no Hoare annotation was computed. [2020-07-21 11:21:56,525 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-21 11:21:56,525 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-21 11:21:56,525 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 11:21:56,525 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 11:21:56,525 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (not (= |~#b~0.base| |~#a~0.base|)) [2020-07-21 11:21:56,526 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 11:21:56,526 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 11:21:56,526 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-07-21 11:21:56,526 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 16 19) the Hoare annotation is: true [2020-07-21 11:21:56,527 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 16 19) no Hoare annotation was computed. [2020-07-21 11:21:56,527 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 16 19) no Hoare annotation was computed. [2020-07-21 11:21:56,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:21:56 BoogieIcfgContainer [2020-07-21 11:21:56,550 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:21:56,552 INFO L168 Benchmark]: Toolchain (without parser) took 1698.18 ms. Allocated memory was 136.8 MB in the beginning and 199.8 MB in the end (delta: 62.9 MB). Free memory was 101.8 MB in the beginning and 126.3 MB in the end (delta: -24.5 MB). Peak memory consumption was 38.4 MB. Max. memory is 7.1 GB. [2020-07-21 11:21:56,554 INFO L168 Benchmark]: CDTParser took 0.19 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: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 11:21:56,555 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.01 ms. Allocated memory is still 136.8 MB. Free memory was 101.4 MB in the beginning and 91.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-21 11:21:56,556 INFO L168 Benchmark]: Boogie Preprocessor took 138.02 ms. Allocated memory was 136.8 MB in the beginning and 199.8 MB in the end (delta: 62.9 MB). Free memory was 91.9 MB in the beginning and 178.3 MB in the end (delta: -86.4 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-07-21 11:21:56,557 INFO L168 Benchmark]: RCFGBuilder took 362.26 ms. Allocated memory is still 199.8 MB. Free memory was 178.3 MB in the beginning and 164.8 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-07-21 11:21:56,558 INFO L168 Benchmark]: TraceAbstraction took 918.34 ms. Allocated memory is still 199.8 MB. Free memory was 164.1 MB in the beginning and 126.3 MB in the end (delta: 37.8 MB). Peak memory consumption was 37.8 MB. Max. memory is 7.1 GB. [2020-07-21 11:21:56,562 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 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: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 263.01 ms. Allocated memory is still 136.8 MB. Free memory was 101.4 MB in the beginning and 91.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 138.02 ms. Allocated memory was 136.8 MB in the beginning and 199.8 MB in the end (delta: 62.9 MB). Free memory was 91.9 MB in the beginning and 178.3 MB in the end (delta: -86.4 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 362.26 ms. Allocated memory is still 199.8 MB. Free memory was 178.3 MB in the beginning and 164.8 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 918.34 ms. Allocated memory is still 199.8 MB. Free memory was 164.1 MB in the beginning and 126.3 MB in the end (delta: 37.8 MB). Peak memory consumption was 37.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 10]: 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: 4]: Loop Invariant Derived loop invariant: a == b || a == b - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.6s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 11 SDtfs, 13 SDslu, 20 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred 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: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 6 PreInvPairs, 6 NumberOfFragments, 15 HoareAnnotationTreeSize, 6 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 22 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 9 NumberOfCodeBlocks, 9 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 208 SizeOfPredicates, 4 NumberOfNonLiveVariables, 82 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...