/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-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/example_epsilon_write.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-0e22065b97d0a1f8b3904e080cebe0f05e88d2b7-0e22065 [2021-06-10 14:37:36,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-10 14:37:36,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-10 14:37:36,198 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-10 14:37:36,199 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-10 14:37:36,201 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-10 14:37:36,204 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-10 14:37:36,212 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-10 14:37:36,214 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-10 14:37:36,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-10 14:37:36,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-10 14:37:36,220 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-06-10 14:37:36,261 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-PN-NoLbe.epf [2021-06-10 14:37:36,295 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-10 14:37:36,295 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-10 14:37:36,298 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-10 14:37:36,298 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-10 14:37:36,298 INFO L138 SettingsManager]: * Use SBE=true [2021-06-10 14:37:36,298 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-10 14:37:36,298 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-10 14:37:36,298 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-10 14:37:36,299 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-10 14:37:36,299 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-10 14:37:36,300 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-10 14:37:36,300 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-10 14:37:36,300 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-10 14:37:36,300 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-10 14:37:36,300 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-10 14:37:36,300 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-10 14:37:36,300 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-10 14:37:36,301 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-10 14:37:36,301 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-10 14:37:36,301 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-10 14:37:36,301 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-10 14:37:36,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-10 14:37:36,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-10 14:37:36,301 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-10 14:37:36,302 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-10 14:37:36,302 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-10 14:37:36,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-10 14:37:36,302 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-10 14:37:36,302 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-10 14:37:36,302 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-10 14:37:36,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-10 14:37:36,605 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-10 14:37:36,607 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-10 14:37:36,608 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-10 14:37:36,609 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-10 14:37:36,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/example_epsilon_write.bpl [2021-06-10 14:37:36,610 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/example_epsilon_write.bpl' [2021-06-10 14:37:36,646 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-10 14:37:36,647 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-10 14:37:36,648 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-10 14:37:36,648 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-10 14:37:36,649 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-10 14:37:36,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:36" (1/1) ... [2021-06-10 14:37:36,663 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:36" (1/1) ... [2021-06-10 14:37:36,669 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-10 14:37:36,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-10 14:37:36,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-10 14:37:36,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-10 14:37:36,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:36" (1/1) ... [2021-06-10 14:37:36,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:36" (1/1) ... [2021-06-10 14:37:36,679 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:36" (1/1) ... [2021-06-10 14:37:36,680 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:36" (1/1) ... [2021-06-10 14:37:36,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:36" (1/1) ... [2021-06-10 14:37:36,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:36" (1/1) ... [2021-06-10 14:37:36,683 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:36" (1/1) ... [2021-06-10 14:37:36,684 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-10 14:37:36,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-10 14:37:36,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-10 14:37:36,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-10 14:37:36,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:36" (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 [2021-06-10 14:37:36,740 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-10 14:37:36,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-10 14:37:36,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-10 14:37:36,743 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_x given in one single declaration [2021-06-10 14:37:36,743 INFO L130 BoogieDeclarations]: Found specification of procedure set_x [2021-06-10 14:37:36,743 INFO L138 BoogieDeclarations]: Found implementation of procedure set_x [2021-06-10 14:37:36,744 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-10 14:37:36,852 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-10 14:37:36,852 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-10 14:37:36,854 INFO L202 PluginConnector]: Adding new model example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 02:37:36 BoogieIcfgContainer [2021-06-10 14:37:36,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-10 14:37:36,857 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-10 14:37:36,857 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-10 14:37:36,859 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-10 14:37:36,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:37:36" (1/2) ... [2021-06-10 14:37:36,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43b514c5 and model type example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.06 02:37:36, skipping insertion in model container [2021-06-10 14:37:36,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 02:37:36" (2/2) ... [2021-06-10 14:37:36,862 INFO L111 eAbstractionObserver]: Analyzing ICFG example_epsilon_write.bpl [2021-06-10 14:37:36,871 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-10 14:37:36,874 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-06-10 14:37:36,875 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-10 14:37:36,911 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-06-10 14:37:36,929 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-10 14:37:36,959 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:37:36,959 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:37:36,959 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:37:36,959 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:37:36,959 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:37:36,959 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:37:36,959 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:37:36,960 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:37:36,970 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 13 places, 9 transitions, 26 flow [2021-06-10 14:37:36,989 INFO L129 PetriNetUnfolder]: 0/8 cut-off events. [2021-06-10 14:37:36,989 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-06-10 14:37:36,991 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13 conditions, 8 events. 0/8 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 0/7 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-10 14:37:36,991 INFO L82 GeneralOperation]: Start removeDead. Operand has 13 places, 9 transitions, 26 flow [2021-06-10 14:37:36,994 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 10 places, 6 transitions, 18 flow [2021-06-10 14:37:36,996 INFO L129 PetriNetUnfolder]: 0/5 cut-off events. [2021-06-10 14:37:36,997 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-06-10 14:37:36,997 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:37:36,997 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-06-10 14:37:36,998 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:37:37,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:37:37,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1442109907, now seen corresponding path program 1 times [2021-06-10 14:37:37,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:37:37,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722353546] [2021-06-10 14:37:37,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:37:37,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:37:37,126 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:37:37,127 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:37:37,128 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:37:37,130 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:37:37,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:37:37,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722353546] [2021-06-10 14:37:37,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:37:37,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-10 14:37:37,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156071567] [2021-06-10 14:37:37,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:37:37,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:37:37,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:37:37,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:37:37,165 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 9 [2021-06-10 14:37:37,167 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 10 places, 6 transitions, 18 flow. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2021-06-10 14:37:37,167 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:37:37,167 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 9 [2021-06-10 14:37:37,168 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:37:37,183 INFO L129 PetriNetUnfolder]: 0/7 cut-off events. [2021-06-10 14:37:37,183 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-06-10 14:37:37,183 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16 conditions, 7 events. 0/7 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 4 event pairs, 0 based on Foata normal form. 2/9 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-10 14:37:37,184 INFO L132 encePairwiseOnDemand]: 6/9 looper letters, 0 selfloop transitions, 0 changer transitions 5/5 dead transitions. [2021-06-10 14:37:37,184 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 11 places, 5 transitions, 20 flow [2021-06-10 14:37:37,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:37:37,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:37:37,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 19 transitions. [2021-06-10 14:37:37,193 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7037037037037037 [2021-06-10 14:37:37,193 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 19 transitions. [2021-06-10 14:37:37,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 19 transitions. [2021-06-10 14:37:37,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:37:37,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 19 transitions. [2021-06-10 14:37:37,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2021-06-10 14:37:37,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2021-06-10 14:37:37,200 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2021-06-10 14:37:37,201 INFO L185 Difference]: Start difference. First operand has 10 places, 6 transitions, 18 flow. Second operand 3 states and 19 transitions. [2021-06-10 14:37:37,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 11 places, 5 transitions, 20 flow [2021-06-10 14:37:37,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 9 places, 5 transitions, 16 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-06-10 14:37:37,206 INFO L241 Difference]: Finished difference. Result has 9 places, 0 transitions, 0 flow [2021-06-10 14:37:37,207 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=9, PETRI_DIFFERENCE_MINUEND_FLOW=12, PETRI_DIFFERENCE_MINUEND_PLACES=7, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=9, PETRI_TRANSITIONS=0} [2021-06-10 14:37:37,208 INFO L343 CegarLoopForPetriNet]: 10 programPoint places, -1 predicate places. [2021-06-10 14:37:37,208 INFO L480 AbstractCegarLoop]: Abstraction has has 9 places, 0 transitions, 0 flow [2021-06-10 14:37:37,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2021-06-10 14:37:37,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-10 14:37:37,214 INFO L202 PluginConnector]: Adding new model example_epsilon_write.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.06 02:37:37 BasicIcfg [2021-06-10 14:37:37,214 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-10 14:37:37,216 INFO L168 Benchmark]: Toolchain (without parser) took 567.48 ms. Allocated memory is still 427.8 MB. Free memory was 408.0 MB in the beginning and 403.7 MB in the end (delta: 4.3 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.0 GB. [2021-06-10 14:37:37,217 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 427.8 MB. Free memory was 409.0 MB in the beginning and 408.9 MB in the end (delta: 70.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 14:37:37,218 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.13 ms. Allocated memory is still 427.8 MB. Free memory was 407.9 MB in the beginning and 406.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 14:37:37,218 INFO L168 Benchmark]: Boogie Preprocessor took 13.79 ms. Allocated memory is still 427.8 MB. Free memory was 406.5 MB in the beginning and 405.6 MB in the end (delta: 826.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 14:37:37,219 INFO L168 Benchmark]: RCFGBuilder took 169.91 ms. Allocated memory is still 427.8 MB. Free memory was 405.6 MB in the beginning and 397.4 MB in the end (delta: 8.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-10 14:37:37,220 INFO L168 Benchmark]: TraceAbstraction took 357.40 ms. Allocated memory is still 427.8 MB. Free memory was 396.9 MB in the beginning and 403.7 MB in the end (delta: -6.8 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 14:37:37,226 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 0.12 ms. Allocated memory is still 427.8 MB. Free memory was 409.0 MB in the beginning and 408.9 MB in the end (delta: 70.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 21.13 ms. Allocated memory is still 427.8 MB. Free memory was 407.9 MB in the beginning and 406.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.79 ms. Allocated memory is still 427.8 MB. Free memory was 406.5 MB in the beginning and 405.6 MB in the end (delta: 826.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 169.91 ms. Allocated memory is still 427.8 MB. Free memory was 405.6 MB in the beginning and 397.4 MB in the end (delta: 8.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 357.40 ms. Allocated memory is still 427.8 MB. Free memory was 396.9 MB in the beginning and 403.7 MB in the end (delta: -6.8 MB). There was no memory consumed. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 2.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 255.0ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 48.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 34.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 1 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 5.1ms SsaConstructionTime, 10.8ms SatisfiabilityAnalysisTime, 46.1ms InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 11 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...