/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/volatile_alias.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:22:40,639 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:22:40,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:22:40,660 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:22:40,660 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:22:40,662 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:22:40,664 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:22:40,674 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:22:40,678 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:22:40,679 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:22:40,683 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:22:40,684 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:22:40,684 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:22:40,685 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:22:40,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:22:40,687 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:22:40,688 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:22:40,689 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:22:40,690 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:22:40,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:22:40,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:22:40,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:22:40,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:22:40,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:22:40,698 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 11:22:40,705 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:22:40,706 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:22:40,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:22:40,708 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 11:22:40,722 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:22:40,722 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:22:40,723 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:22:40,724 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:22:40,724 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:22:40,724 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:22:40,724 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:22:40,724 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:22:40,725 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:22:40,725 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:22:40,725 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:22:40,725 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:22:40,725 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:22:40,726 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:22:40,726 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:22:40,726 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:22:40,726 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:22:40,726 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:22:40,727 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:22:40,727 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:22:40,727 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:22:40,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:22:40,728 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:22:40,728 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:22:40,728 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:22:40,728 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:22:40,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:22:40,728 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:22:40,729 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:22:40,729 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 11:22:40,994 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:22:41,006 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:22:41,010 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:22:41,011 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:22:41,012 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:22:41,013 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/volatile_alias.i [2020-07-21 11:22:41,096 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1be06f1b9/155902e073a9484a9a5bfc69afa74dac/FLAG9ab147c99 [2020-07-21 11:22:41,555 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:22:41,556 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/volatile_alias.i [2020-07-21 11:22:41,562 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1be06f1b9/155902e073a9484a9a5bfc69afa74dac/FLAG9ab147c99 [2020-07-21 11:22:41,921 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1be06f1b9/155902e073a9484a9a5bfc69afa74dac [2020-07-21 11:22:41,929 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:22:41,931 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:22:41,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:22:41,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:22:41,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:22:41,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:22:41" (1/1) ... [2020-07-21 11:22:41,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@144d20f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:22:41, skipping insertion in model container [2020-07-21 11:22:41,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:22:41" (1/1) ... [2020-07-21 11:22:41,948 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:22:41,970 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:22:42,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:22:42,148 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:22:42,163 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:22:42,179 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:22:42,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:22:42 WrapperNode [2020-07-21 11:22:42,180 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:22:42,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:22:42,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:22:42,181 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:22:42,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:22:42" (1/1) ... [2020-07-21 11:22:42,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:22:42" (1/1) ... [2020-07-21 11:22:42,278 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:22:42" (1/1) ... [2020-07-21 11:22:42,281 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:22:42" (1/1) ... [2020-07-21 11:22:42,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:22:42" (1/1) ... [2020-07-21 11:22:42,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:22:42" (1/1) ... [2020-07-21 11:22:42,290 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:22:42" (1/1) ... [2020-07-21 11:22:42,292 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:22:42,292 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:22:42,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:22:42,293 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:22:42,294 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:22:42" (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 11:22:42,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:22:42,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:22:42,353 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:22:42,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:22:42,353 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:22:42,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 11:22:42,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-21 11:22:42,354 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 11:22:42,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 11:22:42,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 11:22:42,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:22:42,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:22:42,528 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:22:42,529 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 11:22:42,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:22:42 BoogieIcfgContainer [2020-07-21 11:22:42,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:22:42,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:22:42,534 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:22:42,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:22:42,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:22:41" (1/3) ... [2020-07-21 11:22:42,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aa66368 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:22:42, skipping insertion in model container [2020-07-21 11:22:42,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:22:42" (2/3) ... [2020-07-21 11:22:42,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aa66368 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:22:42, skipping insertion in model container [2020-07-21 11:22:42,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:22:42" (3/3) ... [2020-07-21 11:22:42,542 INFO L109 eAbstractionObserver]: Analyzing ICFG volatile_alias.i [2020-07-21 11:22:42,555 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:22:42,564 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:22:42,579 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:22:42,605 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:22:42,605 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:22:42,605 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:22:42,605 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:22:42,606 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:22:42,606 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:22:42,606 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:22:42,606 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:22:42,625 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-07-21 11:22:42,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-07-21 11:22:42,631 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:22:42,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:22:42,633 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:22:42,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:22:42,640 INFO L82 PathProgramCache]: Analyzing trace with hash 2096341077, now seen corresponding path program 1 times [2020-07-21 11:22:42,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:22:42,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582552818] [2020-07-21 11:22:42,650 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 11:22:42,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:22:42,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 11:22:42,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:22:42,919 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 9 [2020-07-21 11:22:42,920 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:22:42,934 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:22:42,934 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:22:42,935 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:3 [2020-07-21 11:22:42,960 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 11:22:42,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:22:42,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582552818] [2020-07-21 11:22:42,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:22:42,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:22:42,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833315357] [2020-07-21 11:22:42,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:22:42,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:22:42,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:22:42,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:22:42,989 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 3 states. [2020-07-21 11:22:43,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:22:43,020 INFO L93 Difference]: Finished difference Result 19 states and 18 transitions. [2020-07-21 11:22:43,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:22:43,024 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-07-21 11:22:43,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:22:43,031 INFO L225 Difference]: With dead ends: 19 [2020-07-21 11:22:43,031 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 11:22:43,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:22:43,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 11:22:43,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 11:22:43,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 11:22:43,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 11:22:43,067 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2020-07-21 11:22:43,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:22:43,068 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 11:22:43,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:22:43,068 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 11:22:43,069 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 11:22:43,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:22:43,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 11:22:43,330 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-21 11:22:43,331 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-21 11:22:43,331 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 11:22:43,331 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 11:22:43,331 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 11:22:43,331 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 11:22:43,332 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 11:22:43,332 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-07-21 11:22:43,332 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 6 16) the Hoare annotation is: true [2020-07-21 11:22:43,332 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-07-21 11:22:43,333 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 6 16) no Hoare annotation was computed. [2020-07-21 11:22:43,333 INFO L268 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2020-07-21 11:22:43,333 INFO L268 CegarLoopResult]: For program point L12-2(lines 12 14) no Hoare annotation was computed. [2020-07-21 11:22:43,333 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 6 16) no Hoare annotation was computed. [2020-07-21 11:22:43,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:22:43 BoogieIcfgContainer [2020-07-21 11:22:43,340 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:22:43,342 INFO L168 Benchmark]: Toolchain (without parser) took 1411.71 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 104.0 MB in the beginning and 142.1 MB in the end (delta: -38.1 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. [2020-07-21 11:22:43,343 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 11:22:43,344 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.52 ms. Allocated memory is still 139.5 MB. Free memory was 103.6 MB in the beginning and 94.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-21 11:22:43,346 INFO L168 Benchmark]: Boogie Preprocessor took 111.00 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 94.2 MB in the beginning and 182.7 MB in the end (delta: -88.5 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-07-21 11:22:43,348 INFO L168 Benchmark]: RCFGBuilder took 240.46 ms. Allocated memory is still 203.9 MB. Free memory was 182.7 MB in the beginning and 171.0 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. [2020-07-21 11:22:43,349 INFO L168 Benchmark]: TraceAbstraction took 806.32 ms. Allocated memory is still 203.9 MB. Free memory was 170.4 MB in the beginning and 142.1 MB in the end (delta: 28.2 MB). Peak memory consumption was 28.2 MB. Max. memory is 7.1 GB. [2020-07-21 11:22:43,354 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 248.52 ms. Allocated memory is still 139.5 MB. Free memory was 103.6 MB in the beginning and 94.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.00 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 94.2 MB in the beginning and 182.7 MB in the end (delta: -88.5 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 240.46 ms. Allocated memory is still 203.9 MB. Free memory was 182.7 MB in the beginning and 171.0 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 806.32 ms. Allocated memory is still 203.9 MB. Free memory was 170.4 MB in the beginning and 142.1 MB in the end (delta: 28.2 MB). Peak memory consumption was 28.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.6s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 10 SDtfs, 0 SDslu, 9 SDs, 0 SdLazy, 2 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred 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, 4 LocationsWithAnnotation, 4 PreInvPairs, 4 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 8 NumberOfCodeBlocks, 8 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 63 SizeOfPredicates, 5 NumberOfNonLiveVariables, 47 ConjunctsInSsa, 10 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...