/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-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/node-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 14:42:15,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 14:42:15,246 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 14:42:15,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 14:42:15,373 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-NoLbe.epf [2021-05-03 14:42:15,415 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 14:42:15,415 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 14:42:15,416 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 14:42:15,416 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 14:42:15,420 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 14:42:15,420 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 14:42:15,421 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 14:42:15,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 14:42:15,421 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 14:42:15,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 14:42:15,422 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 14:42:15,422 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 14:42:15,423 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 14:42:15,423 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 14:42:15,423 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 14:42:15,423 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 14:42:15,423 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 14:42:15,423 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 14:42:15,423 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 14:42:15,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 14:42:15,424 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 14:42:15,424 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 14:42:15,424 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 14:42:15,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 14:42:15,424 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 14:42:15,424 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 14:42:15,425 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 14:42:15,425 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 14:42:15,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 14:42:15,425 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 14:42:15,425 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 14:42:15,425 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 14:42:15,774 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 14:42:15,794 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 14:42:15,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 14:42:15,797 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 14:42:15,798 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 14:42:15,799 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/node-subst.wvr.bpl [2021-05-03 14:42:15,799 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/node-subst.wvr.bpl' [2021-05-03 14:42:15,840 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 14:42:15,842 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 14:42:15,843 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 14:42:15,843 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 14:42:15,843 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 14:42:15,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "node-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:42:15" (1/1) ... [2021-05-03 14:42:15,857 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "node-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:42:15" (1/1) ... [2021-05-03 14:42:15,864 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 14:42:15,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 14:42:15,866 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 14:42:15,866 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 14:42:15,873 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "node-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:42:15" (1/1) ... [2021-05-03 14:42:15,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "node-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:42:15" (1/1) ... [2021-05-03 14:42:15,874 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "node-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:42:15" (1/1) ... [2021-05-03 14:42:15,874 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "node-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:42:15" (1/1) ... [2021-05-03 14:42:15,876 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "node-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:42:15" (1/1) ... [2021-05-03 14:42:15,877 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "node-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:42:15" (1/1) ... [2021-05-03 14:42:15,877 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "node-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:42:15" (1/1) ... [2021-05-03 14:42:15,878 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 14:42:15,879 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 14:42:15,879 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 14:42:15,879 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 14:42:15,880 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "node-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:42:15" (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 [2021-05-03 14:42:15,933 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 14:42:15,934 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 14:42:15,934 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 14:42:15,934 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 14:42:15,934 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 14:42:15,935 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 14:42:15,935 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 14:42:15,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 14:42:15,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 14:42:15,935 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-03 14:42:15,935 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-03 14:42:15,935 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-03 14:42:15,936 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 14:42:16,231 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 14:42:16,232 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-03 14:42:16,236 INFO L202 PluginConnector]: Adding new model node-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 02:42:16 BoogieIcfgContainer [2021-05-03 14:42:16,237 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 14:42:16,238 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 14:42:16,239 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 14:42:16,242 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 14:42:16,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "node-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:42:15" (1/2) ... [2021-05-03 14:42:16,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1263b938 and model type node-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 02:42:16, skipping insertion in model container [2021-05-03 14:42:16,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "node-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 02:42:16" (2/2) ... [2021-05-03 14:42:16,259 INFO L111 eAbstractionObserver]: Analyzing ICFG node-subst.wvr.bpl [2021-05-03 14:42:16,265 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 14:42:16,266 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 14:42:16,286 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 14:42:16,287 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 14:42:16,375 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-03 14:42:16,406 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-03 14:42:16,422 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 14:42:16,422 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 14:42:16,422 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 14:42:16,422 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 14:42:16,422 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 14:42:16,422 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 14:42:16,423 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 14:42:16,423 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 14:42:16,430 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 19 transitions, 62 flow [2021-05-03 14:42:16,441 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 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) [2021-05-03 14:42:16,443 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 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) [2021-05-03 14:42:16,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:42:16,449 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:16,449 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:16,449 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:16,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:16,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1339387224, now seen corresponding path program 1 times [2021-05-03 14:42:16,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:16,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659356870] [2021-05-03 14:42:16,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:16,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:17,140 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2021-05-03 14:42:17,301 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2021-05-03 14:42:17,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:17,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659356870] [2021-05-03 14:42:17,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:42:17,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 14:42:17,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371184949] [2021-05-03 14:42:17,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:42:17,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:17,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:42:17,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:42:17,443 INFO L87 Difference]: Start difference. First operand has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 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 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-05-03 14:42:17,682 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-05-03 14:42:17,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:17,703 INFO L93 Difference]: Finished difference Result 93 states and 173 transitions. [2021-05-03 14:42:17,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:42:17,704 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-05-03 14:42:17,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:17,712 INFO L225 Difference]: With dead ends: 93 [2021-05-03 14:42:17,712 INFO L226 Difference]: Without dead ends: 72 [2021-05-03 14:42:17,713 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 628.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:42:17,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-03 14:42:17,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 55. [2021-05-03 14:42:17,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.0) internal successors, (108), 54 states have internal predecessors, (108), 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) [2021-05-03 14:42:17,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 108 transitions. [2021-05-03 14:42:17,803 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 108 transitions. Word has length 14 [2021-05-03 14:42:17,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:17,803 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 108 transitions. [2021-05-03 14:42:17,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-05-03 14:42:17,804 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 108 transitions. [2021-05-03 14:42:17,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:42:17,805 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:17,805 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:17,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 14:42:17,805 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:17,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:17,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1006513718, now seen corresponding path program 2 times [2021-05-03 14:42:17,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:17,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913104184] [2021-05-03 14:42:17,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:18,098 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-05-03 14:42:18,256 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 37 [2021-05-03 14:42:18,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:18,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913104184] [2021-05-03 14:42:18,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:42:18,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 14:42:18,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360408807] [2021-05-03 14:42:18,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:42:18,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:18,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:42:18,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:42:18,382 INFO L87 Difference]: Start difference. First operand 55 states and 108 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-05-03 14:42:18,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:18,554 INFO L93 Difference]: Finished difference Result 91 states and 166 transitions. [2021-05-03 14:42:18,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:42:18,555 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-05-03 14:42:18,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:18,556 INFO L225 Difference]: With dead ends: 91 [2021-05-03 14:42:18,556 INFO L226 Difference]: Without dead ends: 70 [2021-05-03 14:42:18,557 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 521.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:42:18,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-03 14:42:18,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 53. [2021-05-03 14:42:18,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.0) internal successors, (104), 52 states have internal predecessors, (104), 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) [2021-05-03 14:42:18,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 104 transitions. [2021-05-03 14:42:18,567 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 104 transitions. Word has length 14 [2021-05-03 14:42:18,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:18,568 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 104 transitions. [2021-05-03 14:42:18,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-05-03 14:42:18,568 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 104 transitions. [2021-05-03 14:42:18,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:42:18,573 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:18,573 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:18,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 14:42:18,573 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:18,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:18,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1302626698, now seen corresponding path program 3 times [2021-05-03 14:42:18,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:18,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775240582] [2021-05-03 14:42:18,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:18,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:19,026 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2021-05-03 14:42:19,171 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 27 [2021-05-03 14:42:19,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:19,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775240582] [2021-05-03 14:42:19,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:42:19,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 14:42:19,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612891987] [2021-05-03 14:42:19,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:42:19,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:19,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:42:19,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:42:19,180 INFO L87 Difference]: Start difference. First operand 53 states and 104 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-05-03 14:42:19,478 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-05-03 14:42:19,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:19,488 INFO L93 Difference]: Finished difference Result 85 states and 154 transitions. [2021-05-03 14:42:19,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:42:19,490 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-05-03 14:42:19,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:19,491 INFO L225 Difference]: With dead ends: 85 [2021-05-03 14:42:19,491 INFO L226 Difference]: Without dead ends: 64 [2021-05-03 14:42:19,492 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 687.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:42:19,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-03 14:42:19,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 47. [2021-05-03 14:42:19,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 46 states have internal predecessors, (88), 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) [2021-05-03 14:42:19,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 88 transitions. [2021-05-03 14:42:19,499 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 88 transitions. Word has length 14 [2021-05-03 14:42:19,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:19,500 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 88 transitions. [2021-05-03 14:42:19,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-05-03 14:42:19,500 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 88 transitions. [2021-05-03 14:42:19,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:42:19,500 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:19,501 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:19,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 14:42:19,501 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:19,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:19,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1148523496, now seen corresponding path program 4 times [2021-05-03 14:42:19,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:19,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106296283] [2021-05-03 14:42:19,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:19,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:19,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:19,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106296283] [2021-05-03 14:42:19,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:42:19,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 14:42:19,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562269299] [2021-05-03 14:42:19,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:42:19,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:19,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:42:19,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:42:19,815 INFO L87 Difference]: Start difference. First operand 47 states and 88 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-05-03 14:42:19,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:19,938 INFO L93 Difference]: Finished difference Result 73 states and 135 transitions. [2021-05-03 14:42:19,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:42:19,939 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-05-03 14:42:19,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:19,941 INFO L225 Difference]: With dead ends: 73 [2021-05-03 14:42:19,941 INFO L226 Difference]: Without dead ends: 40 [2021-05-03 14:42:19,942 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 249.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:42:19,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-03 14:42:19,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-03 14:42:19,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.8461538461538463) internal successors, (72), 39 states have internal predecessors, (72), 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) [2021-05-03 14:42:19,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 72 transitions. [2021-05-03 14:42:19,953 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 72 transitions. Word has length 14 [2021-05-03 14:42:19,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:19,953 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 72 transitions. [2021-05-03 14:42:19,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-05-03 14:42:19,954 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 72 transitions. [2021-05-03 14:42:19,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:42:19,955 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:19,955 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:19,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-03 14:42:19,955 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:19,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:19,956 INFO L82 PathProgramCache]: Analyzing trace with hash -625433448, now seen corresponding path program 5 times [2021-05-03 14:42:19,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:19,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922558261] [2021-05-03 14:42:19,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:19,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:20,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:20,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922558261] [2021-05-03 14:42:20,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:42:20,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 14:42:20,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265164183] [2021-05-03 14:42:20,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:42:20,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:20,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:42:20,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:42:20,348 INFO L87 Difference]: Start difference. First operand 40 states and 72 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-05-03 14:42:20,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:20,504 INFO L93 Difference]: Finished difference Result 55 states and 96 transitions. [2021-05-03 14:42:20,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:42:20,505 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-05-03 14:42:20,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:20,508 INFO L225 Difference]: With dead ends: 55 [2021-05-03 14:42:20,508 INFO L226 Difference]: Without dead ends: 36 [2021-05-03 14:42:20,508 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 358.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:42:20,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-03 14:42:20,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-03 14:42:20,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 35 states have internal predecessors, (62), 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) [2021-05-03 14:42:20,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 62 transitions. [2021-05-03 14:42:20,517 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 62 transitions. Word has length 14 [2021-05-03 14:42:20,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:20,517 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 62 transitions. [2021-05-03 14:42:20,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-05-03 14:42:20,517 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 62 transitions. [2021-05-03 14:42:20,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:42:20,518 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:20,518 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:20,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-03 14:42:20,518 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:20,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:20,519 INFO L82 PathProgramCache]: Analyzing trace with hash 2092192118, now seen corresponding path program 6 times [2021-05-03 14:42:20,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:20,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552144837] [2021-05-03 14:42:20,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:20,920 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 21 [2021-05-03 14:42:20,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:20,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552144837] [2021-05-03 14:42:20,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:42:20,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 14:42:20,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909493051] [2021-05-03 14:42:20,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:42:20,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:20,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:42:20,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:42:20,929 INFO L87 Difference]: Start difference. First operand 36 states and 62 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-05-03 14:42:21,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:21,055 INFO L93 Difference]: Finished difference Result 34 states and 60 transitions. [2021-05-03 14:42:21,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:42:21,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-05-03 14:42:21,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:21,056 INFO L225 Difference]: With dead ends: 34 [2021-05-03 14:42:21,056 INFO L226 Difference]: Without dead ends: 0 [2021-05-03 14:42:21,056 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 430.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:42:21,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-03 14:42:21,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-03 14:42:21,056 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) [2021-05-03 14:42:21,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-03 14:42:21,057 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-05-03 14:42:21,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:21,057 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-03 14:42:21,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-05-03 14:42:21,057 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-03 14:42:21,057 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-03 14:42:21,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-03 14:42:21,061 INFO L202 PluginConnector]: Adding new model node-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 02:42:21 BasicIcfg [2021-05-03 14:42:21,061 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 14:42:21,062 INFO L168 Benchmark]: Toolchain (without parser) took 5220.48 ms. Allocated memory was 329.3 MB in the beginning and 432.0 MB in the end (delta: 102.8 MB). Free memory was 308.6 MB in the beginning and 240.6 MB in the end (delta: 67.9 MB). Peak memory consumption was 171.8 MB. Max. memory is 16.0 GB. [2021-05-03 14:42:21,062 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 329.3 MB. Free memory was 309.8 MB in the beginning and 309.7 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 14:42:21,063 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.64 ms. Allocated memory is still 329.3 MB. Free memory was 308.5 MB in the beginning and 307.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 14:42:21,063 INFO L168 Benchmark]: Boogie Preprocessor took 13.17 ms. Allocated memory is still 329.3 MB. Free memory was 307.0 MB in the beginning and 306.0 MB in the end (delta: 956.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-03 14:42:21,063 INFO L168 Benchmark]: RCFGBuilder took 357.82 ms. Allocated memory is still 329.3 MB. Free memory was 305.9 MB in the beginning and 290.9 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-05-03 14:42:21,064 INFO L168 Benchmark]: TraceAbstraction took 4822.90 ms. Allocated memory was 329.3 MB in the beginning and 432.0 MB in the end (delta: 102.8 MB). Free memory was 290.4 MB in the beginning and 240.6 MB in the end (delta: 49.8 MB). Peak memory consumption was 155.0 MB. Max. memory is 16.0 GB. [2021-05-03 14:42:21,065 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 0.13 ms. Allocated memory is still 329.3 MB. Free memory was 309.8 MB in the beginning and 309.7 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 21.64 ms. Allocated memory is still 329.3 MB. Free memory was 308.5 MB in the beginning and 307.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.17 ms. Allocated memory is still 329.3 MB. Free memory was 307.0 MB in the beginning and 306.0 MB in the end (delta: 956.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 357.82 ms. Allocated memory is still 329.3 MB. Free memory was 305.9 MB in the beginning and 290.9 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 4822.90 ms. Allocated memory was 329.3 MB in the beginning and 432.0 MB in the end (delta: 102.8 MB). Free memory was 290.4 MB in the beginning and 240.6 MB in the end (delta: 49.8 MB). Peak memory consumption was 155.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 68]: 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 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4638.0ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 14.7ms, AutomataDifference: 1201.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 125 SDtfs, 157 SDslu, 191 SDs, 0 SdLazy, 80 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 96.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2875.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=0, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 96.6ms AutomataMinimizationTime, 6 MinimizatonAttempts, 51 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 13.8ms SsaConstructionTime, 203.0ms SatisfiabilityAnalysisTime, 2947.9ms InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 3158 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 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...