/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/spaghetti.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 14:52:10,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 14:52:10,399 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 14:52:10,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 14:52:10,427 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 14:52:10,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 14:52:10,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 14:52:10,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 14:52:10,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 14:52:10,438 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 14:52:10,439 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 14:52:10,440 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-11 14:52:10,440 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 14:52:10,442 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 14:52:10,442 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 14:52:10,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 14:52:10,445 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 14:52:10,446 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 14:52:10,447 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 14:52:10,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 14:52:10,454 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 14:52:10,455 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 14:52:10,455 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 14:52:10,457 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 14:52:10,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-11 14:52:10,467 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-11 14:52:10,468 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-11 14:52:10,469 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-11 14:52:10,469 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-11 14:52:10,469 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-11 14:52:10,470 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-11 14:52:10,470 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-11 14:52:10,470 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-11 14:52:10,470 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 14:52:10,471 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 14:52:10,471 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 14:52:10,472 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf [2021-03-11 14:52:10,499 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 14:52:10,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 14:52:10,502 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 14:52:10,502 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 14:52:10,502 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 14:52:10,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 14:52:10,502 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 14:52:10,503 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 14:52:10,503 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 14:52:10,503 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 14:52:10,503 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 14:52:10,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 14:52:10,504 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 14:52:10,504 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 14:52:10,504 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 14:52:10,504 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 14:52:10,504 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 14:52:10,504 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 14:52:10,504 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 14:52:10,504 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 14:52:10,505 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 14:52:10,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 14:52:10,505 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 14:52:10,505 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 14:52:10,505 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 14:52:10,505 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 14:52:10,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 14:52:10,505 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-11 14:52:10,505 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 14:52:10,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 14:52:10,741 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 14:52:10,742 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 14:52:10,743 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 14:52:10,744 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 14:52:10,744 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/spaghetti.wvr.bpl [2021-03-11 14:52:10,744 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/spaghetti.wvr.bpl' [2021-03-11 14:52:10,770 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 14:52:10,774 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 14:52:10,774 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 14:52:10,775 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 14:52:10,775 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 14:52:10,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:52:10" (1/1) ... [2021-03-11 14:52:10,790 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:52:10" (1/1) ... [2021-03-11 14:52:10,795 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 14:52:10,796 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 14:52:10,796 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 14:52:10,796 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 14:52:10,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:52:10" (1/1) ... [2021-03-11 14:52:10,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:52:10" (1/1) ... [2021-03-11 14:52:10,801 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:52:10" (1/1) ... [2021-03-11 14:52:10,801 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:52:10" (1/1) ... [2021-03-11 14:52:10,802 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:52:10" (1/1) ... [2021-03-11 14:52:10,804 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:52:10" (1/1) ... [2021-03-11 14:52:10,804 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:52:10" (1/1) ... [2021-03-11 14:52:10,805 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 14:52:10,806 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 14:52:10,806 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 14:52:10,806 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 14:52:10,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:52:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 14:52:10,849 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-11 14:52:10,849 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-11 14:52:10,849 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-11 14:52:10,849 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-11 14:52:10,850 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-11 14:52:10,850 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-11 14:52:10,850 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 14:52:10,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 14:52:10,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 14:52:10,850 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-11 14:52:10,850 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-11 14:52:10,850 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-11 14:52:10,850 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-03-11 14:52:10,850 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-03-11 14:52:10,850 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-03-11 14:52:10,851 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 14:52:10,970 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 14:52:10,970 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-03-11 14:52:10,971 INFO L202 PluginConnector]: Adding new model spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 02:52:10 BoogieIcfgContainer [2021-03-11 14:52:10,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 14:52:10,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 14:52:10,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 14:52:10,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 14:52:10,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:52:10" (1/2) ... [2021-03-11 14:52:10,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d950d1 and model type spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 02:52:10, skipping insertion in model container [2021-03-11 14:52:10,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 02:52:10" (2/2) ... [2021-03-11 14:52:10,976 INFO L111 eAbstractionObserver]: Analyzing ICFG spaghetti.wvr.bpl [2021-03-11 14:52:10,979 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-11 14:52:10,979 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 14:52:10,981 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 14:52:10,982 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 14:52:11,041 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-03-11 14:52:11,053 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-11 14:52:11,079 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 14:52:11,079 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-11 14:52:11,079 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 14:52:11,079 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 14:52:11,079 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 14:52:11,080 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 14:52:11,080 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 14:52:11,080 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 14:52:11,091 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 14:52:11,098 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 43 places, 34 transitions, 100 flow [2021-03-11 14:52:11,099 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 43 places, 34 transitions, 100 flow [2021-03-11 14:52:11,103 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 43 places, 34 transitions, 100 flow [2021-03-11 14:52:11,128 INFO L129 PetriNetUnfolder]: 4/30 cut-off events. [2021-03-11 14:52:11,128 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-11 14:52:11,130 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 30 events. 4/30 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 60 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2021-03-11 14:52:11,131 INFO L116 LiptonReduction]: Number of co-enabled transitions 350 [2021-03-11 14:52:15,445 INFO L131 LiptonReduction]: Checked pairs total: 494 [2021-03-11 14:52:15,445 INFO L133 LiptonReduction]: Total number of compositions: 11 [2021-03-11 14:52:15,452 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 24 transitions, 80 flow [2021-03-11 14:52:15,463 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 87 states, 85 states have (on average 3.6941176470588237) internal successors, (314), 86 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:52:15,464 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 85 states have (on average 3.6941176470588237) internal successors, (314), 86 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:52:15,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-11 14:52:15,469 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 14:52:15,470 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 14:52:15,470 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 14:52:15,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 14:52:15,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1607120222, now seen corresponding path program 1 times [2021-03-11 14:52:15,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 14:52:15,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061888263] [2021-03-11 14:52:15,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 14:52:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 14:52:15,591 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:52:15,591 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 14:52:15,597 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:52:15,609 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 14:52:15,623 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-11 14:52:15,624 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 14:52:15,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 14:52:15,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061888263] [2021-03-11 14:52:15,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 14:52:15,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 14:52:15,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674734748] [2021-03-11 14:52:15,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 14:52:15,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 14:52:15,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 14:52:15,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 14:52:15,653 INFO L87 Difference]: Start difference. First operand has 87 states, 85 states have (on average 3.6941176470588237) internal successors, (314), 86 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:52:15,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 14:52:15,732 INFO L93 Difference]: Finished difference Result 135 states and 452 transitions. [2021-03-11 14:52:15,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 14:52:15,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-11 14:52:15,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 14:52:15,741 INFO L225 Difference]: With dead ends: 135 [2021-03-11 14:52:15,742 INFO L226 Difference]: Without dead ends: 53 [2021-03-11 14:52:15,743 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-11 14:52:15,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-03-11 14:52:15,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2021-03-11 14:52:15,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 3.1914893617021276) internal successors, (150), 47 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:52:15,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 150 transitions. [2021-03-11 14:52:15,776 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 150 transitions. Word has length 13 [2021-03-11 14:52:15,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 14:52:15,776 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 150 transitions. [2021-03-11 14:52:15,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:52:15,777 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 150 transitions. [2021-03-11 14:52:15,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-11 14:52:15,777 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 14:52:15,778 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 14:52:15,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 14:52:15,778 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 14:52:15,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 14:52:15,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1988760054, now seen corresponding path program 2 times [2021-03-11 14:52:15,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 14:52:15,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958989634] [2021-03-11 14:52:15,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 14:52:15,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 14:52:15,817 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:52:15,817 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 14:52:15,819 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:52:15,819 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 14:52:15,828 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-11 14:52:15,828 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 14:52:15,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 14:52:15,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958989634] [2021-03-11 14:52:15,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 14:52:15,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 14:52:15,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021985368] [2021-03-11 14:52:15,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 14:52:15,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 14:52:15,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 14:52:15,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 14:52:15,865 INFO L87 Difference]: Start difference. First operand 48 states and 150 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:52:15,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 14:52:15,913 INFO L93 Difference]: Finished difference Result 57 states and 177 transitions. [2021-03-11 14:52:15,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 14:52:15,913 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-11 14:52:15,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 14:52:15,914 INFO L225 Difference]: With dead ends: 57 [2021-03-11 14:52:15,914 INFO L226 Difference]: Without dead ends: 0 [2021-03-11 14:52:15,914 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-11 14:52:15,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-03-11 14:52:15,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-03-11 14:52:15,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:52:15,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-03-11 14:52:15,915 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2021-03-11 14:52:15,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 14:52:15,915 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-03-11 14:52:15,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:52:15,915 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-03-11 14:52:15,915 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-03-11 14:52:15,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 14:52:15,917 INFO L202 PluginConnector]: Adding new model spaghetti.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 02:52:15 BasicIcfg [2021-03-11 14:52:15,918 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 14:52:15,918 INFO L168 Benchmark]: Toolchain (without parser) took 5146.99 ms. Allocated memory was 255.9 MB in the beginning and 354.4 MB in the end (delta: 98.6 MB). Free memory was 236.2 MB in the beginning and 329.4 MB in the end (delta: -93.1 MB). Peak memory consumption was 4.5 MB. Max. memory is 16.0 GB. [2021-03-11 14:52:15,919 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 255.9 MB. Free memory is still 237.4 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 14:52:15,919 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.48 ms. Allocated memory is still 255.9 MB. Free memory was 235.8 MB in the beginning and 234.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 14:52:15,919 INFO L168 Benchmark]: Boogie Preprocessor took 9.47 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 233.3 MB in the end (delta: 962.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 14:52:15,920 INFO L168 Benchmark]: RCFGBuilder took 166.04 ms. Allocated memory is still 255.9 MB. Free memory was 233.3 MB in the beginning and 238.9 MB in the end (delta: -5.6 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. [2021-03-11 14:52:15,920 INFO L168 Benchmark]: TraceAbstraction took 4945.11 ms. Allocated memory was 255.9 MB in the beginning and 354.4 MB in the end (delta: 98.6 MB). Free memory was 238.5 MB in the beginning and 329.4 MB in the end (delta: -90.9 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.0 GB. [2021-03-11 14:52:15,922 INFO L339 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 0.08 ms. Allocated memory is still 255.9 MB. Free memory is still 237.4 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.48 ms. Allocated memory is still 255.9 MB. Free memory was 235.8 MB in the beginning and 234.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 9.47 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 233.3 MB in the end (delta: 962.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 166.04 ms. Allocated memory is still 255.9 MB. Free memory was 233.3 MB in the beginning and 238.9 MB in the end (delta: -5.6 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 4945.11 ms. Allocated memory was 255.9 MB in the beginning and 354.4 MB in the end (delta: 98.6 MB). Free memory was 238.5 MB in the beginning and 329.4 MB in the end (delta: -90.9 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4346.1ms, 43 PlacesBefore, 33 PlacesAfterwards, 34 TransitionsBefore, 24 TransitionsAfterwards, 350 CoEnabledTransitionPairs, 2 FixpointIterations, 3 TrivialSequentialCompositions, 8 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 11 TotalNumberOfCompositions, 494 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 357, positive: 337, positive conditional: 0, positive unconditional: 337, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 237, positive: 218, positive conditional: 0, positive unconditional: 218, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 237, positive: 196, positive conditional: 0, positive unconditional: 196, negative: 41, negative conditional: 0, negative unconditional: 41, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 41, positive: 22, positive conditional: 0, positive unconditional: 22, negative: 17, negative conditional: 0, negative unconditional: 17, unknown: 2, unknown conditional: 0, unknown unconditional: 2] , SemanticIndependenceRelation.Query Time [ms]: [ total: 4202, positive: 54, positive conditional: 0, positive unconditional: 54, negative: 97, negative conditional: 0, negative unconditional: 97, unknown: 4051, unknown conditional: 0, unknown unconditional: 4051] ], Cache Queries: [ total: 357, positive: 119, positive conditional: 0, positive unconditional: 119, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 237, unknown conditional: 0, unknown unconditional: 237] , Statistics on independence cache: Total cache size (in pairs): 66, Positive cache size: 60, Positive conditional cache size: 0, Positive unconditional cache size: 60, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6 - PositiveResult [Line: 66]: 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, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4837.9ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 7.3ms, AutomataDifference: 153.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 4383.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 71 SDtfs, 22 SDslu, 33 SDs, 0 SdLazy, 63 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 59.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=0, InterpolantAutomatonStates: 8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 25.6ms AutomataMinimizationTime, 2 MinimizatonAttempts, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 5.6ms SsaConstructionTime, 22.5ms SatisfiabilityAnalysisTime, 158.9ms InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 132 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...