/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/regression/ThreadIdTest-Safe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 14:15:48,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 14:15:48,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 14:15:48,556 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 14:15:48,556 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 14:15:48,557 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 14:15:48,558 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 14:15:48,559 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 14:15:48,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 14:15:48,560 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 14:15:48,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 14:15:48,562 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-11 14:15:48,562 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 14:15:48,562 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 14:15:48,563 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 14:15:48,564 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 14:15:48,564 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 14:15:48,565 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 14:15:48,566 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 14:15:48,567 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 14:15:48,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 14:15:48,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 14:15:48,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 14:15:48,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 14:15:48,571 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-11 14:15:48,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 14:15:48,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 14:15:48,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 14:15:48,584 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 14:15:48,604 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 14:15:48,605 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 14:15:48,607 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 14:15:48,608 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 14:15:48,608 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 14:15:48,608 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 14:15:48,608 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 14:15:48,608 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 14:15:48,608 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 14:15:48,608 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 14:15:48,609 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 14:15:48,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 14:15:48,609 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 14:15:48,609 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 14:15:48,609 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 14:15:48,609 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 14:15:48,609 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 14:15:48,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 14:15:48,610 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 14:15:48,610 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 14:15:48,610 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 14:15:48,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 14:15:48,610 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 14:15:48,610 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 14:15:48,610 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 14:15:48,610 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 14:15:48,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 14:15:48,611 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-11 14:15:48,611 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 14:15:48,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 14:15:48,894 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 14:15:48,896 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 14:15:48,896 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 14:15:48,897 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 14:15:48,898 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ThreadIdTest-Safe.bpl [2021-03-11 14:15:48,898 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ThreadIdTest-Safe.bpl' [2021-03-11 14:15:48,931 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 14:15:48,936 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 14:15:48,937 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 14:15:48,937 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 14:15:48,937 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 14:15:48,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ThreadIdTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:15:48" (1/1) ... [2021-03-11 14:15:48,952 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ThreadIdTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:15:48" (1/1) ... [2021-03-11 14:15:48,957 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 14:15:48,959 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 14:15:48,959 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 14:15:48,959 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 14:15:48,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ThreadIdTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:15:48" (1/1) ... [2021-03-11 14:15:48,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ThreadIdTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:15:48" (1/1) ... [2021-03-11 14:15:48,966 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ThreadIdTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:15:48" (1/1) ... [2021-03-11 14:15:48,966 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ThreadIdTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:15:48" (1/1) ... [2021-03-11 14:15:48,967 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ThreadIdTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:15:48" (1/1) ... [2021-03-11 14:15:48,968 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ThreadIdTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:15:48" (1/1) ... [2021-03-11 14:15:48,969 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ThreadIdTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:15:48" (1/1) ... [2021-03-11 14:15:48,969 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 14:15:48,971 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 14:15:48,971 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 14:15:48,971 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 14:15:48,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ThreadIdTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:15:48" (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 14:15:49,021 INFO L130 BoogieDeclarations]: Found specification of procedure decrement [2021-03-11 14:15:49,022 INFO L138 BoogieDeclarations]: Found implementation of procedure decrement [2021-03-11 14:15:49,022 INFO L130 BoogieDeclarations]: Found specification of procedure increment [2021-03-11 14:15:49,023 INFO L138 BoogieDeclarations]: Found implementation of procedure increment [2021-03-11 14:15:49,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 14:15:49,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 14:15:49,024 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 14:15:49,107 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 14:15:49,107 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 14:15:49,108 INFO L202 PluginConnector]: Adding new model ThreadIdTest-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 02:15:49 BoogieIcfgContainer [2021-03-11 14:15:49,108 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 14:15:49,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 14:15:49,110 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 14:15:49,112 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 14:15:49,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ThreadIdTest-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:15:48" (1/2) ... [2021-03-11 14:15:49,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75c5b2f2 and model type ThreadIdTest-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 02:15:49, skipping insertion in model container [2021-03-11 14:15:49,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ThreadIdTest-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 02:15:49" (2/2) ... [2021-03-11 14:15:49,114 INFO L111 eAbstractionObserver]: Analyzing ICFG ThreadIdTest-Safe.bpl [2021-03-11 14:15:49,121 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-11 14:15:49,121 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 14:15:49,125 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 14:15:49,126 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 14:15:49,148 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:15:49,149 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:15:49,149 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:15:49,149 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:15:49,149 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:15:49,149 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:15:49,150 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:15:49,150 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:15:49,151 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:15:49,154 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:15:49,159 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-11 14:15:49,170 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-11 14:15:49,182 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 14:15:49,183 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-11 14:15:49,183 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 14:15:49,183 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 14:15:49,183 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 14:15:49,183 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 14:15:49,183 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 14:15:49,183 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 14:15:49,206 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 14:15:49,216 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 20 places, 14 transitions, 44 flow [2021-03-11 14:15:49,222 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 20 places, 14 transitions, 44 flow [2021-03-11 14:15:49,223 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 14 transitions, 44 flow [2021-03-11 14:15:49,244 INFO L129 PetriNetUnfolder]: 0/15 cut-off events. [2021-03-11 14:15:49,244 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-11 14:15:49,245 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 15 events. 0/15 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 17 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-11 14:15:49,246 INFO L116 LiptonReduction]: Number of co-enabled transitions 44 [2021-03-11 14:15:49,300 INFO L131 LiptonReduction]: Checked pairs total: 33 [2021-03-11 14:15:49,300 INFO L133 LiptonReduction]: Total number of compositions: 3 [2021-03-11 14:15:49,312 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 17 places, 11 transitions, 38 flow [2021-03-11 14:15:49,326 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 20 states, 16 states have (on average 1.6875) internal successors, (27), 19 states have internal predecessors, (27), 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 14:15:49,328 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 16 states have (on average 1.6875) internal successors, (27), 19 states have internal predecessors, (27), 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 14:15:49,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-03-11 14:15:49,333 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 14:15:49,334 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-11 14:15:49,334 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 14:15:49,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 14:15:49,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1428805206, now seen corresponding path program 1 times [2021-03-11 14:15:49,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 14:15:49,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157638258] [2021-03-11 14:15:49,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 14:15:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 14:15:49,465 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:15:49,466 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 14:15:49,475 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:15:49,475 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 14:15:49,482 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:15:49,483 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 14:15:49,495 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-03-11 14:15:49,496 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 14:15:49,514 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 14:15:49,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157638258] [2021-03-11 14:15:49,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 14:15:49,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 14:15:49,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316207762] [2021-03-11 14:15:49,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 14:15:49,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 14:15:49,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 14:15:49,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-03-11 14:15:49,529 INFO L87 Difference]: Start difference. First operand has 20 states, 16 states have (on average 1.6875) internal successors, (27), 19 states have internal predecessors, (27), 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 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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 14:15:49,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 14:15:49,639 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2021-03-11 14:15:49,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-11 14:15:49,640 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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 6 [2021-03-11 14:15:49,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 14:15:49,644 INFO L225 Difference]: With dead ends: 18 [2021-03-11 14:15:49,645 INFO L226 Difference]: Without dead ends: 12 [2021-03-11 14:15:49,645 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-11 14:15:49,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-03-11 14:15:49,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-03-11 14:15:49,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 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 14:15:49,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2021-03-11 14:15:49,665 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 6 [2021-03-11 14:15:49,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 14:15:49,666 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2021-03-11 14:15:49,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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 14:15:49,666 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2021-03-11 14:15:49,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-03-11 14:15:49,666 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 14:15:49,666 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-11 14:15:49,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 14:15:49,667 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 14:15:49,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 14:15:49,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1428660064, now seen corresponding path program 1 times [2021-03-11 14:15:49,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 14:15:49,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887596943] [2021-03-11 14:15:49,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 14:15:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 14:15:49,695 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:15:49,696 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 14:15:49,696 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:15:49,697 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 14:15:49,699 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:15:49,700 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 14:15:49,700 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 14:15:49,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887596943] [2021-03-11 14:15:49,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 14:15:49,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 14:15:49,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642670796] [2021-03-11 14:15:49,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 14:15:49,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 14:15:49,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 14:15:49,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 14:15:49,704 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 14:15:49,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 14:15:49,706 INFO L93 Difference]: Finished difference Result 8 states and 9 transitions. [2021-03-11 14:15:49,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 14:15:49,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2021-03-11 14:15:49,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 14:15:49,707 INFO L225 Difference]: With dead ends: 8 [2021-03-11 14:15:49,708 INFO L226 Difference]: Without dead ends: 0 [2021-03-11 14:15:49,709 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 14:15:49,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-03-11 14:15:49,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-03-11 14:15:49,710 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 14:15:49,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-03-11 14:15:49,710 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2021-03-11 14:15:49,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 14:15:49,710 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-03-11 14:15:49,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 14:15:49,711 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-03-11 14:15:49,711 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-03-11 14:15:49,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 14:15:49,714 INFO L202 PluginConnector]: Adding new model ThreadIdTest-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 02:15:49 BasicIcfg [2021-03-11 14:15:49,714 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 14:15:49,715 INFO L168 Benchmark]: Toolchain (without parser) took 781.68 ms. Allocated memory is still 352.3 MB. Free memory was 333.0 MB in the beginning and 299.1 MB in the end (delta: 33.9 MB). Peak memory consumption was 34.2 MB. Max. memory is 16.0 GB. [2021-03-11 14:15:49,716 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 352.3 MB. Free memory was 334.0 MB in the beginning and 333.9 MB in the end (delta: 83.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 14:15:49,717 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.13 ms. Allocated memory is still 352.3 MB. Free memory was 332.5 MB in the beginning and 331.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 14:15:49,718 INFO L168 Benchmark]: Boogie Preprocessor took 10.90 ms. Allocated memory is still 352.3 MB. Free memory was 331.0 MB in the beginning and 330.2 MB in the end (delta: 822.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 14:15:49,720 INFO L168 Benchmark]: RCFGBuilder took 137.53 ms. Allocated memory is still 352.3 MB. Free memory was 330.1 MB in the beginning and 321.7 MB in the end (delta: 8.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-03-11 14:15:49,723 INFO L168 Benchmark]: TraceAbstraction took 603.96 ms. Allocated memory is still 352.3 MB. Free memory was 321.2 MB in the beginning and 299.1 MB in the end (delta: 22.1 MB). Peak memory consumption was 21.6 MB. Max. memory is 16.0 GB. [2021-03-11 14:15:49,725 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 0.09 ms. Allocated memory is still 352.3 MB. Free memory was 334.0 MB in the beginning and 333.9 MB in the end (delta: 83.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 21.13 ms. Allocated memory is still 352.3 MB. Free memory was 332.5 MB in the beginning and 331.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.90 ms. Allocated memory is still 352.3 MB. Free memory was 331.0 MB in the beginning and 330.2 MB in the end (delta: 822.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 137.53 ms. Allocated memory is still 352.3 MB. Free memory was 330.1 MB in the beginning and 321.7 MB in the end (delta: 8.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 603.96 ms. Allocated memory is still 352.3 MB. Free memory was 321.2 MB in the beginning and 299.1 MB in the end (delta: 22.1 MB). Peak memory consumption was 21.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 78.2ms, 20 PlacesBefore, 17 PlacesAfterwards, 14 TransitionsBefore, 11 TransitionsAfterwards, 44 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 3 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 3 TotalNumberOfCompositions, 33 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 33, positive: 33, positive conditional: 0, positive unconditional: 33, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 28, positive: 28, positive conditional: 0, positive unconditional: 28, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 28, positive: 28, positive conditional: 0, positive unconditional: 28, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 33, positive: 5, positive conditional: 0, positive unconditional: 5, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 28, unknown conditional: 0, unknown unconditional: 28] , Statistics on independence cache: Total cache size (in pairs): 9, Positive cache size: 9, Positive conditional cache size: 0, Positive unconditional cache size: 9, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - PositiveResult [Line: 22]: 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 3 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 530.5ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 7.4ms, AutomataDifference: 132.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 143.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 14 SDtfs, 27 SDslu, 12 SDs, 0 SdLazy, 17 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 106.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, InterpolantAutomatonStates: 10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 11.1ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 4.0ms SsaConstructionTime, 16.3ms SatisfiabilityAnalysisTime, 100.8ms InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 44 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...