/usr/bin/java -Xmx8000000000 -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/bakery-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 20:24:07,069 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 20:24:07,071 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 20:24:07,113 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 20:24:07,174 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 [2021-06-12 20:24:07,219 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 20:24:07,219 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 20:24:07,219 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 20:24:07,219 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 20:24:07,222 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 20:24:07,222 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 20:24:07,222 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 20:24:07,222 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 20:24:07,223 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 20:24:07,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 20:24:07,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 20:24:07,224 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 20:24:07,224 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 20:24:07,224 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 20:24:07,224 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 20:24:07,224 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 20:24:07,224 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 20:24:07,225 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 20:24:07,225 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 20:24:07,225 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 20:24:07,225 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 20:24:07,225 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 20:24:07,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 20:24:07,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 20:24:07,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 20:24:07,226 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 20:24:07,226 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 20:24:07,226 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 20:24:07,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 20:24:07,226 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 20:24:07,226 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 20:24:07,227 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 20:24:07,531 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 20:24:07,553 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 20:24:07,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 20:24:07,556 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 20:24:07,558 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 20:24:07,558 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/bakery-2.wvr.bpl [2021-06-12 20:24:07,587 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/bakery-2.wvr.bpl' [2021-06-12 20:24:07,612 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 20:24:07,613 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 20:24:07,614 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 20:24:07,614 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 20:24:07,614 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 20:24:07,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:24:07" (1/1) ... [2021-06-12 20:24:07,633 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:24:07" (1/1) ... [2021-06-12 20:24:07,639 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 20:24:07,640 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 20:24:07,640 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 20:24:07,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 20:24:07,646 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:24:07" (1/1) ... [2021-06-12 20:24:07,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:24:07" (1/1) ... [2021-06-12 20:24:07,646 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:24:07" (1/1) ... [2021-06-12 20:24:07,647 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:24:07" (1/1) ... [2021-06-12 20:24:07,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:24:07" (1/1) ... [2021-06-12 20:24:07,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:24:07" (1/1) ... [2021-06-12 20:24:07,650 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:24:07" (1/1) ... [2021-06-12 20:24:07,651 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 20:24:07,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 20:24:07,652 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 20:24:07,652 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 20:24:07,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:24:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 20:24:07,732 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 20:24:07,732 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 20:24:07,732 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 20:24:07,733 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 20:24:07,733 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 20:24:07,733 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 20:24:07,733 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 20:24:07,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 20:24:07,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 20:24:07,735 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 20:24:07,928 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 20:24:07,928 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 20:24:07,930 INFO L202 PluginConnector]: Adding new model bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:24:07 BoogieIcfgContainer [2021-06-12 20:24:07,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 20:24:07,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 20:24:07,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 20:24:07,946 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 20:24:07,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:24:07" (1/2) ... [2021-06-12 20:24:07,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11861fec and model type bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 08:24:07, skipping insertion in model container [2021-06-12 20:24:07,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:24:07" (2/2) ... [2021-06-12 20:24:07,948 INFO L111 eAbstractionObserver]: Analyzing ICFG bakery-2.wvr.bpl [2021-06-12 20:24:07,952 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 20:24:07,952 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 20:24:07,952 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 20:24:07,953 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 20:24:07,981 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-12 20:24:07,999 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 20:24:08,032 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 20:24:08,032 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 20:24:08,032 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 20:24:08,032 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 20:24:08,033 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 20:24:08,033 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 20:24:08,033 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 20:24:08,033 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 20:24:08,041 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 31 transitions, 78 flow [2021-06-12 20:24:08,071 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 150 states, 148 states have (on average 1.8175675675675675) internal successors, (269), 149 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:08,075 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 148 states have (on average 1.8175675675675675) internal successors, (269), 149 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:08,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 20:24:08,088 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:24:08,089 INFO L472 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, 1, 1] [2021-06-12 20:24:08,089 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:24:08,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:24:08,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1139131120, now seen corresponding path program 1 times [2021-06-12 20:24:08,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:24:08,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988554690] [2021-06-12 20:24:08,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:24:08,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:24:08,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:24:08,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:24:08,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988554690] [2021-06-12 20:24:08,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988554690] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:24:08,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:24:08,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-12 20:24:08,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507324054] [2021-06-12 20:24:08,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:24:08,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:24:08,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:24:08,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:24:08,442 INFO L87 Difference]: Start difference. First operand has 150 states, 148 states have (on average 1.8175675675675675) internal successors, (269), 149 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:08,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:24:08,606 INFO L93 Difference]: Finished difference Result 198 states and 337 transitions. [2021-06-12 20:24:08,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:24:08,608 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 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 27 [2021-06-12 20:24:08,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:24:08,616 INFO L225 Difference]: With dead ends: 198 [2021-06-12 20:24:08,616 INFO L226 Difference]: Without dead ends: 161 [2021-06-12 20:24:08,617 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 175.9ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:24:08,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-12 20:24:08,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 127. [2021-06-12 20:24:08,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.7857142857142858) internal successors, (225), 126 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:08,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 225 transitions. [2021-06-12 20:24:08,652 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 225 transitions. Word has length 27 [2021-06-12 20:24:08,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:24:08,653 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 225 transitions. [2021-06-12 20:24:08,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:08,653 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 225 transitions. [2021-06-12 20:24:08,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 20:24:08,654 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:24:08,654 INFO L472 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, 1, 1] [2021-06-12 20:24:08,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 20:24:08,655 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:24:08,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:24:08,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1158451146, now seen corresponding path program 2 times [2021-06-12 20:24:08,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:24:08,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684564140] [2021-06-12 20:24:08,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:24:08,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:24:08,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:24:08,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:24:08,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684564140] [2021-06-12 20:24:08,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684564140] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:24:08,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:24:08,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:24:08,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285698186] [2021-06-12 20:24:08,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:24:08,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:24:08,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:24:08,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:24:08,745 INFO L87 Difference]: Start difference. First operand 127 states and 225 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:08,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:24:08,821 INFO L93 Difference]: Finished difference Result 197 states and 345 transitions. [2021-06-12 20:24:08,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:24:08,824 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 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 27 [2021-06-12 20:24:08,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:24:08,825 INFO L225 Difference]: With dead ends: 197 [2021-06-12 20:24:08,825 INFO L226 Difference]: Without dead ends: 167 [2021-06-12 20:24:08,826 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:24:08,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-12 20:24:08,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 117. [2021-06-12 20:24:08,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.7672413793103448) internal successors, (205), 116 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:08,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 205 transitions. [2021-06-12 20:24:08,846 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 205 transitions. Word has length 27 [2021-06-12 20:24:08,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:24:08,846 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 205 transitions. [2021-06-12 20:24:08,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:08,847 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 205 transitions. [2021-06-12 20:24:08,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 20:24:08,852 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:24:08,852 INFO L472 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, 1, 1] [2021-06-12 20:24:08,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 20:24:08,853 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:24:08,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:24:08,854 INFO L82 PathProgramCache]: Analyzing trace with hash -750322600, now seen corresponding path program 3 times [2021-06-12 20:24:08,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:24:08,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263796975] [2021-06-12 20:24:08,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:24:08,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:24:08,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:24:08,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:24:08,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263796975] [2021-06-12 20:24:08,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263796975] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:24:08,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:24:08,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:24:08,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336945435] [2021-06-12 20:24:08,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 20:24:08,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:24:08,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 20:24:08,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:24:08,895 INFO L87 Difference]: Start difference. First operand 117 states and 205 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:08,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:24:08,904 INFO L93 Difference]: Finished difference Result 111 states and 193 transitions. [2021-06-12 20:24:08,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 20:24:08,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 27 [2021-06-12 20:24:08,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:24:08,906 INFO L225 Difference]: With dead ends: 111 [2021-06-12 20:24:08,907 INFO L226 Difference]: Without dead ends: 111 [2021-06-12 20:24:08,908 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:24:08,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-12 20:24:08,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-06-12 20:24:08,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.7545454545454546) internal successors, (193), 110 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:08,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 193 transitions. [2021-06-12 20:24:08,918 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 193 transitions. Word has length 27 [2021-06-12 20:24:08,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:24:08,918 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 193 transitions. [2021-06-12 20:24:08,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:08,919 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 193 transitions. [2021-06-12 20:24:08,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 20:24:08,920 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:24:08,920 INFO L472 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, 1, 1] [2021-06-12 20:24:08,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 20:24:08,920 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:24:08,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:24:08,925 INFO L82 PathProgramCache]: Analyzing trace with hash 431874426, now seen corresponding path program 4 times [2021-06-12 20:24:08,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:24:08,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661931293] [2021-06-12 20:24:08,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:24:08,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:24:09,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:24:09,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:24:09,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661931293] [2021-06-12 20:24:09,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661931293] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:24:09,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:24:09,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-12 20:24:09,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548929327] [2021-06-12 20:24:09,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:24:09,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:24:09,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:24:09,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:24:09,033 INFO L87 Difference]: Start difference. First operand 111 states and 193 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:09,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:24:09,086 INFO L93 Difference]: Finished difference Result 138 states and 239 transitions. [2021-06-12 20:24:09,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:24:09,086 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 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 27 [2021-06-12 20:24:09,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:24:09,087 INFO L225 Difference]: With dead ends: 138 [2021-06-12 20:24:09,087 INFO L226 Difference]: Without dead ends: 134 [2021-06-12 20:24:09,088 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:24:09,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-12 20:24:09,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2021-06-12 20:24:09,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.7401574803149606) internal successors, (221), 127 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:09,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 221 transitions. [2021-06-12 20:24:09,096 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 221 transitions. Word has length 27 [2021-06-12 20:24:09,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:24:09,096 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 221 transitions. [2021-06-12 20:24:09,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:09,096 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 221 transitions. [2021-06-12 20:24:09,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 20:24:09,097 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:24:09,097 INFO L472 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, 1, 1] [2021-06-12 20:24:09,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 20:24:09,098 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:24:09,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:24:09,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1813354084, now seen corresponding path program 5 times [2021-06-12 20:24:09,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:24:09,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229294292] [2021-06-12 20:24:09,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:24:09,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:24:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:24:09,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:24:09,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229294292] [2021-06-12 20:24:09,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229294292] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:24:09,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:24:09,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-12 20:24:09,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836423180] [2021-06-12 20:24:09,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:24:09,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:24:09,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:24:09,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:24:09,160 INFO L87 Difference]: Start difference. First operand 128 states and 221 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:09,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:24:09,234 INFO L93 Difference]: Finished difference Result 160 states and 266 transitions. [2021-06-12 20:24:09,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:24:09,235 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 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 27 [2021-06-12 20:24:09,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:24:09,236 INFO L225 Difference]: With dead ends: 160 [2021-06-12 20:24:09,236 INFO L226 Difference]: Without dead ends: 93 [2021-06-12 20:24:09,236 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 65.8ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:24:09,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-12 20:24:09,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 78. [2021-06-12 20:24:09,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.6493506493506493) internal successors, (127), 77 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:09,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 127 transitions. [2021-06-12 20:24:09,240 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 127 transitions. Word has length 27 [2021-06-12 20:24:09,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:24:09,241 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 127 transitions. [2021-06-12 20:24:09,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:09,241 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 127 transitions. [2021-06-12 20:24:09,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 20:24:09,241 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:24:09,242 INFO L472 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, 1, 1] [2021-06-12 20:24:09,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 20:24:09,242 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:24:09,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:24:09,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1308240040, now seen corresponding path program 6 times [2021-06-12 20:24:09,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:24:09,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000745347] [2021-06-12 20:24:09,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:24:09,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:24:09,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:24:09,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:24:09,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000745347] [2021-06-12 20:24:09,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000745347] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:24:09,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:24:09,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-12 20:24:09,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362866312] [2021-06-12 20:24:09,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:24:09,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:24:09,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:24:09,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:24:09,342 INFO L87 Difference]: Start difference. First operand 78 states and 127 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:09,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:24:09,393 INFO L93 Difference]: Finished difference Result 118 states and 189 transitions. [2021-06-12 20:24:09,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:24:09,393 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 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 27 [2021-06-12 20:24:09,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:24:09,394 INFO L225 Difference]: With dead ends: 118 [2021-06-12 20:24:09,394 INFO L226 Difference]: Without dead ends: 100 [2021-06-12 20:24:09,395 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:24:09,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-12 20:24:09,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2021-06-12 20:24:09,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.625) internal successors, (130), 80 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:09,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 130 transitions. [2021-06-12 20:24:09,409 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 130 transitions. Word has length 27 [2021-06-12 20:24:09,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:24:09,409 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 130 transitions. [2021-06-12 20:24:09,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:09,409 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 130 transitions. [2021-06-12 20:24:09,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 20:24:09,410 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:24:09,410 INFO L472 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, 1, 1] [2021-06-12 20:24:09,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-12 20:24:09,410 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:24:09,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:24:09,411 INFO L82 PathProgramCache]: Analyzing trace with hash -562145236, now seen corresponding path program 7 times [2021-06-12 20:24:09,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:24:09,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304987305] [2021-06-12 20:24:09,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:24:09,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:24:09,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:24:09,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:24:09,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304987305] [2021-06-12 20:24:09,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304987305] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:24:09,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:24:09,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:24:09,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633320228] [2021-06-12 20:24:09,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 20:24:09,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:24:09,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 20:24:09,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:24:09,441 INFO L87 Difference]: Start difference. First operand 81 states and 130 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:09,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:24:09,444 INFO L93 Difference]: Finished difference Result 80 states and 125 transitions. [2021-06-12 20:24:09,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 20:24:09,449 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 27 [2021-06-12 20:24:09,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:24:09,449 INFO L225 Difference]: With dead ends: 80 [2021-06-12 20:24:09,449 INFO L226 Difference]: Without dead ends: 75 [2021-06-12 20:24:09,449 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:24:09,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-12 20:24:09,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-06-12 20:24:09,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.5945945945945945) internal successors, (118), 74 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:09,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 118 transitions. [2021-06-12 20:24:09,452 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 118 transitions. Word has length 27 [2021-06-12 20:24:09,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:24:09,452 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 118 transitions. [2021-06-12 20:24:09,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:09,452 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 118 transitions. [2021-06-12 20:24:09,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 20:24:09,453 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:24:09,453 INFO L472 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, 1, 1] [2021-06-12 20:24:09,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-12 20:24:09,453 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:24:09,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:24:09,453 INFO L82 PathProgramCache]: Analyzing trace with hash 968063748, now seen corresponding path program 8 times [2021-06-12 20:24:09,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:24:09,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295647980] [2021-06-12 20:24:09,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:24:09,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:24:09,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:24:09,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:24:09,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295647980] [2021-06-12 20:24:09,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295647980] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:24:09,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:24:09,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-12 20:24:09,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810542473] [2021-06-12 20:24:09,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:24:09,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:24:09,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:24:09,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:24:09,545 INFO L87 Difference]: Start difference. First operand 75 states and 118 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:09,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:24:09,578 INFO L93 Difference]: Finished difference Result 75 states and 116 transitions. [2021-06-12 20:24:09,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:24:09,578 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 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 27 [2021-06-12 20:24:09,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:24:09,579 INFO L225 Difference]: With dead ends: 75 [2021-06-12 20:24:09,580 INFO L226 Difference]: Without dead ends: 71 [2021-06-12 20:24:09,581 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:24:09,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-06-12 20:24:09,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-06-12 20:24:09,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.5714285714285714) internal successors, (110), 70 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:09,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 110 transitions. [2021-06-12 20:24:09,583 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 110 transitions. Word has length 27 [2021-06-12 20:24:09,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:24:09,584 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 110 transitions. [2021-06-12 20:24:09,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:09,587 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 110 transitions. [2021-06-12 20:24:09,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 20:24:09,589 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:24:09,589 INFO L472 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, 1, 1] [2021-06-12 20:24:09,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-12 20:24:09,590 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:24:09,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:24:09,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1549549914, now seen corresponding path program 9 times [2021-06-12 20:24:09,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:24:09,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001646018] [2021-06-12 20:24:09,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:24:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:24:09,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:24:09,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:24:09,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001646018] [2021-06-12 20:24:09,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001646018] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:24:09,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:24:09,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-12 20:24:09,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633867038] [2021-06-12 20:24:09,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:24:09,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:24:09,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:24:09,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:24:09,704 INFO L87 Difference]: Start difference. First operand 71 states and 110 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:09,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:24:09,731 INFO L93 Difference]: Finished difference Result 45 states and 70 transitions. [2021-06-12 20:24:09,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:24:09,732 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 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 27 [2021-06-12 20:24:09,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:24:09,732 INFO L225 Difference]: With dead ends: 45 [2021-06-12 20:24:09,732 INFO L226 Difference]: Without dead ends: 0 [2021-06-12 20:24:09,733 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:24:09,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-12 20:24:09,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-12 20:24:09,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:09,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-12 20:24:09,733 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2021-06-12 20:24:09,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:24:09,734 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-12 20:24:09,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:09,734 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-12 20:24:09,734 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-12 20:24:09,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-12 20:24:09,736 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 20:24:09,738 INFO L202 PluginConnector]: Adding new model bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 08:24:09 BasicIcfg [2021-06-12 20:24:09,738 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 20:24:09,739 INFO L168 Benchmark]: Toolchain (without parser) took 2126.04 ms. Allocated memory was 185.6 MB in the beginning and 223.3 MB in the end (delta: 37.7 MB). Free memory was 166.9 MB in the beginning and 191.8 MB in the end (delta: -24.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 8.0 GB. [2021-06-12 20:24:09,739 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 185.6 MB. Free memory is still 168.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 20:24:09,740 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.91 ms. Allocated memory is still 185.6 MB. Free memory was 166.9 MB in the beginning and 165.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 20:24:09,740 INFO L168 Benchmark]: Boogie Preprocessor took 10.65 ms. Allocated memory is still 185.6 MB. Free memory was 165.4 MB in the beginning and 164.5 MB in the end (delta: 921.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 20:24:09,740 INFO L168 Benchmark]: RCFGBuilder took 278.24 ms. Allocated memory is still 185.6 MB. Free memory was 164.5 MB in the beginning and 153.1 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-06-12 20:24:09,741 INFO L168 Benchmark]: TraceAbstraction took 1807.28 ms. Allocated memory was 185.6 MB in the beginning and 223.3 MB in the end (delta: 37.7 MB). Free memory was 152.6 MB in the beginning and 191.8 MB in the end (delta: -39.2 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 20:24:09,742 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 185.6 MB. Free memory is still 168.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 25.91 ms. Allocated memory is still 185.6 MB. Free memory was 166.9 MB in the beginning and 165.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 10.65 ms. Allocated memory is still 185.6 MB. Free memory was 165.4 MB in the beginning and 164.5 MB in the end (delta: 921.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 278.24 ms. Allocated memory is still 185.6 MB. Free memory was 164.5 MB in the beginning and 153.1 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1807.28 ms. Allocated memory was 185.6 MB in the beginning and 223.3 MB in the end (delta: 37.7 MB). Free memory was 152.6 MB in the beginning and 191.8 MB in the end (delta: -39.2 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 54]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 56 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1704.9ms, OverallIterations: 9, TraceHistogramMax: 1, EmptinessCheckTime: 28.4ms, AutomataDifference: 552.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 38.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 314 SDtfs, 298 SDslu, 669 SDs, 0 SdLazy, 269 SolverSat, 43 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 195.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 468.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=150occurred in iteration=0, InterpolantAutomatonStates: 56, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 86.8ms AutomataMinimizationTime, 9 MinimizatonAttempts, 124 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 29.5ms SsaConstructionTime, 98.0ms SatisfiabilityAnalysisTime, 718.0ms InterpolantComputationTime, 243 NumberOfCodeBlocks, 243 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 234 ConstructedInterpolants, 0 QuantifiedInterpolants, 1074 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...