/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/ticket-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-22 02:26:14,895 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 02:26:14,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 02:26:14,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-22 02:26:14,987 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-05-22 02:26:15,021 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 02:26:15,022 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 02:26:15,022 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 02:26:15,022 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 02:26:15,024 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 02:26:15,024 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 02:26:15,024 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 02:26:15,025 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 02:26:15,025 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 02:26:15,025 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 02:26:15,026 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 02:26:15,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 02:26:15,026 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 02:26:15,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 02:26:15,026 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 02:26:15,026 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 02:26:15,026 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 02:26:15,027 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 02:26:15,027 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 02:26:15,027 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 02:26:15,027 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 02:26:15,027 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 02:26:15,027 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 02:26:15,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:26:15,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 02:26:15,028 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 02:26:15,028 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 02:26:15,028 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 02:26:15,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 02:26:15,028 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 02:26:15,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 02:26:15,028 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 02:26:15,029 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 02:26:15,316 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 02:26:15,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 02:26:15,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 02:26:15,345 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 02:26:15,346 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 02:26:15,347 INFO L432 ainManager$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 [2021-05-22 02:26:15,347 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/ticket-3.wvr.bpl' [2021-05-22 02:26:15,383 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 02:26:15,384 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 02:26:15,385 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 02:26:15,385 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 02:26:15,386 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 02:26:15,396 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 22.05 02:26:15" (1/1) ... [2021-05-22 02:26:15,403 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 22.05 02:26:15" (1/1) ... [2021-05-22 02:26:15,411 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 02:26:15,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 02:26:15,413 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 02:26:15,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 02:26:15,419 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:26:15" (1/1) ... [2021-05-22 02:26:15,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:26:15" (1/1) ... [2021-05-22 02:26:15,420 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:26:15" (1/1) ... [2021-05-22 02:26:15,420 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:26:15" (1/1) ... [2021-05-22 02:26:15,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:26:15" (1/1) ... [2021-05-22 02:26:15,423 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:26:15" (1/1) ... [2021-05-22 02:26:15,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:26:15" (1/1) ... [2021-05-22 02:26:15,424 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 02:26:15,425 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 02:26:15,425 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 02:26:15,425 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 02:26:15,426 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:26:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:26:15,490 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-22 02:26:15,491 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-22 02:26:15,491 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-22 02:26:15,491 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-22 02:26:15,491 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-22 02:26:15,491 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-22 02:26:15,491 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-22 02:26:15,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 02:26:15,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 02:26:15,492 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-22 02:26:15,493 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-22 02:26:15,493 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-22 02:26:15,494 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-22 02:26:15,704 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 02:26:15,704 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-22 02:26:15,705 INFO L202 PluginConnector]: Adding new model ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:26:15 BoogieIcfgContainer [2021-05-22 02:26:15,705 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 02:26:15,707 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 02:26:15,707 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 02:26:15,709 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 02:26:15,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:26:15" (1/2) ... [2021-05-22 02:26:15,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24657129 and model type ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 02:26:15, skipping insertion in model container [2021-05-22 02:26:15,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:26:15" (2/2) ... [2021-05-22 02:26:15,711 INFO L111 eAbstractionObserver]: Analyzing ICFG ticket-3.wvr.bpl [2021-05-22 02:26:15,715 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 02:26:15,715 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 02:26:15,715 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 02:26:15,716 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 02:26:15,746 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-22 02:26:15,763 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 02:26:15,799 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:26:15,799 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:26:15,799 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:26:15,799 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:26:15,799 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:26:15,800 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:26:15,800 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:26:15,800 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 02:26:15,807 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 30 transitions, 84 flow [2021-05-22 02:26:15,859 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) [2021-05-22 02:26:15,863 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) [2021-05-22 02:26:15,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:26:15,876 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:15,876 INFO L521 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] [2021-05-22 02:26:15,877 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:15,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:15,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1307786581, now seen corresponding path program 1 times [2021-05-22 02:26:15,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:15,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098060841] [2021-05-22 02:26:15,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:16,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:16,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:16,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098060841] [2021-05-22 02:26:16,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098060841] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:16,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:16,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:26:16,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088661455] [2021-05-22 02:26:16,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:26:16,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:16,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:26:16,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:26:16,058 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) [2021-05-22 02:26:16,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:16,181 INFO L93 Difference]: Finished difference Result 667 states and 1586 transitions. [2021-05-22 02:26:16,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:26:16,186 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 [2021-05-22 02:26:16,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:16,206 INFO L225 Difference]: With dead ends: 667 [2021-05-22 02:26:16,206 INFO L226 Difference]: Without dead ends: 667 [2021-05-22 02:26:16,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.3ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:26:16,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-05-22 02:26:16,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 415. [2021-05-22 02:26:16,300 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) [2021-05-22 02:26:16,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1018 transitions. [2021-05-22 02:26:16,304 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1018 transitions. Word has length 25 [2021-05-22 02:26:16,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:16,310 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1018 transitions. [2021-05-22 02:26:16,311 INFO L483 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) [2021-05-22 02:26:16,311 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1018 transitions. [2021-05-22 02:26:16,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:26:16,317 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:16,318 INFO L521 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] [2021-05-22 02:26:16,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-22 02:26:16,318 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:16,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:16,319 INFO L82 PathProgramCache]: Analyzing trace with hash 528814763, now seen corresponding path program 2 times [2021-05-22 02:26:16,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:16,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642637984] [2021-05-22 02:26:16,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:16,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:16,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:16,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:16,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642637984] [2021-05-22 02:26:16,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642637984] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:16,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:16,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:26:16,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526881134] [2021-05-22 02:26:16,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:26:16,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:16,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:26:16,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:26:16,482 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) [2021-05-22 02:26:16,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:16,530 INFO L93 Difference]: Finished difference Result 571 states and 1381 transitions. [2021-05-22 02:26:16,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:26:16,530 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 [2021-05-22 02:26:16,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:16,532 INFO L225 Difference]: With dead ends: 571 [2021-05-22 02:26:16,532 INFO L226 Difference]: Without dead ends: 311 [2021-05-22 02:26:16,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:26:16,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-05-22 02:26:16,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2021-05-22 02:26:16,542 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) [2021-05-22 02:26:16,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 713 transitions. [2021-05-22 02:26:16,544 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 713 transitions. Word has length 25 [2021-05-22 02:26:16,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:16,544 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 713 transitions. [2021-05-22 02:26:16,544 INFO L483 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) [2021-05-22 02:26:16,544 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 713 transitions. [2021-05-22 02:26:16,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:26:16,545 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:16,545 INFO L521 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] [2021-05-22 02:26:16,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-22 02:26:16,546 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:16,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:16,546 INFO L82 PathProgramCache]: Analyzing trace with hash -784430363, now seen corresponding path program 3 times [2021-05-22 02:26:16,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:16,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931600215] [2021-05-22 02:26:16,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:16,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:16,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:16,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:16,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931600215] [2021-05-22 02:26:16,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931600215] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:16,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:16,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:26:16,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782992813] [2021-05-22 02:26:16,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:26:16,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:16,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:26:16,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:26:16,623 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) [2021-05-22 02:26:16,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:16,722 INFO L93 Difference]: Finished difference Result 353 states and 754 transitions. [2021-05-22 02:26:16,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:26:16,727 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 [2021-05-22 02:26:16,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:16,729 INFO L225 Difference]: With dead ends: 353 [2021-05-22 02:26:16,729 INFO L226 Difference]: Without dead ends: 333 [2021-05-22 02:26:16,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:26:16,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-05-22 02:26:16,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 243. [2021-05-22 02:26:16,740 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) [2021-05-22 02:26:16,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 525 transitions. [2021-05-22 02:26:16,741 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 525 transitions. Word has length 25 [2021-05-22 02:26:16,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:16,741 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 525 transitions. [2021-05-22 02:26:16,741 INFO L483 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) [2021-05-22 02:26:16,741 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 525 transitions. [2021-05-22 02:26:16,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:26:16,742 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:16,742 INFO L521 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] [2021-05-22 02:26:16,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-22 02:26:16,742 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:16,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:16,743 INFO L82 PathProgramCache]: Analyzing trace with hash -2100723483, now seen corresponding path program 4 times [2021-05-22 02:26:16,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:16,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257722773] [2021-05-22 02:26:16,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:16,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:16,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:16,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:16,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257722773] [2021-05-22 02:26:16,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257722773] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:16,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:16,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:26:16,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907324882] [2021-05-22 02:26:16,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:26:16,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:16,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:26:16,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:26:16,810 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) [2021-05-22 02:26:16,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:16,897 INFO L93 Difference]: Finished difference Result 345 states and 726 transitions. [2021-05-22 02:26:16,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:26:16,898 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 [2021-05-22 02:26:16,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:16,900 INFO L225 Difference]: With dead ends: 345 [2021-05-22 02:26:16,901 INFO L226 Difference]: Without dead ends: 327 [2021-05-22 02:26:16,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:26:16,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-05-22 02:26:16,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 238. [2021-05-22 02:26:16,913 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) [2021-05-22 02:26:16,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 502 transitions. [2021-05-22 02:26:16,914 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 502 transitions. Word has length 25 [2021-05-22 02:26:16,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:16,915 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 502 transitions. [2021-05-22 02:26:16,915 INFO L483 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) [2021-05-22 02:26:16,915 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 502 transitions. [2021-05-22 02:26:16,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:26:16,916 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:16,916 INFO L521 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] [2021-05-22 02:26:16,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-22 02:26:16,916 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:16,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:16,917 INFO L82 PathProgramCache]: Analyzing trace with hash 835582243, now seen corresponding path program 5 times [2021-05-22 02:26:16,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:16,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299552032] [2021-05-22 02:26:16,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:16,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:16,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:16,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:16,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299552032] [2021-05-22 02:26:16,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299552032] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:16,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:16,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:26:16,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757932648] [2021-05-22 02:26:16,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:26:16,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:16,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:26:16,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:26:16,987 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) [2021-05-22 02:26:17,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:17,087 INFO L93 Difference]: Finished difference Result 354 states and 725 transitions. [2021-05-22 02:26:17,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:26:17,088 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 [2021-05-22 02:26:17,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:17,090 INFO L225 Difference]: With dead ends: 354 [2021-05-22 02:26:17,090 INFO L226 Difference]: Without dead ends: 330 [2021-05-22 02:26:17,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:26:17,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-05-22 02:26:17,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 234. [2021-05-22 02:26:17,097 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) [2021-05-22 02:26:17,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 484 transitions. [2021-05-22 02:26:17,098 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 484 transitions. Word has length 25 [2021-05-22 02:26:17,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:17,098 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 484 transitions. [2021-05-22 02:26:17,098 INFO L483 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) [2021-05-22 02:26:17,098 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 484 transitions. [2021-05-22 02:26:17,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:26:17,099 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:17,099 INFO L521 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] [2021-05-22 02:26:17,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-22 02:26:17,100 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:17,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:17,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1673351899, now seen corresponding path program 6 times [2021-05-22 02:26:17,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:17,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528111467] [2021-05-22 02:26:17,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:17,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:17,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:17,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:17,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528111467] [2021-05-22 02:26:17,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528111467] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:17,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:17,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:26:17,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886120422] [2021-05-22 02:26:17,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:26:17,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:17,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:26:17,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:26:17,173 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) [2021-05-22 02:26:17,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:17,255 INFO L93 Difference]: Finished difference Result 322 states and 654 transitions. [2021-05-22 02:26:17,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:26:17,256 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 [2021-05-22 02:26:17,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:17,257 INFO L225 Difference]: With dead ends: 322 [2021-05-22 02:26:17,257 INFO L226 Difference]: Without dead ends: 306 [2021-05-22 02:26:17,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:26:17,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-05-22 02:26:17,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 226. [2021-05-22 02:26:17,263 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) [2021-05-22 02:26:17,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 463 transitions. [2021-05-22 02:26:17,264 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 463 transitions. Word has length 25 [2021-05-22 02:26:17,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:17,265 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 463 transitions. [2021-05-22 02:26:17,265 INFO L483 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) [2021-05-22 02:26:17,265 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 463 transitions. [2021-05-22 02:26:17,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:26:17,266 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:17,266 INFO L521 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] [2021-05-22 02:26:17,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-22 02:26:17,266 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:17,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:17,267 INFO L82 PathProgramCache]: Analyzing trace with hash -949575633, now seen corresponding path program 7 times [2021-05-22 02:26:17,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:17,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109088924] [2021-05-22 02:26:17,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:17,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:17,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:17,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:17,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109088924] [2021-05-22 02:26:17,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109088924] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:17,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:17,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:26:17,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294428040] [2021-05-22 02:26:17,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:26:17,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:17,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:26:17,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:26:17,306 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) [2021-05-22 02:26:17,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:17,401 INFO L93 Difference]: Finished difference Result 322 states and 647 transitions. [2021-05-22 02:26:17,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:26:17,402 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 [2021-05-22 02:26:17,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:17,403 INFO L225 Difference]: With dead ends: 322 [2021-05-22 02:26:17,403 INFO L226 Difference]: Without dead ends: 286 [2021-05-22 02:26:17,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:26:17,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-05-22 02:26:17,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 206. [2021-05-22 02:26:17,408 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) [2021-05-22 02:26:17,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 422 transitions. [2021-05-22 02:26:17,409 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 422 transitions. Word has length 25 [2021-05-22 02:26:17,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:17,410 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 422 transitions. [2021-05-22 02:26:17,410 INFO L483 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) [2021-05-22 02:26:17,410 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 422 transitions. [2021-05-22 02:26:17,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:26:17,410 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:17,411 INFO L521 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] [2021-05-22 02:26:17,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-22 02:26:17,411 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:17,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:17,411 INFO L82 PathProgramCache]: Analyzing trace with hash -682208179, now seen corresponding path program 8 times [2021-05-22 02:26:17,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:17,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924957226] [2021-05-22 02:26:17,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:17,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:17,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:17,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:17,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924957226] [2021-05-22 02:26:17,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924957226] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:17,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:17,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:26:17,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494042049] [2021-05-22 02:26:17,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:26:17,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:17,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:26:17,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:26:17,436 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) [2021-05-22 02:26:17,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:17,475 INFO L93 Difference]: Finished difference Result 93 states and 166 transitions. [2021-05-22 02:26:17,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:26:17,476 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 [2021-05-22 02:26:17,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:17,476 INFO L225 Difference]: With dead ends: 93 [2021-05-22 02:26:17,476 INFO L226 Difference]: Without dead ends: 69 [2021-05-22 02:26:17,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:26:17,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-22 02:26:17,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-05-22 02:26:17,480 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) [2021-05-22 02:26:17,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 123 transitions. [2021-05-22 02:26:17,481 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 123 transitions. Word has length 25 [2021-05-22 02:26:17,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:17,481 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 123 transitions. [2021-05-22 02:26:17,481 INFO L483 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) [2021-05-22 02:26:17,481 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 123 transitions. [2021-05-22 02:26:17,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:26:17,482 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:17,482 INFO L521 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] [2021-05-22 02:26:17,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-22 02:26:17,482 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:17,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:17,482 INFO L82 PathProgramCache]: Analyzing trace with hash -554651247, now seen corresponding path program 9 times [2021-05-22 02:26:17,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:17,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946766815] [2021-05-22 02:26:17,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:17,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:17,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:17,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:17,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946766815] [2021-05-22 02:26:17,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946766815] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:17,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:17,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:26:17,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822480268] [2021-05-22 02:26:17,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:26:17,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:17,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:26:17,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:26:17,526 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) [2021-05-22 02:26:17,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:17,582 INFO L93 Difference]: Finished difference Result 111 states and 204 transitions. [2021-05-22 02:26:17,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:26:17,583 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 [2021-05-22 02:26:17,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:17,584 INFO L225 Difference]: With dead ends: 111 [2021-05-22 02:26:17,584 INFO L226 Difference]: Without dead ends: 97 [2021-05-22 02:26:17,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:26:17,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-22 02:26:17,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 67. [2021-05-22 02:26:17,587 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) [2021-05-22 02:26:17,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 119 transitions. [2021-05-22 02:26:17,587 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 119 transitions. Word has length 25 [2021-05-22 02:26:17,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:17,587 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 119 transitions. [2021-05-22 02:26:17,587 INFO L483 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) [2021-05-22 02:26:17,588 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 119 transitions. [2021-05-22 02:26:17,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:26:17,601 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:17,601 INFO L521 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] [2021-05-22 02:26:17,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-22 02:26:17,603 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:17,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:17,604 INFO L82 PathProgramCache]: Analyzing trace with hash 130113345, now seen corresponding path program 10 times [2021-05-22 02:26:17,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:17,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106758769] [2021-05-22 02:26:17,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:17,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:17,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:17,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:17,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106758769] [2021-05-22 02:26:17,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106758769] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:26:17,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:26:17,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:26:17,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956801833] [2021-05-22 02:26:17,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:26:17,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:17,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:26:17,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:26:17,658 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) [2021-05-22 02:26:17,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:17,712 INFO L93 Difference]: Finished difference Result 32 states and 46 transitions. [2021-05-22 02:26:17,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:26:17,713 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 [2021-05-22 02:26:17,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:17,713 INFO L225 Difference]: With dead ends: 32 [2021-05-22 02:26:17,713 INFO L226 Difference]: Without dead ends: 0 [2021-05-22 02:26:17,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:26:17,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-22 02:26:17,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-22 02:26:17,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:17,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-22 02:26:17,714 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2021-05-22 02:26:17,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:17,714 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-22 02:26:17,714 INFO L483 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) [2021-05-22 02:26:17,714 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-22 02:26:17,714 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-22 02:26:17,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-22 02:26:17,715 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-05-22 02:26:17,717 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-22 02:26:17,717 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:26:17,717 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:26:17,717 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:26:17,717 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:26:17,718 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:26:17,718 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:26:17,718 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:26:17,718 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-05-22 02:26:17,719 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 30 transitions, 84 flow [2021-05-22 02:26:17,726 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) [2021-05-22 02:26:17,727 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) [2021-05-22 02:26:17,727 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-22 02:26:17,728 INFO L315 ceAbstractionStarter]: Result for error location InUseError was SAFE (2/2) [2021-05-22 02:26:17,728 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-22 02:26:17,730 INFO L202 PluginConnector]: Adding new model ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.05 02:26:17 BasicIcfg [2021-05-22 02:26:17,730 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-22 02:26:17,731 INFO L168 Benchmark]: Toolchain (without parser) took 2346.94 ms. Allocated memory is still 358.6 MB. Free memory was 338.3 MB in the beginning and 320.8 MB in the end (delta: 17.6 MB). Peak memory consumption was 20.4 MB. Max. memory is 16.0 GB. [2021-05-22 02:26:17,731 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 358.6 MB. Free memory was 339.4 MB in the beginning and 339.4 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:26:17,731 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.25 ms. Allocated memory is still 358.6 MB. Free memory was 338.3 MB in the beginning and 336.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-22 02:26:17,731 INFO L168 Benchmark]: Boogie Preprocessor took 11.95 ms. Allocated memory is still 358.6 MB. Free memory was 336.8 MB in the beginning and 335.9 MB in the end (delta: 868.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:26:17,732 INFO L168 Benchmark]: RCFGBuilder took 280.50 ms. Allocated memory is still 358.6 MB. Free memory was 335.9 MB in the beginning and 323.4 MB in the end (delta: 12.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-05-22 02:26:17,732 INFO L168 Benchmark]: TraceAbstraction took 2023.35 ms. Allocated memory is still 358.6 MB. Free memory was 322.9 MB in the beginning and 320.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 3.6 MB. Max. memory is 16.0 GB. [2021-05-22 02:26:17,733 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 358.6 MB. Free memory was 339.4 MB in the beginning and 339.4 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.25 ms. Allocated memory is still 358.6 MB. Free memory was 338.3 MB in the beginning and 336.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.95 ms. Allocated memory is still 358.6 MB. Free memory was 336.8 MB in the beginning and 335.9 MB in the end (delta: 868.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 280.50 ms. Allocated memory is still 358.6 MB. Free memory was 335.9 MB in the beginning and 323.4 MB in the end (delta: 12.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 2023.35 ms. Allocated memory is still 358.6 MB. Free memory was 322.9 MB in the beginning and 320.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 3.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 65]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 53 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1938.2ms, OverallIterations: 10, TraceHistogramMax: 1, EmptinessCheckTime: 40.9ms, AutomataDifference: 860.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 59.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 272 SDtfs, 287 SDslu, 757 SDs, 0 SdLazy, 713 SolverSat, 107 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 442.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 73 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 321.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=415occurred in iteration=1, InterpolantAutomatonStates: 64, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 144.3ms AutomataMinimizationTime, 10 MinimizatonAttempts, 717 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 24.9ms SsaConstructionTime, 138.5ms SatisfiabilityAnalysisTime, 493.5ms InterpolantComputationTime, 250 NumberOfCodeBlocks, 250 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 240 ConstructedInterpolants, 0 QuantifiedInterpolants, 638 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 - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 7 procedures, 53 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.3ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 1.5ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=350occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...