/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/mcr/example_2.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 14:33:26,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 14:33:26,115 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 14:33:26,131 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 14:33:26,131 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 14:33:26,132 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 14:33:26,133 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 14:33:26,134 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 14:33:26,136 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 14:33:26,136 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 14:33:26,137 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 14:33:26,137 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-11 14:33:26,138 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 14:33:26,138 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 14:33:26,139 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 14:33:26,140 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 14:33:26,140 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 14:33:26,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 14:33:26,142 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 14:33:26,143 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 14:33:26,144 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 14:33:26,144 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 14:33:26,145 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 14:33:26,145 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 14:33:26,147 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-11 14:33:26,151 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 14:33:26,152 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 14:33:26,152 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 14:33:26,157 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 14:33:26,179 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 14:33:26,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 14:33:26,181 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 14:33:26,181 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 14:33:26,181 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 14:33:26,182 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 14:33:26,182 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 14:33:26,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 14:33:26,182 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 14:33:26,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 14:33:26,183 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 14:33:26,183 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 14:33:26,183 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 14:33:26,183 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 14:33:26,183 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 14:33:26,183 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 14:33:26,183 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 14:33:26,183 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 14:33:26,183 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 14:33:26,184 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 14:33:26,184 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 14:33:26,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 14:33:26,184 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 14:33:26,184 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 14:33:26,184 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 14:33:26,184 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 14:33:26,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 14:33:26,184 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-11 14:33:26,185 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 14:33:26,447 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 14:33:26,464 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 14:33:26,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 14:33:26,466 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 14:33:26,467 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 14:33:26,467 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_2.bpl [2021-03-11 14:33:26,467 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_2.bpl' [2021-03-11 14:33:26,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 14:33:26,515 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 14:33:26,516 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 14:33:26,516 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 14:33:26,516 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 14:33:26,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:33:26" (1/1) ... [2021-03-11 14:33:26,529 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:33:26" (1/1) ... [2021-03-11 14:33:26,535 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 14:33:26,536 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 14:33:26,537 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 14:33:26,537 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 14:33:26,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:33:26" (1/1) ... [2021-03-11 14:33:26,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:33:26" (1/1) ... [2021-03-11 14:33:26,542 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:33:26" (1/1) ... [2021-03-11 14:33:26,543 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:33:26" (1/1) ... [2021-03-11 14:33:26,544 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:33:26" (1/1) ... [2021-03-11 14:33:26,545 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:33:26" (1/1) ... [2021-03-11 14:33:26,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:33:26" (1/1) ... [2021-03-11 14:33:26,546 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 14:33:26,546 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 14:33:26,546 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 14:33:26,546 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 14:33:26,547 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:33:26" (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 14:33:26,604 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_1 given in one single declaration [2021-03-11 14:33:26,604 INFO L130 BoogieDeclarations]: Found specification of procedure set_1 [2021-03-11 14:33:26,604 INFO L138 BoogieDeclarations]: Found implementation of procedure set_1 [2021-03-11 14:33:26,604 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_0 given in one single declaration [2021-03-11 14:33:26,604 INFO L130 BoogieDeclarations]: Found specification of procedure set_0 [2021-03-11 14:33:26,604 INFO L138 BoogieDeclarations]: Found implementation of procedure set_0 [2021-03-11 14:33:26,605 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 14:33:26,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 14:33:26,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 14:33:26,605 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 14:33:26,678 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 14:33:26,678 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 14:33:26,679 INFO L202 PluginConnector]: Adding new model example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 02:33:26 BoogieIcfgContainer [2021-03-11 14:33:26,679 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 14:33:26,681 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 14:33:26,681 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 14:33:26,683 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 14:33:26,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:33:26" (1/2) ... [2021-03-11 14:33:26,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ecb6c60 and model type example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 02:33:26, skipping insertion in model container [2021-03-11 14:33:26,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 02:33:26" (2/2) ... [2021-03-11 14:33:26,684 INFO L111 eAbstractionObserver]: Analyzing ICFG example_2.bpl [2021-03-11 14:33:26,688 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-11 14:33:26,688 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 14:33:26,690 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 14:33:26,691 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 14:33:26,722 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-03-11 14:33:26,732 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-11 14:33:26,744 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 14:33:26,745 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-11 14:33:26,745 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 14:33:26,745 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 14:33:26,745 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 14:33:26,745 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 14:33:26,745 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 14:33:26,745 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 14:33:26,752 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 14:33:26,759 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 20 places, 15 transitions, 52 flow [2021-03-11 14:33:26,760 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 20 places, 15 transitions, 52 flow [2021-03-11 14:33:26,761 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 15 transitions, 52 flow [2021-03-11 14:33:26,773 INFO L129 PetriNetUnfolder]: 1/13 cut-off events. [2021-03-11 14:33:26,773 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-11 14:33:26,775 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 13 events. 1/13 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs, 0 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 4. Up to 3 conditions per place. [2021-03-11 14:33:26,775 INFO L116 LiptonReduction]: Number of co-enabled transitions 20 [2021-03-11 14:33:26,826 INFO L131 LiptonReduction]: Checked pairs total: 25 [2021-03-11 14:33:26,826 INFO L133 LiptonReduction]: Total number of compositions: 3 [2021-03-11 14:33:26,831 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 17 places, 12 transitions, 46 flow [2021-03-11 14:33:26,836 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 14 states, 12 states have (on average 1.5) internal successors, (18), 13 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) [2021-03-11 14:33:26,837 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5) internal successors, (18), 13 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) [2021-03-11 14:33:26,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-03-11 14:33:26,840 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 14:33:26,840 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-11 14:33:26,840 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 14:33:26,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 14:33:26,843 INFO L82 PathProgramCache]: Analyzing trace with hash 965510681, now seen corresponding path program 1 times [2021-03-11 14:33:26,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 14:33:26,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560677787] [2021-03-11 14:33:26,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 14:33:26,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 14:33:26,955 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:33:26,956 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 14:33:26,968 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:33:26,970 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 14:33:26,995 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-11 14:33:26,996 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 14:33:27,021 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 14:33:27,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560677787] [2021-03-11 14:33:27,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 14:33:27,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 14:33:27,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051561687] [2021-03-11 14:33:27,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 14:33:27,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 14:33:27,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 14:33:27,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 14:33:27,035 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5) internal successors, (18), 13 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) Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 14:33:27,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 14:33:27,078 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-03-11 14:33:27,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 14:33:27,079 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2021-03-11 14:33:27,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 14:33:27,084 INFO L225 Difference]: With dead ends: 18 [2021-03-11 14:33:27,084 INFO L226 Difference]: Without dead ends: 10 [2021-03-11 14:33:27,085 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-11 14:33:27,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-03-11 14:33:27,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-03-11 14:33:27,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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 14:33:27,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-03-11 14:33:27,103 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2021-03-11 14:33:27,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 14:33:27,103 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-03-11 14:33:27,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 14:33:27,103 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-03-11 14:33:27,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-03-11 14:33:27,104 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 14:33:27,104 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-11 14:33:27,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 14:33:27,104 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 14:33:27,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 14:33:27,106 INFO L82 PathProgramCache]: Analyzing trace with hash 800170631, now seen corresponding path program 2 times [2021-03-11 14:33:27,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 14:33:27,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816706248] [2021-03-11 14:33:27,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 14:33:27,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 14:33:27,142 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:33:27,142 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 14:33:27,143 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:33:27,145 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 14:33:27,153 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-11 14:33:27,154 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 14:33:27,160 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 14:33:27,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816706248] [2021-03-11 14:33:27,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 14:33:27,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 14:33:27,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521937554] [2021-03-11 14:33:27,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 14:33:27,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 14:33:27,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 14:33:27,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 14:33:27,164 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 14:33:27,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 14:33:27,176 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2021-03-11 14:33:27,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 14:33:27,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2021-03-11 14:33:27,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 14:33:27,176 INFO L225 Difference]: With dead ends: 9 [2021-03-11 14:33:27,177 INFO L226 Difference]: Without dead ends: 0 [2021-03-11 14:33:27,178 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-11 14:33:27,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-03-11 14:33:27,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-03-11 14:33:27,179 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 14:33:27,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-03-11 14:33:27,179 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2021-03-11 14:33:27,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 14:33:27,180 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-03-11 14:33:27,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 14:33:27,180 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-03-11 14:33:27,180 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-03-11 14:33:27,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 14:33:27,183 INFO L202 PluginConnector]: Adding new model example_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 02:33:27 BasicIcfg [2021-03-11 14:33:27,183 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 14:33:27,184 INFO L168 Benchmark]: Toolchain (without parser) took 671.17 ms. Allocated memory is still 354.4 MB. Free memory was 334.6 MB in the beginning and 311.8 MB in the end (delta: 22.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-03-11 14:33:27,184 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 354.4 MB. Free memory is still 335.5 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 14:33:27,186 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.05 ms. Allocated memory is still 354.4 MB. Free memory was 334.0 MB in the beginning and 332.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 14:33:27,186 INFO L168 Benchmark]: Boogie Preprocessor took 9.42 ms. Allocated memory is still 354.4 MB. Free memory was 332.5 MB in the beginning and 331.8 MB in the end (delta: 731.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 14:33:27,187 INFO L168 Benchmark]: RCFGBuilder took 133.27 ms. Allocated memory is still 354.4 MB. Free memory was 331.6 MB in the beginning and 323.6 MB in the end (delta: 8.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.0 GB. [2021-03-11 14:33:27,187 INFO L168 Benchmark]: TraceAbstraction took 502.17 ms. Allocated memory is still 354.4 MB. Free memory was 323.1 MB in the beginning and 311.8 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-03-11 14:33:27,192 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 354.4 MB. Free memory is still 335.5 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.05 ms. Allocated memory is still 354.4 MB. Free memory was 334.0 MB in the beginning and 332.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 9.42 ms. Allocated memory is still 354.4 MB. Free memory was 332.5 MB in the beginning and 331.8 MB in the end (delta: 731.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 133.27 ms. Allocated memory is still 354.4 MB. Free memory was 331.6 MB in the beginning and 323.6 MB in the end (delta: 8.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.0 GB. * TraceAbstraction took 502.17 ms. Allocated memory is still 354.4 MB. Free memory was 323.1 MB in the beginning and 311.8 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 65.8ms, 20 PlacesBefore, 17 PlacesAfterwards, 15 TransitionsBefore, 12 TransitionsAfterwards, 20 CoEnabledTransitionPairs, 1 FixpointIterations, 1 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 3 TotalNumberOfCompositions, 25 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 25, positive: 25, positive conditional: 0, positive unconditional: 25, 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: 13, positive: 13, positive conditional: 0, positive unconditional: 13, 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: 13, positive: 13, positive conditional: 0, positive unconditional: 13, 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: 25, positive: 12, positive conditional: 0, positive unconditional: 12, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 13, unknown conditional: 0, unknown unconditional: 13] , Statistics on independence cache: Total cache size (in pairs): 5, Positive cache size: 5, Positive conditional cache size: 0, Positive unconditional cache size: 5, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - PositiveResult [Line: 17]: 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: 437.8ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 4.3ms, AutomataDifference: 74.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 90.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 21 SDtfs, 21 SDslu, 17 SDs, 0 SdLazy, 6 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred 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: 11.2ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3.6ms SsaConstructionTime, 31.7ms SatisfiabilityAnalysisTime, 150.2ms InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 78 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...