/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/simple-equiv.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 15:08:40,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 15:08:40,155 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 15:08:40,184 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 15:08:40,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 15:08:40,212 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 15:08:40,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 15:08:40,213 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-Separate.epf [2021-06-05 15:08:40,238 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 15:08:40,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 15:08:40,238 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 15:08:40,239 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 15:08:40,240 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 15:08:40,240 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 15:08:40,240 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 15:08:40,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 15:08:40,240 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 15:08:40,241 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 15:08:40,241 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 15:08:40,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 15:08:40,241 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 15:08:40,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 15:08:40,242 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 15:08:40,242 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 15:08:40,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 15:08:40,242 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 15:08:40,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 15:08:40,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 15:08:40,243 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 15:08:40,243 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 15:08:40,243 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 15:08:40,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:08:40,243 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 15:08:40,244 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 15:08:40,244 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 15:08:40,244 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 15:08:40,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 15:08:40,244 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 15:08:40,245 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 15:08:40,245 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 15:08:40,245 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 15:08:40,530 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 15:08:40,546 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 15:08:40,549 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 15:08:40,550 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 15:08:40,551 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 15:08:40,552 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/simple-equiv.wvr.bpl [2021-06-05 15:08:40,552 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/simple-equiv.wvr.bpl' [2021-06-05 15:08:40,575 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 15:08:40,576 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 15:08:40,577 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 15:08:40,577 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 15:08:40,577 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 15:08:40,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:08:40" (1/1) ... [2021-06-05 15:08:40,590 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:08:40" (1/1) ... [2021-06-05 15:08:40,595 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 15:08:40,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 15:08:40,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 15:08:40,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 15:08:40,603 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:08:40" (1/1) ... [2021-06-05 15:08:40,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:08:40" (1/1) ... [2021-06-05 15:08:40,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:08:40" (1/1) ... [2021-06-05 15:08:40,604 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:08:40" (1/1) ... [2021-06-05 15:08:40,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:08:40" (1/1) ... [2021-06-05 15:08:40,606 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:08:40" (1/1) ... [2021-06-05 15:08:40,607 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:08:40" (1/1) ... [2021-06-05 15:08:40,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 15:08:40,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 15:08:40,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 15:08:40,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 15:08:40,609 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:08:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:08:40,671 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 15:08:40,671 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 15:08:40,671 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 15:08:40,672 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 15:08:40,672 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 15:08:40,672 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 15:08:40,672 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 15:08:40,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 15:08:40,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 15:08:40,673 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 15:08:40,673 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 15:08:40,673 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 15:08:40,673 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 15:08:40,784 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 15:08:40,785 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 15:08:40,786 INFO L202 PluginConnector]: Adding new model simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:08:40 BoogieIcfgContainer [2021-06-05 15:08:40,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 15:08:40,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 15:08:40,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 15:08:40,789 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 15:08:40,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:08:40" (1/2) ... [2021-06-05 15:08:40,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b7da66c and model type simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:08:40, skipping insertion in model container [2021-06-05 15:08:40,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:08:40" (2/2) ... [2021-06-05 15:08:40,791 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-equiv.wvr.bpl [2021-06-05 15:08:40,796 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 15:08:40,796 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 15:08:40,796 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 15:08:40,796 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 15:08:40,833 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 15:08:40,851 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 15:08:40,867 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 15:08:40,867 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 15:08:40,867 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 15:08:40,867 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 15:08:40,867 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 15:08:40,868 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 15:08:40,868 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 15:08:40,868 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 15:08:40,875 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 23 transitions, 70 flow [2021-06-05 15:08:40,891 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 97 states, 95 states have (on average 2.168421052631579) internal successors, (206), 96 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:40,893 INFO L276 IsEmpty]: Start isEmpty. Operand has 97 states, 95 states have (on average 2.168421052631579) internal successors, (206), 96 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:40,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 15:08:40,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:40,899 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:40,899 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:40,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:40,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1536863355, now seen corresponding path program 1 times [2021-06-05 15:08:40,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:40,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384733272] [2021-06-05 15:08:40,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:40,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:41,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:41,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:41,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384733272] [2021-06-05 15:08:41,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384733272] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:08:41,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:08:41,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 15:08:41,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834960811] [2021-06-05 15:08:41,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:08:41,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:41,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:08:41,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:08:41,241 INFO L87 Difference]: Start difference. First operand has 97 states, 95 states have (on average 2.168421052631579) internal successors, (206), 96 states have internal predecessors, (206), 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 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:41,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:41,429 INFO L93 Difference]: Finished difference Result 153 states and 327 transitions. [2021-06-05 15:08:41,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:08:41,430 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 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) Word has length 18 [2021-06-05 15:08:41,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:41,442 INFO L225 Difference]: With dead ends: 153 [2021-06-05 15:08:41,442 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 15:08:41,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 144.5ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:08:41,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 15:08:41,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2021-06-05 15:08:41,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.021505376344086) internal successors, (188), 93 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:41,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 188 transitions. [2021-06-05 15:08:41,497 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 188 transitions. Word has length 18 [2021-06-05 15:08:41,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:41,498 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 188 transitions. [2021-06-05 15:08:41,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:41,498 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 188 transitions. [2021-06-05 15:08:41,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 15:08:41,501 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:41,502 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:41,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 15:08:41,502 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:41,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:41,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1013519567, now seen corresponding path program 2 times [2021-06-05 15:08:41,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:41,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530102060] [2021-06-05 15:08:41,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:41,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:41,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:41,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:41,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530102060] [2021-06-05 15:08:41,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530102060] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:08:41,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:08:41,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 15:08:41,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601160] [2021-06-05 15:08:41,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:08:41,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:41,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:08:41,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:08:41,591 INFO L87 Difference]: Start difference. First operand 94 states and 188 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:41,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:41,716 INFO L93 Difference]: Finished difference Result 160 states and 315 transitions. [2021-06-05 15:08:41,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:08:41,716 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 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) Word has length 18 [2021-06-05 15:08:41,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:41,720 INFO L225 Difference]: With dead ends: 160 [2021-06-05 15:08:41,720 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 15:08:41,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:08:41,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 15:08:41,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 99. [2021-06-05 15:08:41,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.0) internal successors, (196), 98 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:41,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 196 transitions. [2021-06-05 15:08:41,739 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 196 transitions. Word has length 18 [2021-06-05 15:08:41,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:41,739 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 196 transitions. [2021-06-05 15:08:41,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:41,740 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 196 transitions. [2021-06-05 15:08:41,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 15:08:41,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:41,745 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:41,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 15:08:41,746 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:41,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:41,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1151115245, now seen corresponding path program 3 times [2021-06-05 15:08:41,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:41,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173052374] [2021-06-05 15:08:41,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:41,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:41,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:41,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:41,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173052374] [2021-06-05 15:08:41,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173052374] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:08:41,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:08:41,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 15:08:41,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48495610] [2021-06-05 15:08:41,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:08:41,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:41,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:08:41,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:08:41,845 INFO L87 Difference]: Start difference. First operand 99 states and 196 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:41,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:41,963 INFO L93 Difference]: Finished difference Result 150 states and 299 transitions. [2021-06-05 15:08:41,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:08:41,964 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 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) Word has length 18 [2021-06-05 15:08:41,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:41,967 INFO L225 Difference]: With dead ends: 150 [2021-06-05 15:08:41,968 INFO L226 Difference]: Without dead ends: 75 [2021-06-05 15:08:41,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:08:41,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-05 15:08:41,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2021-06-05 15:08:41,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.9402985074626866) internal successors, (130), 67 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:41,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 130 transitions. [2021-06-05 15:08:41,983 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 130 transitions. Word has length 18 [2021-06-05 15:08:41,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:41,983 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 130 transitions. [2021-06-05 15:08:41,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:41,984 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 130 transitions. [2021-06-05 15:08:41,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 15:08:41,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:41,984 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:41,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 15:08:41,985 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:41,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:41,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1005944221, now seen corresponding path program 4 times [2021-06-05 15:08:41,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:41,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395187177] [2021-06-05 15:08:41,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:42,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:42,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:42,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395187177] [2021-06-05 15:08:42,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395187177] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:08:42,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:08:42,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 15:08:42,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150185107] [2021-06-05 15:08:42,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:08:42,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:42,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:08:42,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:08:42,085 INFO L87 Difference]: Start difference. First operand 68 states and 130 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:42,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:42,163 INFO L93 Difference]: Finished difference Result 90 states and 169 transitions. [2021-06-05 15:08:42,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:08:42,163 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 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) Word has length 18 [2021-06-05 15:08:42,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:42,164 INFO L225 Difference]: With dead ends: 90 [2021-06-05 15:08:42,164 INFO L226 Difference]: Without dead ends: 49 [2021-06-05 15:08:42,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:08:42,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-06-05 15:08:42,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-06-05 15:08:42,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.875) internal successors, (90), 48 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:42,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 90 transitions. [2021-06-05 15:08:42,169 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 90 transitions. Word has length 18 [2021-06-05 15:08:42,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:42,169 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 90 transitions. [2021-06-05 15:08:42,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:42,169 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 90 transitions. [2021-06-05 15:08:42,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 15:08:42,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:42,171 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:42,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 15:08:42,171 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:42,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:42,172 INFO L82 PathProgramCache]: Analyzing trace with hash -779439389, now seen corresponding path program 5 times [2021-06-05 15:08:42,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:42,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424817808] [2021-06-05 15:08:42,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:42,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:42,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:42,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:42,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424817808] [2021-06-05 15:08:42,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424817808] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:08:42,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:08:42,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 15:08:42,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611984840] [2021-06-05 15:08:42,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:08:42,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:42,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:08:42,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:08:42,280 INFO L87 Difference]: Start difference. First operand 49 states and 90 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:42,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:42,361 INFO L93 Difference]: Finished difference Result 74 states and 135 transitions. [2021-06-05 15:08:42,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:08:42,362 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 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) Word has length 18 [2021-06-05 15:08:42,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:42,362 INFO L225 Difference]: With dead ends: 74 [2021-06-05 15:08:42,363 INFO L226 Difference]: Without dead ends: 37 [2021-06-05 15:08:42,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:08:42,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-06-05 15:08:42,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-06-05 15:08:42,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 36 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:42,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 60 transitions. [2021-06-05 15:08:42,365 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 60 transitions. Word has length 18 [2021-06-05 15:08:42,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:42,365 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 60 transitions. [2021-06-05 15:08:42,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:42,365 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 60 transitions. [2021-06-05 15:08:42,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 15:08:42,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:42,366 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:42,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 15:08:42,366 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:42,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:42,367 INFO L82 PathProgramCache]: Analyzing trace with hash -593743005, now seen corresponding path program 6 times [2021-06-05 15:08:42,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:42,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728211311] [2021-06-05 15:08:42,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:42,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:42,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:42,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:42,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728211311] [2021-06-05 15:08:42,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728211311] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:08:42,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:08:42,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 15:08:42,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573127298] [2021-06-05 15:08:42,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:08:42,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:42,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:08:42,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:08:42,486 INFO L87 Difference]: Start difference. First operand 37 states and 60 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:42,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:42,546 INFO L93 Difference]: Finished difference Result 35 states and 58 transitions. [2021-06-05 15:08:42,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:08:42,547 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 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) Word has length 18 [2021-06-05 15:08:42,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:42,547 INFO L225 Difference]: With dead ends: 35 [2021-06-05 15:08:42,547 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 15:08:42,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:08:42,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 15:08:42,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 15:08:42,548 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) [2021-06-05 15:08:42,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 15:08:42,548 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2021-06-05 15:08:42,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:42,548 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 15:08:42,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:42,549 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 15:08:42,549 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 15:08:42,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 15:08:42,553 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 15:08:42,555 INFO L202 PluginConnector]: Adding new model simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 03:08:42 BasicIcfg [2021-06-05 15:08:42,555 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 15:08:42,556 INFO L168 Benchmark]: Toolchain (without parser) took 1980.25 ms. Allocated memory is still 377.5 MB. Free memory was 356.9 MB in the beginning and 341.1 MB in the end (delta: 15.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 16.0 GB. [2021-06-05 15:08:42,558 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 377.5 MB. Free memory was 358.0 MB in the beginning and 357.9 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:08:42,561 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.28 ms. Allocated memory is still 377.5 MB. Free memory was 356.8 MB in the beginning and 355.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 15:08:42,561 INFO L168 Benchmark]: Boogie Preprocessor took 10.89 ms. Allocated memory is still 377.5 MB. Free memory was 355.4 MB in the beginning and 354.5 MB in the end (delta: 853.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 15:08:42,562 INFO L168 Benchmark]: RCFGBuilder took 177.79 ms. Allocated memory is still 377.5 MB. Free memory was 354.5 MB in the beginning and 344.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-06-05 15:08:42,562 INFO L168 Benchmark]: TraceAbstraction took 1768.30 ms. Allocated memory is still 377.5 MB. Free memory was 344.4 MB in the beginning and 341.1 MB in the end (delta: 3.3 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.0 GB. [2021-06-05 15:08:42,565 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 0.14 ms. Allocated memory is still 377.5 MB. Free memory was 358.0 MB in the beginning and 357.9 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.28 ms. Allocated memory is still 377.5 MB. Free memory was 356.8 MB in the beginning and 355.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.89 ms. Allocated memory is still 377.5 MB. Free memory was 355.4 MB in the beginning and 354.5 MB in the end (delta: 853.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 177.79 ms. Allocated memory is still 377.5 MB. Free memory was 354.5 MB in the beginning and 344.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1768.30 ms. Allocated memory is still 377.5 MB. Free memory was 344.4 MB in the beginning and 341.1 MB in the end (delta: 3.3 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 45]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 39 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1684.4ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 17.9ms, AutomataDifference: 696.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 23.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 165 SDtfs, 164 SDslu, 510 SDs, 0 SdLazy, 446 SolverSat, 68 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 281.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 71 GetRequests, 10 SyntacticMatches, 9 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 497.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=2, InterpolantAutomatonStates: 53, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 80.4ms AutomataMinimizationTime, 6 MinimizatonAttempts, 51 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 14.2ms SsaConstructionTime, 58.1ms SatisfiabilityAnalysisTime, 651.6ms InterpolantComputationTime, 108 NumberOfCodeBlocks, 108 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 102 ConstructedInterpolants, 0 QuantifiedInterpolants, 638 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...