/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/ticket-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 18:04:10,739 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 18:04:10,741 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 18:04:10,777 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 18:04:10,838 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 [2021-02-19 18:04:10,873 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 18:04:10,874 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 18:04:10,874 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 18:04:10,874 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 18:04:10,877 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 18:04:10,877 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 18:04:10,877 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 18:04:10,877 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 18:04:10,877 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 18:04:10,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 18:04:10,878 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 18:04:10,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 18:04:10,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 18:04:10,879 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 18:04:10,879 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 18:04:10,879 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 18:04:10,879 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 18:04:10,879 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 18:04:10,879 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 18:04:10,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 18:04:10,880 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 18:04:10,880 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 18:04:10,880 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 18:04:10,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 18:04:10,880 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 18:04:10,880 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 18:04:10,880 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 18:04:10,881 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 18:04:10,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 18:04:10,881 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 18:04:10,881 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 18:04:10,881 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 18:04:11,157 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 18:04:11,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 18:04:11,181 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 18:04:11,182 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 18:04:11,183 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 18:04:11,184 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/ticket-3.wvr.bpl [2021-02-19 18:04:11,184 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/ticket-3.wvr.bpl' [2021-02-19 18:04:11,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 18:04:11,209 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 18:04:11,210 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 18:04:11,210 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 18:04:11,210 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 18:04:11,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:04:11" (1/1) ... [2021-02-19 18:04:11,229 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:04:11" (1/1) ... [2021-02-19 18:04:11,237 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 18:04:11,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 18:04:11,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 18:04:11,239 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 18:04:11,246 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:04:11" (1/1) ... [2021-02-19 18:04:11,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:04:11" (1/1) ... [2021-02-19 18:04:11,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:04:11" (1/1) ... [2021-02-19 18:04:11,247 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:04:11" (1/1) ... [2021-02-19 18:04:11,249 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:04:11" (1/1) ... [2021-02-19 18:04:11,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:04:11" (1/1) ... [2021-02-19 18:04:11,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:04:11" (1/1) ... [2021-02-19 18:04:11,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 18:04:11,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 18:04:11,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 18:04:11,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 18:04:11,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:04:11" (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 [2021-02-19 18:04:11,311 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 18:04:11,311 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 18:04:11,311 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 18:04:11,312 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 18:04:11,312 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 18:04:11,312 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 18:04:11,312 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 18:04:11,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 18:04:11,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 18:04:11,312 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-02-19 18:04:11,312 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-02-19 18:04:11,312 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-02-19 18:04:11,313 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 18:04:11,465 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 18:04:11,465 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 18:04:11,466 INFO L202 PluginConnector]: Adding new model ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:04:11 BoogieIcfgContainer [2021-02-19 18:04:11,466 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 18:04:11,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 18:04:11,468 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 18:04:11,470 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 18:04:11,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:04:11" (1/2) ... [2021-02-19 18:04:11,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c73120c and model type ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 06:04:11, skipping insertion in model container [2021-02-19 18:04:11,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:04:11" (2/2) ... [2021-02-19 18:04:11,472 INFO L111 eAbstractionObserver]: Analyzing ICFG ticket-3.wvr.bpl [2021-02-19 18:04:11,477 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 18:04:11,477 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 18:04:11,480 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 18:04:11,480 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 18:04:11,515 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-02-19 18:04:11,553 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-02-19 18:04:11,584 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 18:04:11,584 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 18:04:11,585 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 18:04:11,585 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 18:04:11,585 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 18:04:11,585 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 18:04:11,585 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 18:04:11,585 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 18:04:11,595 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 30 transitions, 84 flow [2021-02-19 18:04:11,648 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 350 states, 348 states have (on average 2.5172413793103448) internal successors, (876), 349 states have internal predecessors, (876), 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) [2021-02-19 18:04:11,651 INFO L276 IsEmpty]: Start isEmpty. Operand has 350 states, 348 states have (on average 2.5172413793103448) internal successors, (876), 349 states have internal predecessors, (876), 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) [2021-02-19 18:04:11,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:04:11,669 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:04:11,670 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:04:11,670 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:04:11,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:04:11,679 INFO L82 PathProgramCache]: Analyzing trace with hash 738695753, now seen corresponding path program 1 times [2021-02-19 18:04:11,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:04:11,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612581115] [2021-02-19 18:04:11,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:04:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:04:11,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:04:11,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612581115] [2021-02-19 18:04:11,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:04:11,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 18:04:11,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089623234] [2021-02-19 18:04:11,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:04:11,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:04:11,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:04:11,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:04:11,869 INFO L87 Difference]: Start difference. First operand has 350 states, 348 states have (on average 2.5172413793103448) internal successors, (876), 349 states have internal predecessors, (876), 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 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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) [2021-02-19 18:04:12,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:04:12,017 INFO L93 Difference]: Finished difference Result 667 states and 1586 transitions. [2021-02-19 18:04:12,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:04:12,019 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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 25 [2021-02-19 18:04:12,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:04:12,041 INFO L225 Difference]: With dead ends: 667 [2021-02-19 18:04:12,041 INFO L226 Difference]: Without dead ends: 667 [2021-02-19 18:04:12,042 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:04:12,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-02-19 18:04:12,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 415. [2021-02-19 18:04:12,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.4589371980676327) internal successors, (1018), 414 states have internal predecessors, (1018), 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) [2021-02-19 18:04:12,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1018 transitions. [2021-02-19 18:04:12,106 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1018 transitions. Word has length 25 [2021-02-19 18:04:12,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:04:12,106 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 1018 transitions. [2021-02-19 18:04:12,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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) [2021-02-19 18:04:12,107 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1018 transitions. [2021-02-19 18:04:12,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:04:12,108 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:04:12,109 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:04:12,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 18:04:12,109 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:04:12,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:04:12,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1243410043, now seen corresponding path program 2 times [2021-02-19 18:04:12,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:04:12,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280660243] [2021-02-19 18:04:12,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:04:12,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:04:12,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:04:12,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280660243] [2021-02-19 18:04:12,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:04:12,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 18:04:12,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797808962] [2021-02-19 18:04:12,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:04:12,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:04:12,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:04:12,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:04:12,263 INFO L87 Difference]: Start difference. First operand 415 states and 1018 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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) [2021-02-19 18:04:12,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:04:12,300 INFO L93 Difference]: Finished difference Result 571 states and 1381 transitions. [2021-02-19 18:04:12,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:04:12,301 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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 25 [2021-02-19 18:04:12,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:04:12,303 INFO L225 Difference]: With dead ends: 571 [2021-02-19 18:04:12,303 INFO L226 Difference]: Without dead ends: 311 [2021-02-19 18:04:12,304 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:04:12,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-02-19 18:04:12,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2021-02-19 18:04:12,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.3) internal successors, (713), 310 states have internal predecessors, (713), 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) [2021-02-19 18:04:12,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 713 transitions. [2021-02-19 18:04:12,329 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 713 transitions. Word has length 25 [2021-02-19 18:04:12,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:04:12,330 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 713 transitions. [2021-02-19 18:04:12,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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) [2021-02-19 18:04:12,330 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 713 transitions. [2021-02-19 18:04:12,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:04:12,332 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:04:12,332 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:04:12,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 18:04:12,333 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:04:12,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:04:12,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1011681675, now seen corresponding path program 3 times [2021-02-19 18:04:12,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:04:12,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634090506] [2021-02-19 18:04:12,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:04:12,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:04:12,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:04:12,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634090506] [2021-02-19 18:04:12,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:04:12,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 18:04:12,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715573614] [2021-02-19 18:04:12,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:04:12,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:04:12,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:04:12,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:04:12,396 INFO L87 Difference]: Start difference. First operand 311 states and 713 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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) [2021-02-19 18:04:12,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:04:12,478 INFO L93 Difference]: Finished difference Result 353 states and 754 transitions. [2021-02-19 18:04:12,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:04:12,479 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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 25 [2021-02-19 18:04:12,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:04:12,481 INFO L225 Difference]: With dead ends: 353 [2021-02-19 18:04:12,481 INFO L226 Difference]: Without dead ends: 333 [2021-02-19 18:04:12,481 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:04:12,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-02-19 18:04:12,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 243. [2021-02-19 18:04:12,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.169421487603306) internal successors, (525), 242 states have internal predecessors, (525), 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) [2021-02-19 18:04:12,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 525 transitions. [2021-02-19 18:04:12,489 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 525 transitions. Word has length 25 [2021-02-19 18:04:12,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:04:12,489 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 525 transitions. [2021-02-19 18:04:12,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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) [2021-02-19 18:04:12,490 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 525 transitions. [2021-02-19 18:04:12,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:04:12,490 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:04:12,490 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:04:12,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 18:04:12,491 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:04:12,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:04:12,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1911692791, now seen corresponding path program 4 times [2021-02-19 18:04:12,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:04:12,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015421491] [2021-02-19 18:04:12,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:04:12,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:04:12,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:04:12,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015421491] [2021-02-19 18:04:12,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:04:12,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 18:04:12,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322739937] [2021-02-19 18:04:12,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:04:12,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:04:12,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:04:12,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:04:12,568 INFO L87 Difference]: Start difference. First operand 243 states and 525 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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) [2021-02-19 18:04:12,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:04:12,645 INFO L93 Difference]: Finished difference Result 345 states and 726 transitions. [2021-02-19 18:04:12,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:04:12,645 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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 25 [2021-02-19 18:04:12,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:04:12,647 INFO L225 Difference]: With dead ends: 345 [2021-02-19 18:04:12,648 INFO L226 Difference]: Without dead ends: 327 [2021-02-19 18:04:12,648 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:04:12,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-02-19 18:04:12,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 238. [2021-02-19 18:04:12,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.1181434599156117) internal successors, (502), 237 states have internal predecessors, (502), 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) [2021-02-19 18:04:12,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 502 transitions. [2021-02-19 18:04:12,656 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 502 transitions. Word has length 25 [2021-02-19 18:04:12,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:04:12,656 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 502 transitions. [2021-02-19 18:04:12,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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) [2021-02-19 18:04:12,657 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 502 transitions. [2021-02-19 18:04:12,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:04:12,657 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:04:12,657 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:04:12,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 18:04:12,658 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:04:12,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:04:12,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1663273015, now seen corresponding path program 5 times [2021-02-19 18:04:12,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:04:12,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645772839] [2021-02-19 18:04:12,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:04:12,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:04:12,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:04:12,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645772839] [2021-02-19 18:04:12,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:04:12,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 18:04:12,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192955247] [2021-02-19 18:04:12,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:04:12,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:04:12,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:04:12,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:04:12,720 INFO L87 Difference]: Start difference. First operand 238 states and 502 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 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) [2021-02-19 18:04:12,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:04:12,836 INFO L93 Difference]: Finished difference Result 354 states and 725 transitions. [2021-02-19 18:04:12,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 18:04:12,837 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 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 25 [2021-02-19 18:04:12,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:04:12,838 INFO L225 Difference]: With dead ends: 354 [2021-02-19 18:04:12,839 INFO L226 Difference]: Without dead ends: 330 [2021-02-19 18:04:12,839 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:04:12,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-02-19 18:04:12,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 234. [2021-02-19 18:04:12,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.07725321888412) internal successors, (484), 233 states have internal predecessors, (484), 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) [2021-02-19 18:04:12,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 484 transitions. [2021-02-19 18:04:12,846 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 484 transitions. Word has length 25 [2021-02-19 18:04:12,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:04:12,846 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 484 transitions. [2021-02-19 18:04:12,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 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) [2021-02-19 18:04:12,846 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 484 transitions. [2021-02-19 18:04:12,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:04:12,847 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:04:12,847 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:04:12,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 18:04:12,847 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:04:12,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:04:12,848 INFO L82 PathProgramCache]: Analyzing trace with hash 122760139, now seen corresponding path program 6 times [2021-02-19 18:04:12,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:04:12,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681912624] [2021-02-19 18:04:12,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:04:12,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:04:12,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:04:12,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681912624] [2021-02-19 18:04:12,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:04:12,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 18:04:12,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974830561] [2021-02-19 18:04:12,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:04:12,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:04:12,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:04:12,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:04:12,884 INFO L87 Difference]: Start difference. First operand 234 states and 484 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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) [2021-02-19 18:04:12,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:04:12,953 INFO L93 Difference]: Finished difference Result 322 states and 654 transitions. [2021-02-19 18:04:12,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:04:12,953 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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 25 [2021-02-19 18:04:12,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:04:12,956 INFO L225 Difference]: With dead ends: 322 [2021-02-19 18:04:12,956 INFO L226 Difference]: Without dead ends: 306 [2021-02-19 18:04:12,957 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:04:12,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-02-19 18:04:12,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 226. [2021-02-19 18:04:12,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.057777777777778) internal successors, (463), 225 states have internal predecessors, (463), 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) [2021-02-19 18:04:12,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 463 transitions. [2021-02-19 18:04:12,964 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 463 transitions. Word has length 25 [2021-02-19 18:04:12,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:04:12,964 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 463 transitions. [2021-02-19 18:04:12,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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) [2021-02-19 18:04:12,965 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 463 transitions. [2021-02-19 18:04:12,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:04:12,967 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:04:12,967 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:04:12,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-19 18:04:12,968 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:04:12,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:04:12,969 INFO L82 PathProgramCache]: Analyzing trace with hash 846536405, now seen corresponding path program 7 times [2021-02-19 18:04:12,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:04:12,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230525415] [2021-02-19 18:04:12,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:04:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:04:13,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:04:13,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230525415] [2021-02-19 18:04:13,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:04:13,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 18:04:13,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764025373] [2021-02-19 18:04:13,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:04:13,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:04:13,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:04:13,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:04:13,040 INFO L87 Difference]: Start difference. First operand 226 states and 463 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 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) [2021-02-19 18:04:13,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:04:13,145 INFO L93 Difference]: Finished difference Result 322 states and 647 transitions. [2021-02-19 18:04:13,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 18:04:13,146 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 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 25 [2021-02-19 18:04:13,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:04:13,147 INFO L225 Difference]: With dead ends: 322 [2021-02-19 18:04:13,147 INFO L226 Difference]: Without dead ends: 286 [2021-02-19 18:04:13,148 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:04:13,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-02-19 18:04:13,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 206. [2021-02-19 18:04:13,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.0585365853658537) internal successors, (422), 205 states have internal predecessors, (422), 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) [2021-02-19 18:04:13,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 422 transitions. [2021-02-19 18:04:13,154 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 422 transitions. Word has length 25 [2021-02-19 18:04:13,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:04:13,156 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 422 transitions. [2021-02-19 18:04:13,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 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) [2021-02-19 18:04:13,156 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 422 transitions. [2021-02-19 18:04:13,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:04:13,157 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:04:13,157 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:04:13,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-19 18:04:13,157 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:04:13,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:04:13,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1526527551, now seen corresponding path program 8 times [2021-02-19 18:04:13,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:04:13,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084061132] [2021-02-19 18:04:13,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:04:13,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:04:13,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:04:13,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084061132] [2021-02-19 18:04:13,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:04:13,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:04:13,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440820739] [2021-02-19 18:04:13,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 18:04:13,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:04:13,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 18:04:13,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:04:13,205 INFO L87 Difference]: Start difference. First operand 206 states and 422 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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) [2021-02-19 18:04:13,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:04:13,255 INFO L93 Difference]: Finished difference Result 93 states and 166 transitions. [2021-02-19 18:04:13,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:04:13,255 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 25 [2021-02-19 18:04:13,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:04:13,256 INFO L225 Difference]: With dead ends: 93 [2021-02-19 18:04:13,256 INFO L226 Difference]: Without dead ends: 69 [2021-02-19 18:04:13,257 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:04:13,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-02-19 18:04:13,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-02-19 18:04:13,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.8088235294117647) internal successors, (123), 68 states have internal predecessors, (123), 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) [2021-02-19 18:04:13,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 123 transitions. [2021-02-19 18:04:13,259 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 123 transitions. Word has length 25 [2021-02-19 18:04:13,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:04:13,260 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 123 transitions. [2021-02-19 18:04:13,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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) [2021-02-19 18:04:13,260 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 123 transitions. [2021-02-19 18:04:13,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:04:13,261 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:04:13,262 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:04:13,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-19 18:04:13,262 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:04:13,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:04:13,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1241460791, now seen corresponding path program 9 times [2021-02-19 18:04:13,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:04:13,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158047910] [2021-02-19 18:04:13,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:04:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:04:13,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:04:13,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158047910] [2021-02-19 18:04:13,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:04:13,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 18:04:13,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628010289] [2021-02-19 18:04:13,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:04:13,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:04:13,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:04:13,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:04:13,308 INFO L87 Difference]: Start difference. First operand 69 states and 123 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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) [2021-02-19 18:04:13,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:04:13,353 INFO L93 Difference]: Finished difference Result 111 states and 204 transitions. [2021-02-19 18:04:13,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:04:13,354 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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 25 [2021-02-19 18:04:13,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:04:13,356 INFO L225 Difference]: With dead ends: 111 [2021-02-19 18:04:13,356 INFO L226 Difference]: Without dead ends: 97 [2021-02-19 18:04:13,356 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:04:13,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-02-19 18:04:13,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 67. [2021-02-19 18:04:13,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.803030303030303) internal successors, (119), 66 states have internal predecessors, (119), 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) [2021-02-19 18:04:13,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 119 transitions. [2021-02-19 18:04:13,359 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 119 transitions. Word has length 25 [2021-02-19 18:04:13,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:04:13,359 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 119 transitions. [2021-02-19 18:04:13,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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) [2021-02-19 18:04:13,359 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 119 transitions. [2021-02-19 18:04:13,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:04:13,360 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:04:13,360 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:04:13,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-19 18:04:13,360 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:04:13,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:04:13,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1926225383, now seen corresponding path program 10 times [2021-02-19 18:04:13,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:04:13,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21297382] [2021-02-19 18:04:13,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:04:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:04:13,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:04:13,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21297382] [2021-02-19 18:04:13,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:04:13,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 18:04:13,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925312776] [2021-02-19 18:04:13,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:04:13,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:04:13,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:04:13,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:04:13,431 INFO L87 Difference]: Start difference. First operand 67 states and 119 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 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) [2021-02-19 18:04:13,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:04:13,494 INFO L93 Difference]: Finished difference Result 32 states and 46 transitions. [2021-02-19 18:04:13,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 18:04:13,495 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 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 25 [2021-02-19 18:04:13,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:04:13,496 INFO L225 Difference]: With dead ends: 32 [2021-02-19 18:04:13,496 INFO L226 Difference]: Without dead ends: 0 [2021-02-19 18:04:13,496 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:04:13,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-19 18:04:13,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-19 18:04:13,497 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) [2021-02-19 18:04:13,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-19 18:04:13,497 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2021-02-19 18:04:13,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:04:13,497 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-19 18:04:13,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 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) [2021-02-19 18:04:13,498 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-19 18:04:13,498 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-19 18:04:13,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-19 18:04:13,502 INFO L202 PluginConnector]: Adding new model ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 06:04:13 BasicIcfg [2021-02-19 18:04:13,502 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 18:04:13,503 INFO L168 Benchmark]: Toolchain (without parser) took 2297.27 ms. Allocated memory was 255.9 MB in the beginning and 373.3 MB in the end (delta: 117.4 MB). Free memory was 236.5 MB in the beginning and 227.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 127.2 MB. Max. memory is 16.0 GB. [2021-02-19 18:04:13,506 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.4 MB in the end (delta: 181.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 18:04:13,506 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.44 ms. Allocated memory is still 255.9 MB. Free memory was 235.9 MB in the beginning and 234.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 18:04:13,512 INFO L168 Benchmark]: Boogie Preprocessor took 12.55 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 233.6 MB in the end (delta: 813.8 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-02-19 18:04:13,512 INFO L168 Benchmark]: RCFGBuilder took 215.13 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 237.7 MB in the end (delta: -4.1 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.0 GB. [2021-02-19 18:04:13,513 INFO L168 Benchmark]: TraceAbstraction took 2034.17 ms. Allocated memory was 255.9 MB in the beginning and 373.3 MB in the end (delta: 117.4 MB). Free memory was 237.7 MB in the beginning and 227.3 MB in the end (delta: 10.4 MB). Peak memory consumption was 126.5 MB. Max. memory is 16.0 GB. [2021-02-19 18:04:13,517 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 0.11 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.4 MB in the end (delta: 181.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 27.44 ms. Allocated memory is still 255.9 MB. Free memory was 235.9 MB in the beginning and 234.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.55 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 233.6 MB in the end (delta: 813.8 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 215.13 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 237.7 MB in the end (delta: -4.1 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 2034.17 ms. Allocated memory was 255.9 MB in the beginning and 373.3 MB in the end (delta: 117.4 MB). Free memory was 237.7 MB in the beginning and 227.3 MB in the end (delta: 10.4 MB). Peak memory consumption was 126.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 64]: 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, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.9s, OverallIterations: 10, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 272 SDtfs, 288 SDslu, 757 SDs, 0 SdLazy, 713 SolverSat, 107 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 73 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=415occurred in iteration=1, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 717 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 250 NumberOfCodeBlocks, 250 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 240 ConstructedInterpolants, 0 QuantifiedInterpolants, 15120 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 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...