/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/concurrent/bpl/VMCAI2021/generated/example2_N=04.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b665a9c [2020-09-29 10:29:54,139 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-29 10:29:54,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-29 10:29:54,171 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-29 10:29:54,171 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-29 10:29:54,181 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-29 10:29:54,184 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-29 10:29:54,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-29 10:29:54,191 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-29 10:29:54,194 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-29 10:29:54,195 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-29 10:29:54,198 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-29 10:29:54,199 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-29 10:29:54,201 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-29 10:29:54,204 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-29 10:29:54,206 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-29 10:29:54,207 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-29 10:29:54,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-29 10:29:54,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-29 10:29:54,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-29 10:29:54,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-29 10:29:54,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-29 10:29:54,223 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-29 10:29:54,224 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-29 10:29:54,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-29 10:29:54,246 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-29 10:29:54,246 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-29 10:29:54,247 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-29 10:29:54,254 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-29 10:29:54,255 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-29 10:29:54,255 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-29 10:29:54,256 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-29 10:29:54,256 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-29 10:29:54,256 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-29 10:29:54,257 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-29 10:29:54,259 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-29 10:29:54,260 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 [2020-09-29 10:29:54,311 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-29 10:29:54,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-29 10:29:54,314 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-29 10:29:54,314 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-29 10:29:54,314 INFO L138 SettingsManager]: * Use SBE=true [2020-09-29 10:29:54,315 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-29 10:29:54,315 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-29 10:29:54,315 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-29 10:29:54,316 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-29 10:29:54,316 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-29 10:29:54,317 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-29 10:29:54,317 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-29 10:29:54,317 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-29 10:29:54,318 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-29 10:29:54,318 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-29 10:29:54,318 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-29 10:29:54,318 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-29 10:29:54,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-29 10:29:54,319 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-29 10:29:54,319 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-29 10:29:54,319 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-29 10:29:54,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-29 10:29:54,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-29 10:29:54,320 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-29 10:29:54,320 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-29 10:29:54,320 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-29 10:29:54,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-29 10:29:54,321 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-29 10:29:54,321 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-29 10:29:54,321 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-29 10:29:55,521 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-29 10:29:55,548 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-29 10:29:55,552 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-29 10:29:55,554 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2020-09-29 10:29:55,554 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2020-09-29 10:29:55,556 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/VMCAI2021/generated/example2_N=04.bpl [2020-09-29 10:29:55,556 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/VMCAI2021/generated/example2_N=04.bpl' [2020-09-29 10:29:55,601 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-29 10:29:55,606 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-29 10:29:55,607 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-29 10:29:55,607 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-29 10:29:55,608 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-29 10:29:55,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example2_N=04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 10:29:55" (1/1) ... [2020-09-29 10:29:55,641 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example2_N=04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 10:29:55" (1/1) ... [2020-09-29 10:29:55,653 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-29 10:29:55,654 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-29 10:29:55,654 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-29 10:29:55,655 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-29 10:29:55,669 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example2_N=04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 10:29:55" (1/1) ... [2020-09-29 10:29:55,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example2_N=04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 10:29:55" (1/1) ... [2020-09-29 10:29:55,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example2_N=04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 10:29:55" (1/1) ... [2020-09-29 10:29:55,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example2_N=04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 10:29:55" (1/1) ... [2020-09-29 10:29:55,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example2_N=04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 10:29:55" (1/1) ... [2020-09-29 10:29:55,679 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example2_N=04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 10:29:55" (1/1) ... [2020-09-29 10:29:55,680 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example2_N=04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 10:29:55" (1/1) ... [2020-09-29 10:29:55,682 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-29 10:29:55,683 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-29 10:29:55,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-29 10:29:55,683 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-29 10:29:55,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example2_N=04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 10:29:55" (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 [2020-09-29 10:29:55,789 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2020-09-29 10:29:55,789 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2020-09-29 10:29:55,789 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2020-09-29 10:29:55,790 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2020-09-29 10:29:55,790 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2020-09-29 10:29:55,790 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2020-09-29 10:29:55,790 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2020-09-29 10:29:55,790 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2020-09-29 10:29:55,791 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2020-09-29 10:29:55,791 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2020-09-29 10:29:55,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-29 10:29:55,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-29 10:29:55,792 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2020-09-29 10:29:55,792 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2020-09-29 10:29:55,792 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2020-09-29 10:29:55,793 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-29 10:29:56,019 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-29 10:29:56,019 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-29 10:29:56,024 INFO L202 PluginConnector]: Adding new model example2_N=04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.09 10:29:56 BoogieIcfgContainer [2020-09-29 10:29:56,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-29 10:29:56,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-29 10:29:56,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-29 10:29:56,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-29 10:29:56,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example2_N=04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 10:29:55" (1/2) ... [2020-09-29 10:29:56,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cecff3c and model type example2_N=04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.09 10:29:56, skipping insertion in model container [2020-09-29 10:29:56,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example2_N=04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.09 10:29:56" (2/2) ... [2020-09-29 10:29:56,034 INFO L109 eAbstractionObserver]: Analyzing ICFG example2_N=04.bpl [2020-09-29 10:29:56,044 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-29 10:29:56,044 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-29 10:29:56,056 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-29 10:29:56,057 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-29 10:29:56,183 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-09-29 10:29:56,225 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-29 10:29:56,225 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-29 10:29:56,226 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-29 10:29:56,226 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-29 10:29:56,226 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-29 10:29:56,227 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-29 10:29:56,227 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-29 10:29:56,227 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-29 10:29:56,248 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 33 places, 24 transitions, 80 flow [2020-09-29 10:29:56,251 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 33 places, 24 transitions, 80 flow [2020-09-29 10:29:56,287 INFO L129 PetriNetUnfolder]: 4/20 cut-off events. [2020-09-29 10:29:56,288 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-09-29 10:29:56,294 INFO L80 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 20 events. 4/20 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 13 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2020-09-29 10:29:56,296 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 33 places, 24 transitions, 80 flow [2020-09-29 10:29:56,307 INFO L129 PetriNetUnfolder]: 4/20 cut-off events. [2020-09-29 10:29:56,307 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-09-29 10:29:56,308 INFO L80 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 20 events. 4/20 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 13 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2020-09-29 10:29:56,310 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 96 [2020-09-29 10:29:56,311 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-09-29 10:29:56,369 INFO L206 etLargeBlockEncoding]: Checked pairs total: 0 [2020-09-29 10:29:56,370 INFO L214 etLargeBlockEncoding]: Total number of compositions: 1 [2020-09-29 10:29:56,375 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 23 transitions, 78 flow [2020-09-29 10:29:56,391 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 49 states. [2020-09-29 10:29:56,394 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2020-09-29 10:29:56,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-29 10:29:56,404 INFO L414 BasicCegarLoop]: Found error trace [2020-09-29 10:29:56,405 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-29 10:29:56,405 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-09-29 10:29:56,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-29 10:29:56,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1134688170, now seen corresponding path program 1 times [2020-09-29 10:29:56,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-29 10:29:56,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712097254] [2020-09-29 10:29:56,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-29 10:29:56,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-29 10:29:56,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-29 10:29:56,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712097254] [2020-09-29 10:29:56,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-29 10:29:56,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-09-29 10:29:56,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802268638] [2020-09-29 10:29:56,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-29 10:29:56,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-29 10:29:56,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-29 10:29:56,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-29 10:29:56,651 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 3 states. [2020-09-29 10:29:56,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-29 10:29:56,703 INFO L93 Difference]: Finished difference Result 48 states and 164 transitions. [2020-09-29 10:29:56,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-29 10:29:56,705 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-09-29 10:29:56,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-29 10:29:56,715 INFO L225 Difference]: With dead ends: 48 [2020-09-29 10:29:56,716 INFO L226 Difference]: Without dead ends: 0 [2020-09-29 10:29:56,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-29 10:29:56,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-29 10:29:56,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-29 10:29:56,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-29 10:29:56,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-29 10:29:56,749 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2020-09-29 10:29:56,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-29 10:29:56,749 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-29 10:29:56,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-29 10:29:56,750 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-29 10:29:56,750 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-29 10:29:56,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-29 10:29:56,755 INFO L202 PluginConnector]: Adding new model example2_N=04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.09 10:29:56 BasicIcfg [2020-09-29 10:29:56,755 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-29 10:29:56,759 INFO L168 Benchmark]: Toolchain (without parser) took 1153.91 ms. Allocated memory was 114.3 MB in the beginning and 129.5 MB in the end (delta: 15.2 MB). Free memory was 89.6 MB in the beginning and 84.6 MB in the end (delta: 4.9 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2020-09-29 10:29:56,760 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 114.3 MB. Free memory was 90.8 MB in the beginning and 90.7 MB in the end (delta: 104.9 kB). Peak memory consumption was 104.9 kB. Max. memory is 7.1 GB. [2020-09-29 10:29:56,761 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.74 ms. Allocated memory is still 114.3 MB. Free memory was 89.1 MB in the beginning and 87.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. [2020-09-29 10:29:56,762 INFO L168 Benchmark]: Boogie Preprocessor took 27.94 ms. Allocated memory is still 114.3 MB. Free memory was 87.3 MB in the beginning and 86.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 7.1 GB. [2020-09-29 10:29:56,763 INFO L168 Benchmark]: RCFGBuilder took 341.91 ms. Allocated memory is still 114.3 MB. Free memory was 86.2 MB in the beginning and 75.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-09-29 10:29:56,765 INFO L168 Benchmark]: TraceAbstraction took 729.49 ms. Allocated memory was 114.3 MB in the beginning and 129.5 MB in the end (delta: 15.2 MB). Free memory was 75.1 MB in the beginning and 84.6 MB in the end (delta: -9.6 MB). Peak memory consumption was 5.7 MB. Max. memory is 7.1 GB. [2020-09-29 10:29:56,770 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 114.3 MB. Free memory was 90.8 MB in the beginning and 90.7 MB in the end (delta: 104.9 kB). Peak memory consumption was 104.9 kB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 46.74 ms. Allocated memory is still 114.3 MB. Free memory was 89.1 MB in the beginning and 87.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.94 ms. Allocated memory is still 114.3 MB. Free memory was 87.3 MB in the beginning and 86.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 341.91 ms. Allocated memory is still 114.3 MB. Free memory was 86.2 MB in the beginning and 75.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 729.49 ms. Allocated memory was 114.3 MB in the beginning and 129.5 MB in the end (delta: 15.2 MB). Free memory was 75.1 MB in the beginning and 84.6 MB in the end (delta: -9.6 MB). Peak memory consumption was 5.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 0.1s, 33 ProgramPointsBefore, 32 ProgramPointsAfterwards, 24 TransitionsBefore, 23 TransitionsAfterwards, 96 CoEnabledTransitionPairs, 2 FixpointIterations, 1 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 VarBasedMoverChecksPositive, 0 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 0 CheckedPairsTotal, 1 TotalNumberOfCompositions - PositiveResult [Line: 18]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.5s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 13 SDtfs, 1 SDslu, 0 SDs, 0 SdLazy, 5 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 507 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 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...