/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/bakery-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 14:50:35,602 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 14:50:35,603 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 14:50:35,631 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 14:50:35,676 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-06-05 14:50:35,708 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 14:50:35,708 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 14:50:35,709 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 14:50:35,709 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 14:50:35,710 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 14:50:35,711 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 14:50:35,711 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 14:50:35,711 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 14:50:35,711 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 14:50:35,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 14:50:35,712 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 14:50:35,712 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 14:50:35,712 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 14:50:35,712 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 14:50:35,712 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 14:50:35,712 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 14:50:35,712 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 14:50:35,713 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 14:50:35,713 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 14:50:35,713 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 14:50:35,713 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 14:50:35,713 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 14:50:35,713 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 14:50:35,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 14:50:35,713 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 14:50:35,713 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 14:50:35,713 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 14:50:35,714 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 14:50:35,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 14:50:35,714 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 14:50:35,714 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 14:50:35,714 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 14:50:35,714 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 14:50:35,934 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 14:50:35,946 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 14:50:35,948 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 14:50:35,948 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 14:50:35,951 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 14:50:35,951 INFO L432 ainManager$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 [2021-06-05 14:50:35,963 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/bakery-2.wvr.bpl' [2021-06-05 14:50:35,987 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 14:50:35,988 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 14:50:35,990 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 14:50:35,990 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 14:50:35,990 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 14:50:36,000 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 05.06 02:50:35" (1/1) ... [2021-06-05 14:50:36,004 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 05.06 02:50:35" (1/1) ... [2021-06-05 14:50:36,009 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 14:50:36,010 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 14:50:36,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 14:50:36,011 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 14:50:36,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:50:35" (1/1) ... [2021-06-05 14:50:36,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:50:35" (1/1) ... [2021-06-05 14:50:36,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:50:35" (1/1) ... [2021-06-05 14:50:36,017 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:50:35" (1/1) ... [2021-06-05 14:50:36,020 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:50:35" (1/1) ... [2021-06-05 14:50:36,021 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:50:35" (1/1) ... [2021-06-05 14:50:36,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:50:35" (1/1) ... [2021-06-05 14:50:36,025 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 14:50:36,025 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 14:50:36,025 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 14:50:36,026 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 14:50:36,027 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:50:35" (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 [2021-06-05 14:50:36,087 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 14:50:36,088 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 14:50:36,088 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 14:50:36,088 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 14:50:36,088 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 14:50:36,088 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 14:50:36,088 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 14:50:36,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 14:50:36,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 14:50:36,089 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 14:50:36,275 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 14:50:36,275 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 14:50:36,276 INFO L202 PluginConnector]: Adding new model bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:50:36 BoogieIcfgContainer [2021-06-05 14:50:36,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 14:50:36,278 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 14:50:36,278 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 14:50:36,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 14:50:36,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:50:35" (1/2) ... [2021-06-05 14:50:36,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a6ddc02 and model type bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 02:50:36, skipping insertion in model container [2021-06-05 14:50:36,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:50:36" (2/2) ... [2021-06-05 14:50:36,281 INFO L111 eAbstractionObserver]: Analyzing ICFG bakery-2.wvr.bpl [2021-06-05 14:50:36,284 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 14:50:36,285 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 14:50:36,285 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 14:50:36,285 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 14:50:36,307 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 14:50:36,321 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 14:50:36,334 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 14:50:36,334 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 14:50:36,334 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 14:50:36,334 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 14:50:36,334 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 14:50:36,334 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 14:50:36,334 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 14:50:36,334 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 14:50:36,340 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 31 transitions, 78 flow [2021-06-05 14:50:36,365 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) [2021-06-05 14:50:36,367 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) [2021-06-05 14:50:36,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 14:50:36,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:36,373 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:36,374 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:36,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:36,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1085473584, now seen corresponding path program 1 times [2021-06-05 14:50:36,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:36,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052323112] [2021-06-05 14:50:36,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:36,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:36,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:36,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052323112] [2021-06-05 14:50:36,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052323112] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:50:36,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:50:36,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 14:50:36,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574436458] [2021-06-05 14:50:36,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:50:36,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:36,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:50:36,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:50:36,640 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) [2021-06-05 14:50:36,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:36,771 INFO L93 Difference]: Finished difference Result 198 states and 337 transitions. [2021-06-05 14:50:36,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:50:36,773 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 [2021-06-05 14:50:36,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:36,782 INFO L225 Difference]: With dead ends: 198 [2021-06-05 14:50:36,783 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 14:50:36,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 119.1ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:50:36,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 14:50:36,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 127. [2021-06-05 14:50:36,808 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) [2021-06-05 14:50:36,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 225 transitions. [2021-06-05 14:50:36,810 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 225 transitions. Word has length 27 [2021-06-05 14:50:36,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:36,810 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 225 transitions. [2021-06-05 14:50:36,810 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) [2021-06-05 14:50:36,810 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 225 transitions. [2021-06-05 14:50:36,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 14:50:36,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:36,811 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:36,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 14:50:36,812 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:36,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:36,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1158451146, now seen corresponding path program 2 times [2021-06-05 14:50:36,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:36,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687206461] [2021-06-05 14:50:36,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:36,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:36,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:36,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:36,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687206461] [2021-06-05 14:50:36,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687206461] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:50:36,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:50:36,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:50:36,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56928740] [2021-06-05 14:50:36,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:50:36,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:36,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:50:36,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:50:36,875 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) [2021-06-05 14:50:36,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:36,925 INFO L93 Difference]: Finished difference Result 197 states and 345 transitions. [2021-06-05 14:50:36,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:50:36,927 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 [2021-06-05 14:50:36,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:36,928 INFO L225 Difference]: With dead ends: 197 [2021-06-05 14:50:36,928 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 14:50:36,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:50:36,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 14:50:36,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 117. [2021-06-05 14:50:36,944 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) [2021-06-05 14:50:36,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 205 transitions. [2021-06-05 14:50:36,945 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 205 transitions. Word has length 27 [2021-06-05 14:50:36,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:36,945 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 205 transitions. [2021-06-05 14:50:36,945 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) [2021-06-05 14:50:36,945 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 205 transitions. [2021-06-05 14:50:36,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 14:50:36,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:36,946 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:36,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 14:50:36,946 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:36,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:36,947 INFO L82 PathProgramCache]: Analyzing trace with hash -750322600, now seen corresponding path program 3 times [2021-06-05 14:50:36,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:36,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338114371] [2021-06-05 14:50:36,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:36,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:36,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:36,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338114371] [2021-06-05 14:50:36,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338114371] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:50:36,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:50:36,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:50:36,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492418745] [2021-06-05 14:50:36,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 14:50:36,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:36,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 14:50:36,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:50:36,989 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) [2021-06-05 14:50:36,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:36,993 INFO L93 Difference]: Finished difference Result 111 states and 193 transitions. [2021-06-05 14:50:36,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 14:50:36,993 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 [2021-06-05 14:50:36,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:36,994 INFO L225 Difference]: With dead ends: 111 [2021-06-05 14:50:36,994 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 14:50:36,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:50:36,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 14:50:36,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-06-05 14:50:36,999 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) [2021-06-05 14:50:36,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 193 transitions. [2021-06-05 14:50:36,999 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 193 transitions. Word has length 27 [2021-06-05 14:50:37,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:37,000 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 193 transitions. [2021-06-05 14:50:37,000 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) [2021-06-05 14:50:37,000 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 193 transitions. [2021-06-05 14:50:37,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 14:50:37,001 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:37,001 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:37,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 14:50:37,001 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:37,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:37,002 INFO L82 PathProgramCache]: Analyzing trace with hash 431874426, now seen corresponding path program 4 times [2021-06-05 14:50:37,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:37,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675285564] [2021-06-05 14:50:37,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:37,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:37,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:37,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:37,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675285564] [2021-06-05 14:50:37,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675285564] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:50:37,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:50:37,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 14:50:37,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984955079] [2021-06-05 14:50:37,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:50:37,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:37,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:50:37,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:50:37,101 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) [2021-06-05 14:50:37,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:37,149 INFO L93 Difference]: Finished difference Result 138 states and 239 transitions. [2021-06-05 14:50:37,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:50:37,149 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 [2021-06-05 14:50:37,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:37,151 INFO L225 Difference]: With dead ends: 138 [2021-06-05 14:50:37,151 INFO L226 Difference]: Without dead ends: 134 [2021-06-05 14:50:37,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:50:37,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-05 14:50:37,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2021-06-05 14:50:37,169 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) [2021-06-05 14:50:37,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 221 transitions. [2021-06-05 14:50:37,170 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 221 transitions. Word has length 27 [2021-06-05 14:50:37,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:37,170 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 221 transitions. [2021-06-05 14:50:37,170 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) [2021-06-05 14:50:37,170 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 221 transitions. [2021-06-05 14:50:37,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 14:50:37,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:37,178 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:37,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 14:50:37,178 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:37,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:37,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1813354084, now seen corresponding path program 5 times [2021-06-05 14:50:37,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:37,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681015848] [2021-06-05 14:50:37,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:37,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:37,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:37,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681015848] [2021-06-05 14:50:37,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681015848] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:50:37,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:50:37,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 14:50:37,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66622978] [2021-06-05 14:50:37,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:50:37,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:37,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:50:37,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:50:37,269 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) [2021-06-05 14:50:37,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:37,322 INFO L93 Difference]: Finished difference Result 160 states and 266 transitions. [2021-06-05 14:50:37,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:50:37,322 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 [2021-06-05 14:50:37,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:37,323 INFO L225 Difference]: With dead ends: 160 [2021-06-05 14:50:37,323 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 14:50:37,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:50:37,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 14:50:37,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 78. [2021-06-05 14:50:37,325 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) [2021-06-05 14:50:37,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 127 transitions. [2021-06-05 14:50:37,326 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 127 transitions. Word has length 27 [2021-06-05 14:50:37,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:37,326 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 127 transitions. [2021-06-05 14:50:37,326 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) [2021-06-05 14:50:37,326 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 127 transitions. [2021-06-05 14:50:37,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 14:50:37,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:37,326 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:37,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 14:50:37,327 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:37,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:37,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1308240040, now seen corresponding path program 6 times [2021-06-05 14:50:37,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:37,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39024227] [2021-06-05 14:50:37,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:37,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:37,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:37,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39024227] [2021-06-05 14:50:37,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39024227] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:50:37,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:50:37,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 14:50:37,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043593650] [2021-06-05 14:50:37,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:50:37,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:37,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:50:37,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:50:37,397 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) [2021-06-05 14:50:37,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:37,450 INFO L93 Difference]: Finished difference Result 118 states and 189 transitions. [2021-06-05 14:50:37,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:50:37,451 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 [2021-06-05 14:50:37,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:37,452 INFO L225 Difference]: With dead ends: 118 [2021-06-05 14:50:37,452 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 14:50:37,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:50:37,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 14:50:37,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2021-06-05 14:50:37,457 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) [2021-06-05 14:50:37,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 130 transitions. [2021-06-05 14:50:37,457 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 130 transitions. Word has length 27 [2021-06-05 14:50:37,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:37,459 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 130 transitions. [2021-06-05 14:50:37,459 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) [2021-06-05 14:50:37,462 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 130 transitions. [2021-06-05 14:50:37,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 14:50:37,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:37,466 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:37,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 14:50:37,469 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:37,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:37,469 INFO L82 PathProgramCache]: Analyzing trace with hash -562145236, now seen corresponding path program 7 times [2021-06-05 14:50:37,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:37,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097746914] [2021-06-05 14:50:37,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:37,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:37,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:37,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:37,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097746914] [2021-06-05 14:50:37,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097746914] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:50:37,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:50:37,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:50:37,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362619036] [2021-06-05 14:50:37,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 14:50:37,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:37,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 14:50:37,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:50:37,492 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) [2021-06-05 14:50:37,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:37,499 INFO L93 Difference]: Finished difference Result 80 states and 125 transitions. [2021-06-05 14:50:37,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 14:50:37,500 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 [2021-06-05 14:50:37,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:37,500 INFO L225 Difference]: With dead ends: 80 [2021-06-05 14:50:37,500 INFO L226 Difference]: Without dead ends: 75 [2021-06-05 14:50:37,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:50:37,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-05 14:50:37,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-06-05 14:50:37,502 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) [2021-06-05 14:50:37,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 118 transitions. [2021-06-05 14:50:37,502 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 118 transitions. Word has length 27 [2021-06-05 14:50:37,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:37,502 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 118 transitions. [2021-06-05 14:50:37,502 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) [2021-06-05 14:50:37,502 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 118 transitions. [2021-06-05 14:50:37,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 14:50:37,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:37,503 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:37,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 14:50:37,503 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:37,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:37,503 INFO L82 PathProgramCache]: Analyzing trace with hash 968063748, now seen corresponding path program 8 times [2021-06-05 14:50:37,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:37,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660943927] [2021-06-05 14:50:37,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:37,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:37,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:37,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:37,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660943927] [2021-06-05 14:50:37,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660943927] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:50:37,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:50:37,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 14:50:37,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524985886] [2021-06-05 14:50:37,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:50:37,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:37,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:50:37,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:50:37,566 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) [2021-06-05 14:50:37,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:37,589 INFO L93 Difference]: Finished difference Result 75 states and 116 transitions. [2021-06-05 14:50:37,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:50:37,590 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 [2021-06-05 14:50:37,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:37,590 INFO L225 Difference]: With dead ends: 75 [2021-06-05 14:50:37,590 INFO L226 Difference]: Without dead ends: 71 [2021-06-05 14:50:37,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:50:37,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-06-05 14:50:37,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-06-05 14:50:37,592 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) [2021-06-05 14:50:37,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 110 transitions. [2021-06-05 14:50:37,592 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 110 transitions. Word has length 27 [2021-06-05 14:50:37,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:37,592 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 110 transitions. [2021-06-05 14:50:37,592 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) [2021-06-05 14:50:37,592 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 110 transitions. [2021-06-05 14:50:37,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 14:50:37,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:37,593 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:37,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 14:50:37,593 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:37,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:37,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1549549914, now seen corresponding path program 9 times [2021-06-05 14:50:37,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:37,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013121561] [2021-06-05 14:50:37,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:37,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:37,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:37,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:37,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013121561] [2021-06-05 14:50:37,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013121561] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:50:37,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:50:37,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 14:50:37,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165970413] [2021-06-05 14:50:37,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:50:37,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:37,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:50:37,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:50:37,634 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) [2021-06-05 14:50:37,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:37,652 INFO L93 Difference]: Finished difference Result 45 states and 70 transitions. [2021-06-05 14:50:37,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:50:37,653 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 [2021-06-05 14:50:37,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:37,653 INFO L225 Difference]: With dead ends: 45 [2021-06-05 14:50:37,653 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 14:50:37,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:50:37,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 14:50:37,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 14:50:37,654 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) [2021-06-05 14:50:37,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 14:50:37,654 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2021-06-05 14:50:37,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:37,654 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 14:50:37,654 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) [2021-06-05 14:50:37,654 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 14:50:37,654 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 14:50:37,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 14:50:37,655 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 14:50:37,657 INFO L202 PluginConnector]: Adding new model bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 02:50:37 BasicIcfg [2021-06-05 14:50:37,657 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 14:50:37,658 INFO L168 Benchmark]: Toolchain (without parser) took 1669.53 ms. Allocated memory is still 339.7 MB. Free memory was 319.3 MB in the beginning and 237.4 MB in the end (delta: 81.9 MB). Peak memory consumption was 82.9 MB. Max. memory is 16.0 GB. [2021-06-05 14:50:37,658 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 339.7 MB. Free memory is still 320.4 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 14:50:37,658 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.47 ms. Allocated memory is still 339.7 MB. Free memory was 319.2 MB in the beginning and 317.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 14:50:37,658 INFO L168 Benchmark]: Boogie Preprocessor took 14.74 ms. Allocated memory is still 339.7 MB. Free memory was 317.7 MB in the beginning and 316.8 MB in the end (delta: 900.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 14:50:37,658 INFO L168 Benchmark]: RCFGBuilder took 251.38 ms. Allocated memory is still 339.7 MB. Free memory was 316.8 MB in the beginning and 305.5 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 14:50:37,659 INFO L168 Benchmark]: TraceAbstraction took 1379.54 ms. Allocated memory is still 339.7 MB. Free memory was 305.0 MB in the beginning and 237.4 MB in the end (delta: 67.6 MB). Peak memory consumption was 68.3 MB. Max. memory is 16.0 GB. [2021-06-05 14:50:37,659 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 0.09 ms. Allocated memory is still 339.7 MB. Free memory is still 320.4 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.47 ms. Allocated memory is still 339.7 MB. Free memory was 319.2 MB in the beginning and 317.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.74 ms. Allocated memory is still 339.7 MB. Free memory was 317.7 MB in the beginning and 316.8 MB in the end (delta: 900.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 251.38 ms. Allocated memory is still 339.7 MB. Free memory was 316.8 MB in the beginning and 305.5 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1379.54 ms. Allocated memory is still 339.7 MB. Free memory was 305.0 MB in the beginning and 237.4 MB in the end (delta: 67.6 MB). Peak memory consumption was 68.3 MB. Max. memory is 16.0 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 with 1 thread instances CFG has 5 procedures, 56 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1322.4ms, OverallIterations: 9, TraceHistogramMax: 1, EmptinessCheckTime: 23.9ms, AutomataDifference: 442.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 31.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 314 SDtfs, 293 SDslu, 680 SDs, 0 SdLazy, 276 SolverSat, 41 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 163.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 355.5ms 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: 68.5ms AutomataMinimizationTime, 9 MinimizatonAttempts, 124 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 10.5ms SsaConstructionTime, 78.7ms SatisfiabilityAnalysisTime, 551.1ms 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...