/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/parallel/simple-equiv.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 03:32:30,556 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 03:32:30,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 03:32:30,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 03:32:30,651 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 [2021-04-15 03:32:30,684 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 03:32:30,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 03:32:30,685 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 03:32:30,685 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 03:32:30,688 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 03:32:30,688 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 03:32:30,688 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 03:32:30,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 03:32:30,688 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 03:32:30,688 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 03:32:30,689 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 03:32:30,689 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 03:32:30,689 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 03:32:30,689 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 03:32:30,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 03:32:30,690 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 03:32:30,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 03:32:30,690 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 03:32:30,690 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 03:32:30,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 03:32:30,690 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 03:32:30,690 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 03:32:30,690 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 03:32:30,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 03:32:30,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 03:32:30,691 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 03:32:30,691 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 03:32:30,691 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 03:32:30,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 03:32:30,691 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 03:32:30,691 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 03:32:30,691 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 03:32:30,967 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 03:32:30,986 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 03:32:30,988 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 03:32:30,989 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 03:32:30,991 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 03:32:30,991 INFO L432 ainManager$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 [2021-04-15 03:32:30,992 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/simple-equiv.wvr.bpl' [2021-04-15 03:32:31,038 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 03:32:31,039 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 03:32:31,040 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 03:32:31,040 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 03:32:31,040 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 03:32:31,049 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 15.04 03:32:31" (1/1) ... [2021-04-15 03:32:31,054 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 15.04 03:32:31" (1/1) ... [2021-04-15 03:32:31,060 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 03:32:31,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 03:32:31,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 03:32:31,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 03:32:31,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:32:31" (1/1) ... [2021-04-15 03:32:31,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:32:31" (1/1) ... [2021-04-15 03:32:31,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:32:31" (1/1) ... [2021-04-15 03:32:31,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:32:31" (1/1) ... [2021-04-15 03:32:31,070 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:32:31" (1/1) ... [2021-04-15 03:32:31,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:32:31" (1/1) ... [2021-04-15 03:32:31,071 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:32:31" (1/1) ... [2021-04-15 03:32:31,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 03:32:31,073 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 03:32:31,073 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 03:32:31,073 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 03:32:31,074 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:32:31" (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 [2021-04-15 03:32:31,131 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 03:32:31,131 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 03:32:31,131 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 03:32:31,132 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 03:32:31,132 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 03:32:31,132 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 03:32:31,132 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 03:32:31,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 03:32:31,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 03:32:31,132 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-04-15 03:32:31,132 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-04-15 03:32:31,132 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-04-15 03:32:31,133 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-15 03:32:31,226 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 03:32:31,226 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-04-15 03:32:31,227 INFO L202 PluginConnector]: Adding new model simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 03:32:31 BoogieIcfgContainer [2021-04-15 03:32:31,227 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 03:32:31,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 03:32:31,229 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 03:32:31,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 03:32:31,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:32:31" (1/2) ... [2021-04-15 03:32:31,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66110d7 and model type simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 03:32:31, skipping insertion in model container [2021-04-15 03:32:31,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 03:32:31" (2/2) ... [2021-04-15 03:32:31,233 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-equiv.wvr.bpl [2021-04-15 03:32:31,237 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 03:32:31,237 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 03:32:31,239 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 03:32:31,240 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 03:32:31,280 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-04-15 03:32:31,292 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-04-15 03:32:31,305 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 03:32:31,305 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 03:32:31,305 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 03:32:31,305 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 03:32:31,305 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 03:32:31,305 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 03:32:31,305 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 03:32:31,305 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 03:32:31,311 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 23 transitions, 70 flow [2021-04-15 03:32:31,323 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) [2021-04-15 03:32:31,325 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) [2021-04-15 03:32:31,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 03:32:31,330 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:31,330 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:31,330 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:31,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:31,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1536863355, now seen corresponding path program 1 times [2021-04-15 03:32:31,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:31,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512800225] [2021-04-15 03:32:31,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:31,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:31,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:31,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512800225] [2021-04-15 03:32:31,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:32:31,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 03:32:31,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975742834] [2021-04-15 03:32:31,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:32:31,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:31,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:32:31,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:32:31,688 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) [2021-04-15 03:32:31,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:31,895 INFO L93 Difference]: Finished difference Result 153 states and 327 transitions. [2021-04-15 03:32:31,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:32:31,897 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 [2021-04-15 03:32:31,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:31,903 INFO L225 Difference]: With dead ends: 153 [2021-04-15 03:32:31,903 INFO L226 Difference]: Without dead ends: 106 [2021-04-15 03:32:31,904 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 140.5ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:32:31,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-04-15 03:32:31,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2021-04-15 03:32:31,940 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) [2021-04-15 03:32:31,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 188 transitions. [2021-04-15 03:32:31,942 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 188 transitions. Word has length 18 [2021-04-15 03:32:31,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:31,942 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 188 transitions. [2021-04-15 03:32:31,943 INFO L481 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) [2021-04-15 03:32:31,943 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 188 transitions. [2021-04-15 03:32:31,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 03:32:31,944 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:31,944 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:31,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 03:32:31,944 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:31,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:31,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1013519567, now seen corresponding path program 2 times [2021-04-15 03:32:31,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:31,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110687264] [2021-04-15 03:32:31,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:31,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:32,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:32,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110687264] [2021-04-15 03:32:32,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:32:32,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 03:32:32,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283455452] [2021-04-15 03:32:32,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:32:32,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:32,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:32:32,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:32:32,037 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) [2021-04-15 03:32:32,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:32,145 INFO L93 Difference]: Finished difference Result 160 states and 315 transitions. [2021-04-15 03:32:32,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:32:32,146 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 [2021-04-15 03:32:32,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:32,147 INFO L225 Difference]: With dead ends: 160 [2021-04-15 03:32:32,147 INFO L226 Difference]: Without dead ends: 131 [2021-04-15 03:32:32,148 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:32:32,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-04-15 03:32:32,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 99. [2021-04-15 03:32:32,154 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) [2021-04-15 03:32:32,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 196 transitions. [2021-04-15 03:32:32,155 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 196 transitions. Word has length 18 [2021-04-15 03:32:32,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:32,156 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 196 transitions. [2021-04-15 03:32:32,156 INFO L481 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) [2021-04-15 03:32:32,156 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 196 transitions. [2021-04-15 03:32:32,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 03:32:32,157 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:32,157 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:32,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-15 03:32:32,157 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:32,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:32,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1151115245, now seen corresponding path program 3 times [2021-04-15 03:32:32,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:32,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330354149] [2021-04-15 03:32:32,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:32,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:32,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330354149] [2021-04-15 03:32:32,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:32:32,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 03:32:32,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178226142] [2021-04-15 03:32:32,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:32:32,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:32,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:32:32,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:32:32,250 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) [2021-04-15 03:32:32,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:32,377 INFO L93 Difference]: Finished difference Result 150 states and 299 transitions. [2021-04-15 03:32:32,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:32:32,377 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 [2021-04-15 03:32:32,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:32,381 INFO L225 Difference]: With dead ends: 150 [2021-04-15 03:32:32,381 INFO L226 Difference]: Without dead ends: 75 [2021-04-15 03:32:32,382 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 72.1ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:32:32,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-04-15 03:32:32,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2021-04-15 03:32:32,397 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) [2021-04-15 03:32:32,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 130 transitions. [2021-04-15 03:32:32,397 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 130 transitions. Word has length 18 [2021-04-15 03:32:32,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:32,397 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 130 transitions. [2021-04-15 03:32:32,398 INFO L481 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) [2021-04-15 03:32:32,398 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 130 transitions. [2021-04-15 03:32:32,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 03:32:32,398 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:32,398 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:32,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-15 03:32:32,399 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:32,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:32,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1005944221, now seen corresponding path program 4 times [2021-04-15 03:32:32,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:32,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087439840] [2021-04-15 03:32:32,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:32,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:32,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087439840] [2021-04-15 03:32:32,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:32:32,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 03:32:32,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477465998] [2021-04-15 03:32:32,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:32:32,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:32,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:32:32,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:32:32,479 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) [2021-04-15 03:32:32,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:32,569 INFO L93 Difference]: Finished difference Result 90 states and 169 transitions. [2021-04-15 03:32:32,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:32:32,570 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 [2021-04-15 03:32:32,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:32,572 INFO L225 Difference]: With dead ends: 90 [2021-04-15 03:32:32,572 INFO L226 Difference]: Without dead ends: 49 [2021-04-15 03:32:32,573 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:32:32,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-04-15 03:32:32,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-04-15 03:32:32,581 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) [2021-04-15 03:32:32,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 90 transitions. [2021-04-15 03:32:32,583 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 90 transitions. Word has length 18 [2021-04-15 03:32:32,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:32,583 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 90 transitions. [2021-04-15 03:32:32,584 INFO L481 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) [2021-04-15 03:32:32,584 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 90 transitions. [2021-04-15 03:32:32,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 03:32:32,588 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:32,588 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:32,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-15 03:32:32,588 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:32,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:32,589 INFO L82 PathProgramCache]: Analyzing trace with hash -779439389, now seen corresponding path program 5 times [2021-04-15 03:32:32,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:32,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194483631] [2021-04-15 03:32:32,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:32,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:32,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194483631] [2021-04-15 03:32:32,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:32:32,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 03:32:32,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463835045] [2021-04-15 03:32:32,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:32:32,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:32,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:32:32,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:32:32,687 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) [2021-04-15 03:32:32,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:32,752 INFO L93 Difference]: Finished difference Result 74 states and 135 transitions. [2021-04-15 03:32:32,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 03:32:32,752 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 [2021-04-15 03:32:32,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:32,753 INFO L225 Difference]: With dead ends: 74 [2021-04-15 03:32:32,753 INFO L226 Difference]: Without dead ends: 37 [2021-04-15 03:32:32,753 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 53.9ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:32:32,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-04-15 03:32:32,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-04-15 03:32:32,755 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) [2021-04-15 03:32:32,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 60 transitions. [2021-04-15 03:32:32,755 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 60 transitions. Word has length 18 [2021-04-15 03:32:32,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:32,755 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 60 transitions. [2021-04-15 03:32:32,755 INFO L481 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) [2021-04-15 03:32:32,756 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 60 transitions. [2021-04-15 03:32:32,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 03:32:32,756 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:32,756 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:32,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-04-15 03:32:32,756 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:32,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:32,757 INFO L82 PathProgramCache]: Analyzing trace with hash -593743005, now seen corresponding path program 6 times [2021-04-15 03:32:32,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:32,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011846436] [2021-04-15 03:32:32,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:32,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:32,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:32,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011846436] [2021-04-15 03:32:32,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:32:32,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 03:32:32,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965474910] [2021-04-15 03:32:32,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:32:32,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:32,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:32:32,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:32:32,812 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) [2021-04-15 03:32:32,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:32,863 INFO L93 Difference]: Finished difference Result 35 states and 58 transitions. [2021-04-15 03:32:32,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 03:32:32,864 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 [2021-04-15 03:32:32,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:32,865 INFO L225 Difference]: With dead ends: 35 [2021-04-15 03:32:32,865 INFO L226 Difference]: Without dead ends: 0 [2021-04-15 03:32:32,865 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:32:32,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-04-15 03:32:32,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-04-15 03:32:32,865 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) [2021-04-15 03:32:32,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-04-15 03:32:32,865 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2021-04-15 03:32:32,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:32,865 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-04-15 03:32:32,866 INFO L481 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) [2021-04-15 03:32:32,866 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-04-15 03:32:32,866 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-04-15 03:32:32,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-04-15 03:32:32,869 INFO L202 PluginConnector]: Adding new model simple-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 03:32:32 BasicIcfg [2021-04-15 03:32:32,869 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 03:32:32,870 INFO L168 Benchmark]: Toolchain (without parser) took 1831.13 ms. Allocated memory was 255.9 MB in the beginning and 360.7 MB in the end (delta: 104.9 MB). Free memory was 236.7 MB in the beginning and 289.9 MB in the end (delta: -53.2 MB). Peak memory consumption was 50.8 MB. Max. memory is 16.0 GB. [2021-04-15 03:32:32,870 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 03:32:32,871 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.21 ms. Allocated memory is still 255.9 MB. Free memory was 236.7 MB in the beginning and 235.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-15 03:32:32,871 INFO L168 Benchmark]: Boogie Preprocessor took 11.31 ms. Allocated memory is still 255.9 MB. Free memory was 235.2 MB in the beginning and 234.4 MB in the end (delta: 777.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 03:32:32,871 INFO L168 Benchmark]: RCFGBuilder took 154.47 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 225.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-04-15 03:32:32,871 INFO L168 Benchmark]: TraceAbstraction took 1640.86 ms. Allocated memory was 255.9 MB in the beginning and 360.7 MB in the end (delta: 104.9 MB). Free memory was 224.9 MB in the beginning and 289.9 MB in the end (delta: -65.1 MB). Peak memory consumption was 38.2 MB. Max. memory is 16.0 GB. [2021-04-15 03:32:32,872 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.21 ms. Allocated memory is still 255.9 MB. Free memory was 236.7 MB in the beginning and 235.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.31 ms. Allocated memory is still 255.9 MB. Free memory was 235.2 MB in the beginning and 234.4 MB in the end (delta: 777.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 154.47 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 225.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1640.86 ms. Allocated memory was 255.9 MB in the beginning and 360.7 MB in the end (delta: 104.9 MB). Free memory was 224.9 MB in the beginning and 289.9 MB in the end (delta: -65.1 MB). Peak memory consumption was 38.2 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1563.2ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 12.9ms, AutomataDifference: 702.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 165 SDtfs, 164 SDslu, 510 SDs, 0 SdLazy, 446 SolverSat, 68 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 254.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 71 GetRequests, 10 SyntacticMatches, 9 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 487.6ms 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: 61.8ms AutomataMinimizationTime, 6 MinimizatonAttempts, 51 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 14.2ms SsaConstructionTime, 75.7ms SatisfiabilityAnalysisTime, 554.1ms 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...