/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 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:41:46,104 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:41:46,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:41:46,144 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-09 17:41:46,145 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-09 17:41:46,147 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-09 17:41:46,149 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-09 17:41:46,155 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-09 17:41:46,157 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-09 17:41:46,161 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-09 17:41:46,162 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-09 17:41:46,163 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-09 17:41:46,163 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-09 17:41:46,165 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-09 17:41:46,167 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-09 17:41:46,168 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-09 17:41:46,170 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-09 17:41:46,171 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-09 17:41:46,173 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-09 17:41:46,178 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-09 17:41:46,179 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-09 17:41:46,180 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-09 17:41:46,181 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-09 17:41:46,183 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-09 17:41:46,189 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-09 17:41:46,189 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-09 17:41:46,189 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-09 17:41:46,191 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-09 17:41:46,191 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-09 17:41:46,192 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-09 17:41:46,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-09 17:41:46,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-09 17:41:46,196 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-09 17:41:46,196 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-09 17:41:46,197 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-09 17:41:46,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-09 17:41:46,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-09 17:41:46,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-09 17:41:46,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 17:41:46,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 17:41:46,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 17:41:46,204 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 [2021-07-09 17:41:46,239 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:41:46,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:41:46,240 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:41:46,240 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:41:46,242 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:41:46,242 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:41:46,242 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:41:46,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:41:46,243 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:41:46,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:41:46,244 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:41:46,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:41:46,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:41:46,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:41:46,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:41:46,244 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:41:46,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:41:46,245 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:41:46,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:41:46,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:41:46,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:41:46,245 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:41:46,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:41:46,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:41:46,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:41:46,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:41:46,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:41:46,246 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:41:46,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:41:46,246 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:41:46,246 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:41:46,247 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:41:46,568 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:41:46,587 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:41:46,589 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:41:46,590 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:41:46,591 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:41:46,591 INFO L432 ainManager$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 [2021-07-09 17:41:46,592 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/bakery-2.wvr.bpl' [2021-07-09 17:41:46,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:41:46,621 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:41:46,622 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:41:46,622 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:41:46,622 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:41:46,633 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 09.07 05:41:46" (1/1) ... [2021-07-09 17:41:46,641 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 09.07 05:41:46" (1/1) ... [2021-07-09 17:41:46,647 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:41:46,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:41:46,649 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:41:46,650 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:41:46,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:41:46" (1/1) ... [2021-07-09 17:41:46,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:41:46" (1/1) ... [2021-07-09 17:41:46,658 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:41:46" (1/1) ... [2021-07-09 17:41:46,658 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:41:46" (1/1) ... [2021-07-09 17:41:46,662 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:41:46" (1/1) ... [2021-07-09 17:41:46,664 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:41:46" (1/1) ... [2021-07-09 17:41:46,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:41:46" (1/1) ... [2021-07-09 17:41:46,669 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:41:46,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:41:46,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:41:46,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:41:46,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:41:46" (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 [2021-07-09 17:41:46,744 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:41:46,744 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:41:46,745 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:41:46,745 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:41:46,745 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:41:46,745 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:41:46,746 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:41:46,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:41:46,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:41:46,747 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 17:41:46,878 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:41:46,878 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 17:41:46,880 INFO L202 PluginConnector]: Adding new model bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:41:46 BoogieIcfgContainer [2021-07-09 17:41:46,880 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:41:46,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:41:46,882 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:41:46,884 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:41:46,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:41:46" (1/2) ... [2021-07-09 17:41:46,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f72a03d and model type bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:41:46, skipping insertion in model container [2021-07-09 17:41:46,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:41:46" (2/2) ... [2021-07-09 17:41:46,886 INFO L111 eAbstractionObserver]: Analyzing ICFG bakery-2.wvr.bpl [2021-07-09 17:41:46,891 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:41:46,891 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:41:46,891 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:41:46,892 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:41:46,939 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-09 17:41:46,957 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 17:41:46,972 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:41:46,972 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:41:46,972 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:41:46,972 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:41:46,972 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:41:46,972 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:41:46,979 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:41:46,979 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:41:46,994 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 31 transitions, 78 flow [2021-07-09 17:41:47,036 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 148 states, 147 states have (on average 1.816326530612245) internal successors, (267), 147 states have internal predecessors, (267), 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) [2021-07-09 17:41:47,039 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 147 states have (on average 1.816326530612245) internal successors, (267), 147 states have internal predecessors, (267), 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) [2021-07-09 17:41:47,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:41:47,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:47,048 INFO L508 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] [2021-07-09 17:41:47,048 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:47,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:47,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1890905296, now seen corresponding path program 1 times [2021-07-09 17:41:47,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:47,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124307608] [2021-07-09 17:41:47,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:47,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:47,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:47,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124307608] [2021-07-09 17:41:47,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124307608] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:41:47,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:41:47,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 17:41:47,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540159062] [2021-07-09 17:41:47,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:41:47,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:47,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:41:47,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:41:47,328 INFO L87 Difference]: Start difference. First operand has 148 states, 147 states have (on average 1.816326530612245) internal successors, (267), 147 states have internal predecessors, (267), 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) [2021-07-09 17:41:47,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:47,485 INFO L93 Difference]: Finished difference Result 198 states and 337 transitions. [2021-07-09 17:41:47,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:41:47,487 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 [2021-07-09 17:41:47,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:47,500 INFO L225 Difference]: With dead ends: 198 [2021-07-09 17:41:47,500 INFO L226 Difference]: Without dead ends: 161 [2021-07-09 17:41:47,501 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 128.0ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:41:47,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-07-09 17:41:47,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 127. [2021-07-09 17:41:47,547 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) [2021-07-09 17:41:47,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 225 transitions. [2021-07-09 17:41:47,549 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 225 transitions. Word has length 27 [2021-07-09 17:41:47,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:47,550 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 225 transitions. [2021-07-09 17:41:47,550 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) [2021-07-09 17:41:47,550 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 225 transitions. [2021-07-09 17:41:47,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:41:47,551 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:47,552 INFO L508 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] [2021-07-09 17:41:47,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:41:47,552 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:47,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:47,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1158451146, now seen corresponding path program 2 times [2021-07-09 17:41:47,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:47,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049992932] [2021-07-09 17:41:47,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:47,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:47,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:47,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:47,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049992932] [2021-07-09 17:41:47,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049992932] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:41:47,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:41:47,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:41:47,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624200145] [2021-07-09 17:41:47,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:41:47,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:47,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:41:47,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:41:47,628 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) [2021-07-09 17:41:47,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:47,697 INFO L93 Difference]: Finished difference Result 197 states and 345 transitions. [2021-07-09 17:41:47,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:41:47,699 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 [2021-07-09 17:41:47,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:47,700 INFO L225 Difference]: With dead ends: 197 [2021-07-09 17:41:47,700 INFO L226 Difference]: Without dead ends: 167 [2021-07-09 17:41:47,701 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:41:47,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-07-09 17:41:47,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 117. [2021-07-09 17:41:47,708 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) [2021-07-09 17:41:47,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 205 transitions. [2021-07-09 17:41:47,709 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 205 transitions. Word has length 27 [2021-07-09 17:41:47,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:47,709 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 205 transitions. [2021-07-09 17:41:47,710 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) [2021-07-09 17:41:47,710 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 205 transitions. [2021-07-09 17:41:47,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:41:47,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:47,711 INFO L508 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] [2021-07-09 17:41:47,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 17:41:47,711 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:47,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:47,712 INFO L82 PathProgramCache]: Analyzing trace with hash -750322600, now seen corresponding path program 3 times [2021-07-09 17:41:47,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:47,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153598898] [2021-07-09 17:41:47,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:47,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:47,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:47,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153598898] [2021-07-09 17:41:47,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153598898] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:41:47,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:41:47,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:41:47,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609743743] [2021-07-09 17:41:47,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:41:47,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:47,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:41:47,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:41:47,769 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) [2021-07-09 17:41:47,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:47,772 INFO L93 Difference]: Finished difference Result 111 states and 193 transitions. [2021-07-09 17:41:47,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:41:47,773 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 [2021-07-09 17:41:47,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:47,774 INFO L225 Difference]: With dead ends: 111 [2021-07-09 17:41:47,774 INFO L226 Difference]: Without dead ends: 111 [2021-07-09 17:41:47,774 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:41:47,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-07-09 17:41:47,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-07-09 17:41:47,781 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) [2021-07-09 17:41:47,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 193 transitions. [2021-07-09 17:41:47,782 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 193 transitions. Word has length 27 [2021-07-09 17:41:47,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:47,782 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 193 transitions. [2021-07-09 17:41:47,782 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) [2021-07-09 17:41:47,782 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 193 transitions. [2021-07-09 17:41:47,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:41:47,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:47,783 INFO L508 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] [2021-07-09 17:41:47,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 17:41:47,784 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:47,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:47,784 INFO L82 PathProgramCache]: Analyzing trace with hash 431874426, now seen corresponding path program 4 times [2021-07-09 17:41:47,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:47,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303337840] [2021-07-09 17:41:47,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:47,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:47,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:47,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:47,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303337840] [2021-07-09 17:41:47,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303337840] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:41:47,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:41:47,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 17:41:47,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052476026] [2021-07-09 17:41:47,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:41:47,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:47,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:41:47,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:41:47,894 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) [2021-07-09 17:41:47,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:47,960 INFO L93 Difference]: Finished difference Result 138 states and 239 transitions. [2021-07-09 17:41:47,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:41:47,960 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 [2021-07-09 17:41:47,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:47,961 INFO L225 Difference]: With dead ends: 138 [2021-07-09 17:41:47,962 INFO L226 Difference]: Without dead ends: 134 [2021-07-09 17:41:47,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:41:47,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-07-09 17:41:47,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2021-07-09 17:41:47,996 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) [2021-07-09 17:41:47,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 221 transitions. [2021-07-09 17:41:47,997 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 221 transitions. Word has length 27 [2021-07-09 17:41:47,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:47,997 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 221 transitions. [2021-07-09 17:41:47,997 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) [2021-07-09 17:41:47,998 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 221 transitions. [2021-07-09 17:41:47,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:41:47,999 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:47,999 INFO L508 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] [2021-07-09 17:41:47,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 17:41:47,999 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:48,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:48,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1813354084, now seen corresponding path program 5 times [2021-07-09 17:41:48,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:48,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014141912] [2021-07-09 17:41:48,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:48,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:48,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:48,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014141912] [2021-07-09 17:41:48,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014141912] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:41:48,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:41:48,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 17:41:48,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535963145] [2021-07-09 17:41:48,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:41:48,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:48,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:41:48,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:41:48,088 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) [2021-07-09 17:41:48,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:48,157 INFO L93 Difference]: Finished difference Result 160 states and 266 transitions. [2021-07-09 17:41:48,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:41:48,158 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 [2021-07-09 17:41:48,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:48,158 INFO L225 Difference]: With dead ends: 160 [2021-07-09 17:41:48,158 INFO L226 Difference]: Without dead ends: 93 [2021-07-09 17:41:48,159 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 69.9ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:41:48,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-07-09 17:41:48,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 78. [2021-07-09 17:41:48,161 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) [2021-07-09 17:41:48,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 127 transitions. [2021-07-09 17:41:48,162 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 127 transitions. Word has length 27 [2021-07-09 17:41:48,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:48,162 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 127 transitions. [2021-07-09 17:41:48,162 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) [2021-07-09 17:41:48,162 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 127 transitions. [2021-07-09 17:41:48,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:41:48,163 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:48,163 INFO L508 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] [2021-07-09 17:41:48,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 17:41:48,164 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:48,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:48,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1308240040, now seen corresponding path program 6 times [2021-07-09 17:41:48,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:48,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761699128] [2021-07-09 17:41:48,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:48,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:48,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:48,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761699128] [2021-07-09 17:41:48,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761699128] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:41:48,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:41:48,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 17:41:48,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130185127] [2021-07-09 17:41:48,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:41:48,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:48,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:41:48,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:41:48,251 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) [2021-07-09 17:41:48,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:48,302 INFO L93 Difference]: Finished difference Result 118 states and 189 transitions. [2021-07-09 17:41:48,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:41:48,302 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 [2021-07-09 17:41:48,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:48,303 INFO L225 Difference]: With dead ends: 118 [2021-07-09 17:41:48,303 INFO L226 Difference]: Without dead ends: 100 [2021-07-09 17:41:48,304 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:41:48,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-07-09 17:41:48,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2021-07-09 17:41:48,306 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) [2021-07-09 17:41:48,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 130 transitions. [2021-07-09 17:41:48,306 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 130 transitions. Word has length 27 [2021-07-09 17:41:48,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:48,307 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 130 transitions. [2021-07-09 17:41:48,307 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) [2021-07-09 17:41:48,307 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 130 transitions. [2021-07-09 17:41:48,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:41:48,308 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:48,308 INFO L508 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] [2021-07-09 17:41:48,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-09 17:41:48,308 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:48,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:48,309 INFO L82 PathProgramCache]: Analyzing trace with hash -562145236, now seen corresponding path program 7 times [2021-07-09 17:41:48,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:48,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453206561] [2021-07-09 17:41:48,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:48,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:48,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:48,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453206561] [2021-07-09 17:41:48,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453206561] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:41:48,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:41:48,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:41:48,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239835315] [2021-07-09 17:41:48,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:41:48,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:48,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:41:48,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:41:48,324 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) [2021-07-09 17:41:48,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:48,328 INFO L93 Difference]: Finished difference Result 80 states and 125 transitions. [2021-07-09 17:41:48,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:41:48,328 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 [2021-07-09 17:41:48,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:48,329 INFO L225 Difference]: With dead ends: 80 [2021-07-09 17:41:48,329 INFO L226 Difference]: Without dead ends: 75 [2021-07-09 17:41:48,329 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:41:48,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-07-09 17:41:48,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-07-09 17:41:48,331 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) [2021-07-09 17:41:48,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 118 transitions. [2021-07-09 17:41:48,331 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 118 transitions. Word has length 27 [2021-07-09 17:41:48,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:48,331 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 118 transitions. [2021-07-09 17:41:48,331 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) [2021-07-09 17:41:48,331 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 118 transitions. [2021-07-09 17:41:48,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:41:48,332 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:48,332 INFO L508 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] [2021-07-09 17:41:48,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-09 17:41:48,332 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:48,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:48,333 INFO L82 PathProgramCache]: Analyzing trace with hash 968063748, now seen corresponding path program 8 times [2021-07-09 17:41:48,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:48,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243692243] [2021-07-09 17:41:48,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:48,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:48,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:48,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243692243] [2021-07-09 17:41:48,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243692243] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:41:48,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:41:48,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 17:41:48,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416207688] [2021-07-09 17:41:48,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:41:48,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:48,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:41:48,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:41:48,408 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) [2021-07-09 17:41:48,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:48,431 INFO L93 Difference]: Finished difference Result 75 states and 116 transitions. [2021-07-09 17:41:48,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:41:48,431 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 [2021-07-09 17:41:48,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:48,432 INFO L225 Difference]: With dead ends: 75 [2021-07-09 17:41:48,432 INFO L226 Difference]: Without dead ends: 71 [2021-07-09 17:41:48,433 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 30.7ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:41:48,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-07-09 17:41:48,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-07-09 17:41:48,435 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) [2021-07-09 17:41:48,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 110 transitions. [2021-07-09 17:41:48,435 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 110 transitions. Word has length 27 [2021-07-09 17:41:48,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:48,435 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 110 transitions. [2021-07-09 17:41:48,436 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) [2021-07-09 17:41:48,436 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 110 transitions. [2021-07-09 17:41:48,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:41:48,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:48,439 INFO L508 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] [2021-07-09 17:41:48,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-09 17:41:48,439 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:48,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:48,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1549549914, now seen corresponding path program 9 times [2021-07-09 17:41:48,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:48,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459877290] [2021-07-09 17:41:48,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:48,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:48,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:48,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:48,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459877290] [2021-07-09 17:41:48,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459877290] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:41:48,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:41:48,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 17:41:48,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678472299] [2021-07-09 17:41:48,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:41:48,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:48,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:41:48,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:41:48,520 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) [2021-07-09 17:41:48,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:48,546 INFO L93 Difference]: Finished difference Result 45 states and 70 transitions. [2021-07-09 17:41:48,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:41:48,547 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 [2021-07-09 17:41:48,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:48,547 INFO L225 Difference]: With dead ends: 45 [2021-07-09 17:41:48,548 INFO L226 Difference]: Without dead ends: 0 [2021-07-09 17:41:48,548 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:41:48,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-09 17:41:48,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-09 17:41:48,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:48,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-09 17:41:48,549 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2021-07-09 17:41:48,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:48,549 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-09 17:41:48,549 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) [2021-07-09 17:41:48,549 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-09 17:41:48,549 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-09 17:41:48,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-09 17:41:48,551 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 17:41:48,553 INFO L202 PluginConnector]: Adding new model bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 05:41:48 BasicIcfg [2021-07-09 17:41:48,553 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 17:41:48,554 INFO L168 Benchmark]: Toolchain (without parser) took 1933.44 ms. Allocated memory is still 168.8 MB. Free memory was 147.9 MB in the beginning and 64.9 MB in the end (delta: 83.0 MB). Peak memory consumption was 83.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:41:48,555 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 168.8 MB. Free memory is still 149.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 17:41:48,555 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.67 ms. Allocated memory is still 168.8 MB. Free memory was 147.9 MB in the beginning and 146.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:41:48,555 INFO L168 Benchmark]: Boogie Preprocessor took 20.33 ms. Allocated memory is still 168.8 MB. Free memory was 146.4 MB in the beginning and 145.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:41:48,556 INFO L168 Benchmark]: RCFGBuilder took 210.24 ms. Allocated memory is still 168.8 MB. Free memory was 145.3 MB in the beginning and 134.1 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-07-09 17:41:48,556 INFO L168 Benchmark]: TraceAbstraction took 1671.98 ms. Allocated memory is still 168.8 MB. Free memory was 133.6 MB in the beginning and 64.9 MB in the end (delta: 68.7 MB). Peak memory consumption was 68.3 MB. Max. memory is 8.0 GB. [2021-07-09 17:41:48,558 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 168.8 MB. Free memory is still 149.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 25.67 ms. Allocated memory is still 168.8 MB. Free memory was 147.9 MB in the beginning and 146.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 20.33 ms. Allocated memory is still 168.8 MB. Free memory was 146.4 MB in the beginning and 145.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 210.24 ms. Allocated memory is still 168.8 MB. Free memory was 145.3 MB in the beginning and 134.1 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1671.98 ms. Allocated memory is still 168.8 MB. Free memory was 133.6 MB in the beginning and 64.9 MB in the end (delta: 68.7 MB). Peak memory consumption was 68.3 MB. 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: 1579.9ms, OverallIterations: 9, TraceHistogramMax: 1, EmptinessCheckTime: 21.1ms, AutomataDifference: 531.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 56.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 314 SDtfs, 290 SDslu, 722 SDs, 0 SdLazy, 296 SolverSat, 44 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 193.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 420.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=148occurred 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: 98.1ms AutomataMinimizationTime, 9 MinimizatonAttempts, 124 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 20.8ms SsaConstructionTime, 118.2ms SatisfiabilityAnalysisTime, 592.3ms 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...