/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/misc-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:47:17,218 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:47:17,220 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:47:17,260 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 17:47:17,326 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 17:47:17,361 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:47:17,361 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:47:17,361 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:47:17,362 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:47:17,364 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:47:17,364 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:47:17,364 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:47:17,365 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:47:17,365 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:47:17,365 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:47:17,366 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:47:17,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:47:17,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:47:17,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:47:17,366 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:47:17,366 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:47:17,367 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:47:17,367 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:47:17,367 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:47:17,367 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:47:17,367 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:47:17,367 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:47:17,368 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:47:17,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:47:17,368 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:47:17,368 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:47:17,368 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:47:17,368 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:47:17,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:47:17,369 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:47:17,369 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:47:17,369 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:47:17,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:47:17,682 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:47:17,683 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:47:17,684 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:47:17,685 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:47:17,686 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-4.wvr.bpl [2021-07-09 17:47:17,686 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-4.wvr.bpl' [2021-07-09 17:47:17,728 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:47:17,730 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:47:17,732 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:47:17,732 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:47:17,732 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:47:17,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:47:17" (1/1) ... [2021-07-09 17:47:17,753 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:47:17" (1/1) ... [2021-07-09 17:47:17,759 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:47:17,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:47:17,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:47:17,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:47:17,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:47:17" (1/1) ... [2021-07-09 17:47:17,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:47:17" (1/1) ... [2021-07-09 17:47:17,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:47:17" (1/1) ... [2021-07-09 17:47:17,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:47:17" (1/1) ... [2021-07-09 17:47:17,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:47:17" (1/1) ... [2021-07-09 17:47:17,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:47:17" (1/1) ... [2021-07-09 17:47:17,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:47:17" (1/1) ... [2021-07-09 17:47:17,776 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:47:17,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:47:17,778 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:47:17,778 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:47:17,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:47:17" (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 17:47:17,849 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:47:17,850 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:47:17,850 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:47:17,850 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:47:17,850 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:47:17,850 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:47:17,851 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:47:17,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:47:17,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:47:17,851 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 17:47:17,851 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 17:47:17,851 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 17:47:17,852 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 17:47:17,985 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:47:17,985 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 17:47:17,986 INFO L202 PluginConnector]: Adding new model misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:47:17 BoogieIcfgContainer [2021-07-09 17:47:17,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:47:17,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:47:17,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:47:17,990 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:47:17,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:47:17" (1/2) ... [2021-07-09 17:47:17,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8613c6a and model type misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:47:17, skipping insertion in model container [2021-07-09 17:47:17,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:47:17" (2/2) ... [2021-07-09 17:47:17,993 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-4.wvr.bpl [2021-07-09 17:47:17,997 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:47:17,997 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:47:17,997 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:47:17,998 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:47:18,042 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-09 17:47:18,070 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-09 17:47:18,102 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:47:18,103 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:47:18,103 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:47:18,103 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:47:18,103 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:47:18,103 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:47:18,103 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:47:18,103 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:47:18,110 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 37 places, 31 transitions, 86 flow [2021-07-09 17:47:18,180 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 231 states, 230 states have (on average 2.9478260869565216) internal successors, (678), 230 states have internal predecessors, (678), 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 17:47:18,183 INFO L276 IsEmpty]: Start isEmpty. Operand has 231 states, 230 states have (on average 2.9478260869565216) internal successors, (678), 230 states have internal predecessors, (678), 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 17:47:18,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:47:18,194 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:18,194 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:18,195 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:18,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:18,199 INFO L82 PathProgramCache]: Analyzing trace with hash -155015942, now seen corresponding path program 1 times [2021-07-09 17:47:18,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:18,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352866627] [2021-07-09 17:47:18,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:18,332 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 17:47:18,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:18,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352866627] [2021-07-09 17:47:18,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352866627] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:47:18,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:47:18,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 17:47:18,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605750555] [2021-07-09 17:47:18,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:47:18,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:18,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:47:18,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:47:18,361 INFO L87 Difference]: Start difference. First operand has 231 states, 230 states have (on average 2.9478260869565216) internal successors, (678), 230 states have internal predecessors, (678), 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 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 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 17:47:18,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:18,413 INFO L93 Difference]: Finished difference Result 273 states and 758 transitions. [2021-07-09 17:47:18,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:47:18,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 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 14 [2021-07-09 17:47:18,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:18,432 INFO L225 Difference]: With dead ends: 273 [2021-07-09 17:47:18,432 INFO L226 Difference]: Without dead ends: 173 [2021-07-09 17:47:18,433 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:47:18,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-07-09 17:47:18,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-07-09 17:47:18,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.7209302325581395) internal successors, (468), 172 states have internal predecessors, (468), 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 17:47:18,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 468 transitions. [2021-07-09 17:47:18,498 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 468 transitions. Word has length 14 [2021-07-09 17:47:18,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:18,498 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 468 transitions. [2021-07-09 17:47:18,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 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 17:47:18,498 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 468 transitions. [2021-07-09 17:47:18,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:47:18,500 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:18,502 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:18,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:47:18,503 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:18,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:18,506 INFO L82 PathProgramCache]: Analyzing trace with hash 126261564, now seen corresponding path program 2 times [2021-07-09 17:47:18,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:18,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112153192] [2021-07-09 17:47:18,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:18,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:18,561 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 17:47:18,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:18,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112153192] [2021-07-09 17:47:18,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112153192] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:47:18,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:47:18,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:47:18,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848755144] [2021-07-09 17:47:18,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:47:18,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:18,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:47:18,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:47:18,566 INFO L87 Difference]: Start difference. First operand 173 states and 468 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 17:47:18,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:18,627 INFO L93 Difference]: Finished difference Result 310 states and 842 transitions. [2021-07-09 17:47:18,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:47:18,628 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 14 [2021-07-09 17:47:18,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:18,631 INFO L225 Difference]: With dead ends: 310 [2021-07-09 17:47:18,631 INFO L226 Difference]: Without dead ends: 228 [2021-07-09 17:47:18,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:47:18,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-07-09 17:47:18,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2021-07-09 17:47:18,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.748898678414097) internal successors, (624), 227 states have internal predecessors, (624), 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 17:47:18,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 624 transitions. [2021-07-09 17:47:18,657 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 624 transitions. Word has length 14 [2021-07-09 17:47:18,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:18,657 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 624 transitions. [2021-07-09 17:47:18,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 17:47:18,658 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 624 transitions. [2021-07-09 17:47:18,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:47:18,659 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:18,660 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:18,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 17:47:18,660 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:18,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:18,660 INFO L82 PathProgramCache]: Analyzing trace with hash 253936222, now seen corresponding path program 1 times [2021-07-09 17:47:18,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:18,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862914902] [2021-07-09 17:47:18,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:18,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:18,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:18,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:18,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862914902] [2021-07-09 17:47:18,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862914902] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:47:18,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:47:18,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 17:47:18,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942750897] [2021-07-09 17:47:18,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:47:18,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:18,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:47:18,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:47:18,686 INFO L87 Difference]: Start difference. First operand 228 states and 624 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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 17:47:18,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:18,698 INFO L93 Difference]: Finished difference Result 369 states and 981 transitions. [2021-07-09 17:47:18,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:47:18,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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 18 [2021-07-09 17:47:18,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:18,702 INFO L225 Difference]: With dead ends: 369 [2021-07-09 17:47:18,704 INFO L226 Difference]: Without dead ends: 369 [2021-07-09 17:47:18,705 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:47:18,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-07-09 17:47:18,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 284. [2021-07-09 17:47:18,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.7597173144876326) internal successors, (781), 283 states have internal predecessors, (781), 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 17:47:18,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 781 transitions. [2021-07-09 17:47:18,723 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 781 transitions. Word has length 18 [2021-07-09 17:47:18,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:18,723 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 781 transitions. [2021-07-09 17:47:18,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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 17:47:18,724 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 781 transitions. [2021-07-09 17:47:18,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:47:18,729 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:18,730 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:18,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 17:47:18,730 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:18,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:18,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1748425536, now seen corresponding path program 1 times [2021-07-09 17:47:18,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:18,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099648860] [2021-07-09 17:47:18,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:18,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:18,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:18,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099648860] [2021-07-09 17:47:18,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099648860] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:47:18,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:47:18,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 17:47:18,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086728385] [2021-07-09 17:47:18,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:47:18,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:18,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:47:18,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:47:18,763 INFO L87 Difference]: Start difference. First operand 284 states and 781 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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 17:47:18,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:18,777 INFO L93 Difference]: Finished difference Result 432 states and 1157 transitions. [2021-07-09 17:47:18,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:47:18,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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 18 [2021-07-09 17:47:18,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:18,780 INFO L225 Difference]: With dead ends: 432 [2021-07-09 17:47:18,780 INFO L226 Difference]: Without dead ends: 432 [2021-07-09 17:47:18,780 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 17:47:18,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-07-09 17:47:18,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 348. [2021-07-09 17:47:18,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.7636887608069163) internal successors, (959), 347 states have internal predecessors, (959), 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 17:47:18,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 959 transitions. [2021-07-09 17:47:18,792 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 959 transitions. Word has length 18 [2021-07-09 17:47:18,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:18,792 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 959 transitions. [2021-07-09 17:47:18,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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 17:47:18,792 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 959 transitions. [2021-07-09 17:47:18,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:18,793 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:18,794 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:18,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 17:47:18,794 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:18,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:18,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1245940290, now seen corresponding path program 1 times [2021-07-09 17:47:18,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:18,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626040320] [2021-07-09 17:47:18,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:18,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:18,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:18,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626040320] [2021-07-09 17:47:18,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626040320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:18,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353028915] [2021-07-09 17:47:18,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:18,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:18,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:47:18,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:19,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:19,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353028915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:19,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:19,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-09 17:47:19,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262119569] [2021-07-09 17:47:19,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:47:19,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:19,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:47:19,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:47:19,014 INFO L87 Difference]: Start difference. First operand 348 states and 959 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 17:47:19,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:19,070 INFO L93 Difference]: Finished difference Result 665 states and 1852 transitions. [2021-07-09 17:47:19,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:47:19,071 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 22 [2021-07-09 17:47:19,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:19,074 INFO L225 Difference]: With dead ends: 665 [2021-07-09 17:47:19,074 INFO L226 Difference]: Without dead ends: 509 [2021-07-09 17:47:19,074 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:47:19,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-07-09 17:47:19,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 408. [2021-07-09 17:47:19,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.7764127764127764) internal successors, (1130), 407 states have internal predecessors, (1130), 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 17:47:19,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1130 transitions. [2021-07-09 17:47:19,090 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1130 transitions. Word has length 22 [2021-07-09 17:47:19,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:19,091 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1130 transitions. [2021-07-09 17:47:19,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 17:47:19,091 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1130 transitions. [2021-07-09 17:47:19,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:19,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:19,093 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:19,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:19,301 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:19,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:19,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1294560668, now seen corresponding path program 1 times [2021-07-09 17:47:19,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:19,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412278522] [2021-07-09 17:47:19,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:19,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:19,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:19,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:19,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412278522] [2021-07-09 17:47:19,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412278522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:19,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891589329] [2021-07-09 17:47:19,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:19,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:47:19,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:19,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:19,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891589329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:19,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:19,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-09 17:47:19,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897755470] [2021-07-09 17:47:19,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:47:19,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:19,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:47:19,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:47:19,480 INFO L87 Difference]: Start difference. First operand 408 states and 1130 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 17:47:19,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:19,582 INFO L93 Difference]: Finished difference Result 873 states and 2457 transitions. [2021-07-09 17:47:19,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:47:19,584 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 22 [2021-07-09 17:47:19,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:19,588 INFO L225 Difference]: With dead ends: 873 [2021-07-09 17:47:19,588 INFO L226 Difference]: Without dead ends: 717 [2021-07-09 17:47:19,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:47:19,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-07-09 17:47:19,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 697. [2021-07-09 17:47:19,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 2.8117816091954024) internal successors, (1957), 696 states have internal predecessors, (1957), 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 17:47:19,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1957 transitions. [2021-07-09 17:47:19,606 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1957 transitions. Word has length 22 [2021-07-09 17:47:19,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:19,607 INFO L482 AbstractCegarLoop]: Abstraction has 697 states and 1957 transitions. [2021-07-09 17:47:19,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 17:47:19,607 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1957 transitions. [2021-07-09 17:47:19,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:47:19,609 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:19,609 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:19,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:19,825 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:19,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:19,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1519255610, now seen corresponding path program 2 times [2021-07-09 17:47:19,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:19,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297441981] [2021-07-09 17:47:19,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:19,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:19,845 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:47:19,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:19,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297441981] [2021-07-09 17:47:19,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297441981] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:47:19,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:47:19,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:47:19,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065115764] [2021-07-09 17:47:19,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:47:19,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:19,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:47:19,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:47:19,847 INFO L87 Difference]: Start difference. First operand 697 states and 1957 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:19,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:19,862 INFO L93 Difference]: Finished difference Result 873 states and 2302 transitions. [2021-07-09 17:47:19,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:47:19,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:47:19,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:19,867 INFO L225 Difference]: With dead ends: 873 [2021-07-09 17:47:19,867 INFO L226 Difference]: Without dead ends: 873 [2021-07-09 17:47:19,868 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:47:19,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2021-07-09 17:47:19,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 671. [2021-07-09 17:47:19,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 2.662686567164179) internal successors, (1784), 670 states have internal predecessors, (1784), 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 17:47:19,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1784 transitions. [2021-07-09 17:47:19,887 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1784 transitions. Word has length 26 [2021-07-09 17:47:19,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:19,887 INFO L482 AbstractCegarLoop]: Abstraction has 671 states and 1784 transitions. [2021-07-09 17:47:19,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:19,887 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1784 transitions. [2021-07-09 17:47:19,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:47:19,889 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:19,889 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:19,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-09 17:47:19,889 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:19,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:19,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1163376152, now seen corresponding path program 2 times [2021-07-09 17:47:19,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:19,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629886028] [2021-07-09 17:47:19,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:19,923 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:47:19,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:19,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629886028] [2021-07-09 17:47:19,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629886028] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:47:19,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:47:19,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:47:19,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636111221] [2021-07-09 17:47:19,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:47:19,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:19,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:47:19,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:47:19,925 INFO L87 Difference]: Start difference. First operand 671 states and 1784 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:19,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:19,942 INFO L93 Difference]: Finished difference Result 803 states and 1991 transitions. [2021-07-09 17:47:19,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:47:19,943 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:47:19,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:19,946 INFO L225 Difference]: With dead ends: 803 [2021-07-09 17:47:19,946 INFO L226 Difference]: Without dead ends: 803 [2021-07-09 17:47:19,947 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:47:19,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-07-09 17:47:19,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 679. [2021-07-09 17:47:19,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 678 states have (on average 2.5250737463126844) internal successors, (1712), 678 states have internal predecessors, (1712), 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 17:47:19,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1712 transitions. [2021-07-09 17:47:19,962 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1712 transitions. Word has length 26 [2021-07-09 17:47:19,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:19,962 INFO L482 AbstractCegarLoop]: Abstraction has 679 states and 1712 transitions. [2021-07-09 17:47:19,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:19,963 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1712 transitions. [2021-07-09 17:47:19,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:47:19,965 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:19,965 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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 17:47:19,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-09 17:47:19,965 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:19,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:19,966 INFO L82 PathProgramCache]: Analyzing trace with hash -2034206836, now seen corresponding path program 1 times [2021-07-09 17:47:19,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:19,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828747608] [2021-07-09 17:47:19,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:20,026 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:20,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:20,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828747608] [2021-07-09 17:47:20,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828747608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:20,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591117230] [2021-07-09 17:47:20,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:20,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:20,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:47:20,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:20,135 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:20,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591117230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:20,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:20,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 17:47:20,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632023406] [2021-07-09 17:47:20,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:47:20,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:20,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:47:20,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:47:20,138 INFO L87 Difference]: Start difference. First operand 679 states and 1712 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 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 17:47:20,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:20,199 INFO L93 Difference]: Finished difference Result 1111 states and 2808 transitions. [2021-07-09 17:47:20,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:47:20,199 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 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 30 [2021-07-09 17:47:20,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:20,204 INFO L225 Difference]: With dead ends: 1111 [2021-07-09 17:47:20,205 INFO L226 Difference]: Without dead ends: 935 [2021-07-09 17:47:20,205 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:47:20,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-07-09 17:47:20,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 478. [2021-07-09 17:47:20,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 2.542976939203354) internal successors, (1213), 477 states have internal predecessors, (1213), 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 17:47:20,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1213 transitions. [2021-07-09 17:47:20,218 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1213 transitions. Word has length 30 [2021-07-09 17:47:20,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:20,219 INFO L482 AbstractCegarLoop]: Abstraction has 478 states and 1213 transitions. [2021-07-09 17:47:20,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 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 17:47:20,219 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1213 transitions. [2021-07-09 17:47:20,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:47:20,221 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:20,221 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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 17:47:20,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:20,437 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:20,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:20,437 INFO L82 PathProgramCache]: Analyzing trace with hash 794142476, now seen corresponding path program 2 times [2021-07-09 17:47:20,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:20,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981619665] [2021-07-09 17:47:20,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:20,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:20,475 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:20,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:20,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981619665] [2021-07-09 17:47:20,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981619665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:20,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936680482] [2021-07-09 17:47:20,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:20,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:47:20,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:20,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:47:20,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:20,630 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:20,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936680482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:20,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:20,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-09 17:47:20,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264254695] [2021-07-09 17:47:20,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:47:20,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:20,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:47:20,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:47:20,632 INFO L87 Difference]: Start difference. First operand 478 states and 1213 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 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 17:47:20,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:20,697 INFO L93 Difference]: Finished difference Result 458 states and 1138 transitions. [2021-07-09 17:47:20,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:47:20,698 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 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 30 [2021-07-09 17:47:20,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:20,698 INFO L225 Difference]: With dead ends: 458 [2021-07-09 17:47:20,698 INFO L226 Difference]: Without dead ends: 0 [2021-07-09 17:47:20,699 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:47:20,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-09 17:47:20,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-09 17:47:20,699 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 17:47:20,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-09 17:47:20,699 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2021-07-09 17:47:20,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:20,699 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-09 17:47:20,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 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 17:47:20,700 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-09 17:47:20,700 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-09 17:47:20,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:20,924 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 17:47:20,926 INFO L202 PluginConnector]: Adding new model misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 05:47:20 BasicIcfg [2021-07-09 17:47:20,926 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 17:47:20,927 INFO L168 Benchmark]: Toolchain (without parser) took 3197.18 ms. Allocated memory was 176.2 MB in the beginning and 211.8 MB in the end (delta: 35.7 MB). Free memory was 156.0 MB in the beginning and 162.6 MB in the end (delta: -6.6 MB). Peak memory consumption was 29.6 MB. Max. memory is 8.0 GB. [2021-07-09 17:47:20,927 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 176.2 MB. Free memory is still 157.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 17:47:20,927 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.43 ms. Allocated memory is still 176.2 MB. Free memory was 155.9 MB in the beginning and 154.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:47:20,927 INFO L168 Benchmark]: Boogie Preprocessor took 16.00 ms. Allocated memory is still 176.2 MB. Free memory was 154.5 MB in the beginning and 153.6 MB in the end (delta: 873.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:47:20,927 INFO L168 Benchmark]: RCFGBuilder took 208.64 ms. Allocated memory is still 176.2 MB. Free memory was 153.5 MB in the beginning and 142.5 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-07-09 17:47:20,927 INFO L168 Benchmark]: TraceAbstraction took 2938.30 ms. Allocated memory was 176.2 MB in the beginning and 211.8 MB in the end (delta: 35.7 MB). Free memory was 142.0 MB in the beginning and 162.6 MB in the end (delta: -20.6 MB). Peak memory consumption was 16.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:47:20,928 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 176.2 MB. Free memory is still 157.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 27.43 ms. Allocated memory is still 176.2 MB. Free memory was 155.9 MB in the beginning and 154.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.00 ms. Allocated memory is still 176.2 MB. Free memory was 154.5 MB in the beginning and 153.6 MB in the end (delta: 873.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 208.64 ms. Allocated memory is still 176.2 MB. Free memory was 153.5 MB in the beginning and 142.5 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2938.30 ms. Allocated memory was 176.2 MB in the beginning and 211.8 MB in the end (delta: 35.7 MB). Free memory was 142.0 MB in the beginning and 162.6 MB in the end (delta: -20.6 MB). Peak memory consumption was 16.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 62]: 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 7 procedures, 48 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2822.3ms, OverallIterations: 10, TraceHistogramMax: 3, EmptinessCheckTime: 33.0ms, AutomataDifference: 551.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 76.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 282 SDtfs, 341 SDslu, 351 SDs, 0 SdLazy, 182 SolverSat, 84 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 213.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 153 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 189.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=697occurred in iteration=6, InterpolantAutomatonStates: 43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 191.4ms AutomataMinimizationTime, 10 MinimizatonAttempts, 1073 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 36.7ms SsaConstructionTime, 117.7ms SatisfiabilityAnalysisTime, 672.8ms InterpolantComputationTime, 324 NumberOfCodeBlocks, 324 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 310 ConstructedInterpolants, 0 QuantifiedInterpolants, 574 SizeOfPredicates, 4 NumberOfNonLiveVariables, 212 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 66/88 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...