/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.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/context1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 07:12:48,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 07:12:48,313 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 07:12:48,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 07:12:48,396 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 07:12:48,433 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 07:12:48,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 07:12:48,433 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 07:12:48,434 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 07:12:48,436 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 07:12:48,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 07:12:48,436 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 07:12:48,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 07:12:48,436 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 07:12:48,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 07:12:48,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 07:12:48,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 07:12:48,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 07:12:48,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 07:12:48,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 07:12:48,438 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 07:12:48,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 07:12:48,438 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 07:12:48,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 07:12:48,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 07:12:48,438 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 07:12:48,439 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 07:12:48,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 07:12:48,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 07:12:48,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 07:12:48,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 07:12:48,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 07:12:48,439 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 07:12:48,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 07:12:48,439 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 07:12:48,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 07:12:48,440 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 07:12:48,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 07:12:48,747 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 07:12:48,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 07:12:48,751 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 07:12:48,752 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 07:12:48,753 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/context1.wvr.bpl [2021-06-05 07:12:48,904 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/context1.wvr.bpl' [2021-06-05 07:12:48,929 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 07:12:48,930 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 07:12:48,932 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 07:12:48,932 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 07:12:48,932 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 07:12:48,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:12:48" (1/1) ... [2021-06-05 07:12:48,948 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:12:48" (1/1) ... [2021-06-05 07:12:48,955 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 07:12:48,956 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 07:12:48,956 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 07:12:48,956 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 07:12:48,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:12:48" (1/1) ... [2021-06-05 07:12:48,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:12:48" (1/1) ... [2021-06-05 07:12:48,962 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:12:48" (1/1) ... [2021-06-05 07:12:48,962 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:12:48" (1/1) ... [2021-06-05 07:12:48,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:12:48" (1/1) ... [2021-06-05 07:12:48,966 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:12:48" (1/1) ... [2021-06-05 07:12:48,966 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:12:48" (1/1) ... [2021-06-05 07:12:48,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 07:12:48,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 07:12:48,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 07:12:48,969 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 07:12:48,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:12:48" (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 07:12:49,039 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 07:12:49,040 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 07:12:49,040 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 07:12:49,041 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 07:12:49,041 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 07:12:49,042 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 07:12:49,043 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 07:12:49,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 07:12:49,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 07:12:49,044 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 07:12:49,208 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 07:12:49,208 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 07:12:49,209 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 07:12:49,209 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 07:12:49,210 INFO L202 PluginConnector]: Adding new model context1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 07:12:49 BoogieIcfgContainer [2021-06-05 07:12:49,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 07:12:49,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 07:12:49,212 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 07:12:49,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 07:12:49,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:12:48" (1/2) ... [2021-06-05 07:12:49,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41663724 and model type context1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 07:12:49, skipping insertion in model container [2021-06-05 07:12:49,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 07:12:49" (2/2) ... [2021-06-05 07:12:49,216 INFO L111 eAbstractionObserver]: Analyzing ICFG context1.wvr.bpl [2021-06-05 07:12:49,221 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 07:12:49,221 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 07:12:49,221 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 07:12:49,222 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 07:12:49,259 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 07:12:49,275 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 07:12:49,291 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 07:12:49,291 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 07:12:49,291 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 07:12:49,291 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 07:12:49,291 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 07:12:49,291 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 07:12:49,291 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 07:12:49,292 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 07:12:49,298 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-06-05 07:12:49,323 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 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 07:12:49,325 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 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 07:12:49,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-05 07:12:49,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:49,351 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:49,351 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:49,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:49,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1225879624, now seen corresponding path program 1 times [2021-06-05 07:12:49,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:49,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714150044] [2021-06-05 07:12:49,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:49,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:49,470 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 07:12:49,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:49,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714150044] [2021-06-05 07:12:49,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714150044] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:12:49,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:12:49,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 07:12:49,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030250630] [2021-06-05 07:12:49,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 07:12:49,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:49,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 07:12:49,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 07:12:49,488 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 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 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 07:12:49,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:49,504 INFO L93 Difference]: Finished difference Result 20 states and 34 transitions. [2021-06-05 07:12:49,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 07:12:49,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2021-06-05 07:12:49,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:49,531 INFO L225 Difference]: With dead ends: 20 [2021-06-05 07:12:49,531 INFO L226 Difference]: Without dead ends: 16 [2021-06-05 07:12:49,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 07:12:49,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-06-05 07:12:49,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-06-05 07:12:49,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 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 07:12:49,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 27 transitions. [2021-06-05 07:12:49,557 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 27 transitions. Word has length 9 [2021-06-05 07:12:49,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:49,557 INFO L482 AbstractCegarLoop]: Abstraction has 16 states and 27 transitions. [2021-06-05 07:12:49,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 07:12:49,557 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 27 transitions. [2021-06-05 07:12:49,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 07:12:49,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:49,558 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:49,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 07:12:49,558 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:49,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:49,561 INFO L82 PathProgramCache]: Analyzing trace with hash 653163243, now seen corresponding path program 1 times [2021-06-05 07:12:49,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:49,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134671679] [2021-06-05 07:12:49,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:49,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:49,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:49,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134671679] [2021-06-05 07:12:49,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134671679] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:12:49,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:12:49,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 07:12:49,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46784426] [2021-06-05 07:12:49,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 07:12:49,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:49,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 07:12:49,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 07:12:49,591 INFO L87 Difference]: Start difference. First operand 16 states and 27 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 07:12:49,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:49,597 INFO L93 Difference]: Finished difference Result 21 states and 34 transitions. [2021-06-05 07:12:49,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 07:12:49,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 10 [2021-06-05 07:12:49,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:49,598 INFO L225 Difference]: With dead ends: 21 [2021-06-05 07:12:49,598 INFO L226 Difference]: Without dead ends: 18 [2021-06-05 07:12:49,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 07:12:49,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-06-05 07:12:49,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-06-05 07:12:49,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2021-06-05 07:12:49,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 30 transitions. [2021-06-05 07:12:49,602 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 30 transitions. Word has length 10 [2021-06-05 07:12:49,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:49,602 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 30 transitions. [2021-06-05 07:12:49,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 07:12:49,603 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 30 transitions. [2021-06-05 07:12:49,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 07:12:49,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:49,603 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:49,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 07:12:49,603 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:49,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:49,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1382019562, now seen corresponding path program 1 times [2021-06-05 07:12:49,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:49,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041276405] [2021-06-05 07:12:49,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:49,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:49,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:49,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:49,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041276405] [2021-06-05 07:12:49,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041276405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:49,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318159945] [2021-06-05 07:12:49,679 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 [2021-06-05 07:12:49,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:49,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:12:49,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:49,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:12:49,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:12:49,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:12:49,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:12:49,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 07:12:49,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:49,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318159945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:49,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:49,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 07:12:49,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860866347] [2021-06-05 07:12:49,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 07:12:49,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:49,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 07:12:49,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:12:49,813 INFO L87 Difference]: Start difference. First operand 18 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 07:12:49,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:49,842 INFO L93 Difference]: Finished difference Result 25 states and 43 transitions. [2021-06-05 07:12:49,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 07:12:49,843 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 11 [2021-06-05 07:12:49,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:49,844 INFO L225 Difference]: With dead ends: 25 [2021-06-05 07:12:49,844 INFO L226 Difference]: Without dead ends: 21 [2021-06-05 07:12:49,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:12:49,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-06-05 07:12:49,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-06-05 07:12:49,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 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 07:12:49,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 36 transitions. [2021-06-05 07:12:49,881 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 36 transitions. Word has length 11 [2021-06-05 07:12:49,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:49,881 INFO L482 AbstractCegarLoop]: Abstraction has 21 states and 36 transitions. [2021-06-05 07:12:49,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 07:12:49,881 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 36 transitions. [2021-06-05 07:12:49,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 07:12:49,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:49,882 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:50,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 07:12:50,095 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:50,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:50,096 INFO L82 PathProgramCache]: Analyzing trace with hash 107792461, now seen corresponding path program 2 times [2021-06-05 07:12:50,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:50,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701984941] [2021-06-05 07:12:50,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:50,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:50,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:50,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701984941] [2021-06-05 07:12:50,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701984941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:50,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251275180] [2021-06-05 07:12:50,128 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 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 [2021-06-05 07:12:50,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:12:50,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:50,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 07:12:50,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:50,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251275180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:50,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:50,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 07:12:50,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010788900] [2021-06-05 07:12:50,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 07:12:50,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:50,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 07:12:50,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 07:12:50,231 INFO L87 Difference]: Start difference. First operand 21 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 07:12:50,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:50,241 INFO L93 Difference]: Finished difference Result 50 states and 82 transitions. [2021-06-05 07:12:50,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 07:12:50,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12 [2021-06-05 07:12:50,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:50,244 INFO L225 Difference]: With dead ends: 50 [2021-06-05 07:12:50,244 INFO L226 Difference]: Without dead ends: 45 [2021-06-05 07:12:50,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 07:12:50,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-06-05 07:12:50,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2021-06-05 07:12:50,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 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 07:12:50,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2021-06-05 07:12:50,249 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2021-06-05 07:12:50,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:50,250 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2021-06-05 07:12:50,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 07:12:50,250 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2021-06-05 07:12:50,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 07:12:50,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:50,251 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:50,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:50,473 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:50,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:50,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1492763464, now seen corresponding path program 3 times [2021-06-05 07:12:50,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:50,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158754372] [2021-06-05 07:12:50,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:50,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:50,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:50,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158754372] [2021-06-05 07:12:50,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158754372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:50,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325483684] [2021-06-05 07:12:50,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-06-05 07:12:50,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:12:50,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:50,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:12:50,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:50,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:12:50,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:12:50,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:12:50,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:12:50,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 07:12:50,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:50,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325483684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:50,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:50,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 07:12:50,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565125607] [2021-06-05 07:12:50,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 07:12:50,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:50,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 07:12:50,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:12:50,639 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 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 07:12:50,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:50,694 INFO L93 Difference]: Finished difference Result 65 states and 115 transitions. [2021-06-05 07:12:50,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 07:12:50,695 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 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 13 [2021-06-05 07:12:50,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:50,696 INFO L225 Difference]: With dead ends: 65 [2021-06-05 07:12:50,696 INFO L226 Difference]: Without dead ends: 39 [2021-06-05 07:12:50,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:12:50,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-05 07:12:50,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2021-06-05 07:12:50,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 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 07:12:50,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2021-06-05 07:12:50,700 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 13 [2021-06-05 07:12:50,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:50,701 INFO L482 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2021-06-05 07:12:50,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 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 07:12:50,701 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2021-06-05 07:12:50,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 07:12:50,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:50,702 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:50,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:50,923 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:50,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:50,924 INFO L82 PathProgramCache]: Analyzing trace with hash 969698795, now seen corresponding path program 4 times [2021-06-05 07:12:50,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:50,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222800568] [2021-06-05 07:12:50,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:50,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:50,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:50,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:50,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222800568] [2021-06-05 07:12:50,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222800568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:50,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482393917] [2021-06-05 07:12:50,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-06-05 07:12:51,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:12:51,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:51,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 07:12:51,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:51,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:51,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482393917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:51,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:51,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 07:12:51,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91155800] [2021-06-05 07:12:51,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 07:12:51,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:51,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 07:12:51,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:12:51,068 INFO L87 Difference]: Start difference. First operand 26 states and 46 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 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) [2021-06-05 07:12:51,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:51,079 INFO L93 Difference]: Finished difference Result 73 states and 125 transitions. [2021-06-05 07:12:51,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 07:12:51,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 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 [2021-06-05 07:12:51,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:51,081 INFO L225 Difference]: With dead ends: 73 [2021-06-05 07:12:51,081 INFO L226 Difference]: Without dead ends: 66 [2021-06-05 07:12:51,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:12:51,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-06-05 07:12:51,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2021-06-05 07:12:51,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 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 07:12:51,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 95 transitions. [2021-06-05 07:12:51,088 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 95 transitions. Word has length 14 [2021-06-05 07:12:51,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:51,088 INFO L482 AbstractCegarLoop]: Abstraction has 48 states and 95 transitions. [2021-06-05 07:12:51,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 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) [2021-06-05 07:12:51,088 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 95 transitions. [2021-06-05 07:12:51,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 07:12:51,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:51,089 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:51,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:51,312 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:51,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:51,313 INFO L82 PathProgramCache]: Analyzing trace with hash 433746838, now seen corresponding path program 5 times [2021-06-05 07:12:51,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:51,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468032786] [2021-06-05 07:12:51,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:51,407 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:51,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:51,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468032786] [2021-06-05 07:12:51,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468032786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:51,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756742525] [2021-06-05 07:12:51,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:51,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:12:51,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:51,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 07:12:51,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:59,730 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-06-05 07:12:59,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 10 [2021-06-05 07:12:59,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:12:59,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:12:59,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:12:59,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:3 [2021-06-05 07:12:59,748 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:59,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756742525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:59,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:59,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 07:12:59,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729840101] [2021-06-05 07:12:59,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:12:59,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:59,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:12:59,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=167, Unknown=4, NotChecked=0, Total=210 [2021-06-05 07:12:59,750 INFO L87 Difference]: Start difference. First operand 48 states and 95 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 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 07:13:04,257 WARN L205 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 33 [2021-06-05 07:13:06,319 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 25 [2021-06-05 07:13:12,418 WARN L205 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 31 [2021-06-05 07:13:18,479 WARN L205 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 23 [2021-06-05 07:13:18,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:18,515 INFO L93 Difference]: Finished difference Result 229 states and 428 transitions. [2021-06-05 07:13:18,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:13:18,515 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 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 15 [2021-06-05 07:13:18,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:18,517 INFO L225 Difference]: With dead ends: 229 [2021-06-05 07:13:18,517 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 07:13:18,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 26747.2ms TimeCoverageRelationStatistics Valid=229, Invalid=820, Unknown=7, NotChecked=0, Total=1056 [2021-06-05 07:13:18,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 07:13:18,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 56. [2021-06-05 07:13:18,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 55 states have internal predecessors, (113), 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 07:13:18,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 113 transitions. [2021-06-05 07:13:18,525 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 113 transitions. Word has length 15 [2021-06-05 07:13:18,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:18,525 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 113 transitions. [2021-06-05 07:13:18,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 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 07:13:18,525 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 113 transitions. [2021-06-05 07:13:18,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 07:13:18,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:18,526 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:13:18,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-05 07:13:18,733 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:18,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:18,734 INFO L82 PathProgramCache]: Analyzing trace with hash 908220856, now seen corresponding path program 6 times [2021-06-05 07:13:18,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:18,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553088656] [2021-06-05 07:13:18,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:18,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:18,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553088656] [2021-06-05 07:13:18,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553088656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:18,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716863366] [2021-06-05 07:13:18,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:18,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:13:18,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:18,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:13:18,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:18,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:13:18,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:13:18,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:13:18,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:13:18,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 07:13:18,974 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:18,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716863366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:18,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:18,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 07:13:18,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488265253] [2021-06-05 07:13:18,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:13:18,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:18,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:13:18,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:13:18,980 INFO L87 Difference]: Start difference. First operand 56 states and 113 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 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 07:13:19,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:19,145 INFO L93 Difference]: Finished difference Result 121 states and 226 transitions. [2021-06-05 07:13:19,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 07:13:19,146 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 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 17 [2021-06-05 07:13:19,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:19,146 INFO L225 Difference]: With dead ends: 121 [2021-06-05 07:13:19,146 INFO L226 Difference]: Without dead ends: 77 [2021-06-05 07:13:19,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 194.4ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:13:19,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-06-05 07:13:19,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 36. [2021-06-05 07:13:19,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 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 07:13:19,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 66 transitions. [2021-06-05 07:13:19,151 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 66 transitions. Word has length 17 [2021-06-05 07:13:19,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:19,151 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 66 transitions. [2021-06-05 07:13:19,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 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 07:13:19,151 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 66 transitions. [2021-06-05 07:13:19,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 07:13:19,152 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:19,152 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:13:19,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:19,365 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:19,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:19,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1909198613, now seen corresponding path program 7 times [2021-06-05 07:13:19,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:19,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676355100] [2021-06-05 07:13:19,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:19,422 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:19,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:19,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676355100] [2021-06-05 07:13:19,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676355100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:19,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623728662] [2021-06-05 07:13:19,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:19,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:19,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:13:19,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:19,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623728662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:19,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:19,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 07:13:19,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424731016] [2021-06-05 07:13:19,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 07:13:19,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:19,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 07:13:19,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:13:19,498 INFO L87 Difference]: Start difference. First operand 36 states and 66 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 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) [2021-06-05 07:13:19,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:19,514 INFO L93 Difference]: Finished difference Result 128 states and 229 transitions. [2021-06-05 07:13:19,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 07:13:19,515 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 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 [2021-06-05 07:13:19,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:19,515 INFO L225 Difference]: With dead ends: 128 [2021-06-05 07:13:19,515 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 07:13:19,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:13:19,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 07:13:19,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 87. [2021-06-05 07:13:19,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.0813953488372094) internal successors, (179), 86 states have internal predecessors, (179), 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 07:13:19,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 179 transitions. [2021-06-05 07:13:19,534 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 179 transitions. Word has length 18 [2021-06-05 07:13:19,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:19,534 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 179 transitions. [2021-06-05 07:13:19,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 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) [2021-06-05 07:13:19,534 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 179 transitions. [2021-06-05 07:13:19,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 07:13:19,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:19,535 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:13:19,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:19,736 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:19,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:19,736 INFO L82 PathProgramCache]: Analyzing trace with hash 119613718, now seen corresponding path program 8 times [2021-06-05 07:13:19,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:19,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522869468] [2021-06-05 07:13:19,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:19,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:19,859 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:19,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:19,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522869468] [2021-06-05 07:13:19,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522869468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:19,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681455080] [2021-06-05 07:13:19,860 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:19,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:13:19,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:19,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:13:19,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:19,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:13:19,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:13:19,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:13:19,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:13:19,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 07:13:19,957 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:19,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681455080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:19,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:19,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 07:13:19,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197065642] [2021-06-05 07:13:19,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:13:19,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:19,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:13:19,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:13:19,959 INFO L87 Difference]: Start difference. First operand 87 states and 179 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 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 07:13:20,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:20,162 INFO L93 Difference]: Finished difference Result 179 states and 337 transitions. [2021-06-05 07:13:20,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 07:13:20,163 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 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 19 [2021-06-05 07:13:20,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:20,164 INFO L225 Difference]: With dead ends: 179 [2021-06-05 07:13:20,164 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 07:13:20,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 224.9ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:13:20,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 07:13:20,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 41. [2021-06-05 07:13:20,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 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 07:13:20,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2021-06-05 07:13:20,167 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 19 [2021-06-05 07:13:20,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:20,167 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2021-06-05 07:13:20,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 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 07:13:20,167 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2021-06-05 07:13:20,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 07:13:20,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:20,168 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:13:20,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 07:13:20,381 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:20,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:20,381 INFO L82 PathProgramCache]: Analyzing trace with hash -586216115, now seen corresponding path program 9 times [2021-06-05 07:13:20,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:20,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110982780] [2021-06-05 07:13:20,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:20,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:20,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:20,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110982780] [2021-06-05 07:13:20,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110982780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:20,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954180582] [2021-06-05 07:13:20,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:20,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:13:20,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:20,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:13:20,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:20,538 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:20,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954180582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:20,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:20,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 07:13:20,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209005889] [2021-06-05 07:13:20,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:13:20,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:20,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:13:20,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:13:20,540 INFO L87 Difference]: Start difference. First operand 41 states and 76 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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 07:13:20,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:20,561 INFO L93 Difference]: Finished difference Result 160 states and 290 transitions. [2021-06-05 07:13:20,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:13:20,562 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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 20 [2021-06-05 07:13:20,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:20,564 INFO L225 Difference]: With dead ends: 160 [2021-06-05 07:13:20,564 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 07:13:20,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:13:20,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 07:13:20,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 111. [2021-06-05 07:13:20,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.090909090909091) internal successors, (230), 110 states have internal predecessors, (230), 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 07:13:20,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 230 transitions. [2021-06-05 07:13:20,572 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 230 transitions. Word has length 20 [2021-06-05 07:13:20,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:20,572 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 230 transitions. [2021-06-05 07:13:20,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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 07:13:20,573 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 230 transitions. [2021-06-05 07:13:20,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 07:13:20,575 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:20,575 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:13:20,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:20,789 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:20,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:20,789 INFO L82 PathProgramCache]: Analyzing trace with hash -812718408, now seen corresponding path program 10 times [2021-06-05 07:13:20,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:20,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84932450] [2021-06-05 07:13:20,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:20,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:20,960 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:20,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:20,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84932450] [2021-06-05 07:13:20,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84932450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:20,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810831562] [2021-06-05 07:13:20,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:20,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:13:20,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:20,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:13:20,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:21,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:13:21,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:13:21,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:13:21,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:13:21,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 07:13:21,058 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:21,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810831562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:21,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:21,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 07:13:21,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86185247] [2021-06-05 07:13:21,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:13:21,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:21,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:13:21,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:13:21,060 INFO L87 Difference]: Start difference. First operand 111 states and 230 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 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 07:13:21,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:21,343 INFO L93 Difference]: Finished difference Result 229 states and 435 transitions. [2021-06-05 07:13:21,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 07:13:21,343 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 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 21 [2021-06-05 07:13:21,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:21,344 INFO L225 Difference]: With dead ends: 229 [2021-06-05 07:13:21,344 INFO L226 Difference]: Without dead ends: 135 [2021-06-05 07:13:21,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 297.3ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:13:21,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-05 07:13:21,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 46. [2021-06-05 07:13:21,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 45 states have internal predecessors, (86), 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 07:13:21,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 86 transitions. [2021-06-05 07:13:21,348 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 86 transitions. Word has length 21 [2021-06-05 07:13:21,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:21,348 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 86 transitions. [2021-06-05 07:13:21,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 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 07:13:21,348 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 86 transitions. [2021-06-05 07:13:21,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 07:13:21,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:21,349 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:13:21,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:21,565 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:21,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:21,565 INFO L82 PathProgramCache]: Analyzing trace with hash 576259051, now seen corresponding path program 11 times [2021-06-05 07:13:21,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:21,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430916923] [2021-06-05 07:13:21,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:21,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:21,637 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:21,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:21,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430916923] [2021-06-05 07:13:21,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430916923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:21,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040386753] [2021-06-05 07:13:21,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:21,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 07:13:21,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:21,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 07:13:21,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:21,730 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:21,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040386753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:21,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:21,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 07:13:21,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845878712] [2021-06-05 07:13:21,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:13:21,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:21,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:13:21,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:13:21,731 INFO L87 Difference]: Start difference. First operand 46 states and 86 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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) [2021-06-05 07:13:21,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:21,751 INFO L93 Difference]: Finished difference Result 195 states and 357 transitions. [2021-06-05 07:13:21,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 07:13:21,752 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 [2021-06-05 07:13:21,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:21,753 INFO L225 Difference]: With dead ends: 195 [2021-06-05 07:13:21,754 INFO L226 Difference]: Without dead ends: 180 [2021-06-05 07:13:21,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:13:21,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-06-05 07:13:21,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 138. [2021-06-05 07:13:21,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.0948905109489053) internal successors, (287), 137 states have internal predecessors, (287), 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 07:13:21,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 287 transitions. [2021-06-05 07:13:21,764 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 287 transitions. Word has length 22 [2021-06-05 07:13:21,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:21,764 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 287 transitions. [2021-06-05 07:13:21,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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) [2021-06-05 07:13:21,764 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 287 transitions. [2021-06-05 07:13:21,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 07:13:21,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:21,766 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:13:21,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 07:13:21,988 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:21,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:21,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1950887574, now seen corresponding path program 12 times [2021-06-05 07:13:21,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:21,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703626083] [2021-06-05 07:13:21,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:21,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:22,168 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:22,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:22,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703626083] [2021-06-05 07:13:22,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703626083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:22,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669410569] [2021-06-05 07:13:22,169 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:22,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:13:22,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:22,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 07:13:22,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:22,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:13:22,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:13:22,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:13:22,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:13:22,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 07:13:22,265 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:22,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669410569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:22,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:22,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-06-05 07:13:22,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772349316] [2021-06-05 07:13:22,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:13:22,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:22,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:13:22,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:13:22,266 INFO L87 Difference]: Start difference. First operand 138 states and 287 transitions. Second operand has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 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 07:13:22,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:22,638 INFO L93 Difference]: Finished difference Result 285 states and 545 transitions. [2021-06-05 07:13:22,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 07:13:22,642 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 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 23 [2021-06-05 07:13:22,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:22,643 INFO L225 Difference]: With dead ends: 285 [2021-06-05 07:13:22,643 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 07:13:22,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 397.0ms TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:13:22,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 07:13:22,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 51. [2021-06-05 07:13:22,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.92) internal successors, (96), 50 states have internal predecessors, (96), 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 07:13:22,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 96 transitions. [2021-06-05 07:13:22,646 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 96 transitions. Word has length 23 [2021-06-05 07:13:22,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:22,646 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 96 transitions. [2021-06-05 07:13:22,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 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 07:13:22,646 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 96 transitions. [2021-06-05 07:13:22,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:13:22,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:22,647 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:13:22,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 07:13:22,861 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:22,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:22,861 INFO L82 PathProgramCache]: Analyzing trace with hash 348698573, now seen corresponding path program 13 times [2021-06-05 07:13:22,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:22,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097959224] [2021-06-05 07:13:22,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:22,929 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:22,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:22,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097959224] [2021-06-05 07:13:22,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097959224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:22,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174234775] [2021-06-05 07:13:22,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:22,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 07:13:22,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:23,038 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:23,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174234775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:23,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:23,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 07:13:23,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261470251] [2021-06-05 07:13:23,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:13:23,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:23,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:13:23,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:13:23,041 INFO L87 Difference]: Start difference. First operand 51 states and 96 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 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 07:13:23,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:23,062 INFO L93 Difference]: Finished difference Result 233 states and 430 transitions. [2021-06-05 07:13:23,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:13:23,062 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 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 24 [2021-06-05 07:13:23,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:23,064 INFO L225 Difference]: With dead ends: 233 [2021-06-05 07:13:23,064 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 07:13:23,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:13:23,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 07:13:23,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 168. [2021-06-05 07:13:23,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.095808383233533) internal successors, (350), 167 states have internal predecessors, (350), 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 07:13:23,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 350 transitions. [2021-06-05 07:13:23,072 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 350 transitions. Word has length 24 [2021-06-05 07:13:23,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:23,073 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 350 transitions. [2021-06-05 07:13:23,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 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 07:13:23,073 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 350 transitions. [2021-06-05 07:13:23,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 07:13:23,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:23,074 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:13:23,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 07:13:23,285 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:23,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:23,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1483217992, now seen corresponding path program 14 times [2021-06-05 07:13:23,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:23,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330149466] [2021-06-05 07:13:23,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:23,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:23,533 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:23,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:23,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330149466] [2021-06-05 07:13:23,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330149466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:23,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478379787] [2021-06-05 07:13:23,533 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:23,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:13:23,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:23,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 07:13:23,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:23,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:13:23,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:13:23,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:13:23,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:13:23,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 07:13:23,660 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:23,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478379787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:23,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:23,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 07:13:23,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631864873] [2021-06-05 07:13:23,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:13:23,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:23,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:13:23,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:13:23,662 INFO L87 Difference]: Start difference. First operand 168 states and 350 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 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) [2021-06-05 07:13:24,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:24,093 INFO L93 Difference]: Finished difference Result 347 states and 667 transitions. [2021-06-05 07:13:24,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:13:24,094 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 07:13:24,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:24,095 INFO L225 Difference]: With dead ends: 347 [2021-06-05 07:13:24,095 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 07:13:24,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 486.0ms TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:13:24,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 07:13:24,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 56. [2021-06-05 07:13:24,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.9272727272727272) internal successors, (106), 55 states have internal predecessors, (106), 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 07:13:24,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 106 transitions. [2021-06-05 07:13:24,098 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 106 transitions. Word has length 25 [2021-06-05 07:13:24,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:24,098 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 106 transitions. [2021-06-05 07:13:24,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 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) [2021-06-05 07:13:24,099 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 106 transitions. [2021-06-05 07:13:24,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:13:24,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:24,099 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:13:24,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:24,321 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:24,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:24,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1265608427, now seen corresponding path program 15 times [2021-06-05 07:13:24,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:24,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584293700] [2021-06-05 07:13:24,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:24,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:24,388 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:24,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:24,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584293700] [2021-06-05 07:13:24,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584293700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:24,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967487186] [2021-06-05 07:13:24,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:24,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 07:13:24,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:24,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 07:13:24,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:24,503 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:24,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967487186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:24,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:24,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 07:13:24,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806724579] [2021-06-05 07:13:24,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:13:24,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:24,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:13:24,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:13:24,505 INFO L87 Difference]: Start difference. First operand 56 states and 106 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 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 07:13:24,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:24,530 INFO L93 Difference]: Finished difference Result 274 states and 509 transitions. [2021-06-05 07:13:24,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 07:13:24,531 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 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 [2021-06-05 07:13:24,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:24,532 INFO L225 Difference]: With dead ends: 274 [2021-06-05 07:13:24,532 INFO L226 Difference]: Without dead ends: 255 [2021-06-05 07:13:24,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:13:24,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-05 07:13:24,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 201. [2021-06-05 07:13:24,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.095) internal successors, (419), 200 states have internal predecessors, (419), 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 07:13:24,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 419 transitions. [2021-06-05 07:13:24,537 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 419 transitions. Word has length 26 [2021-06-05 07:13:24,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:24,537 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 419 transitions. [2021-06-05 07:13:24,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 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 07:13:24,538 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 419 transitions. [2021-06-05 07:13:24,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 07:13:24,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:24,538 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:13:24,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 07:13:24,753 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:24,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:24,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1730380822, now seen corresponding path program 16 times [2021-06-05 07:13:24,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:24,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8524427] [2021-06-05 07:13:24,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:24,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:24,986 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:24,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:24,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8524427] [2021-06-05 07:13:24,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8524427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:24,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197079144] [2021-06-05 07:13:24,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:25,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:13:25,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:25,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 07:13:25,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:25,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:13:25,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:13:25,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:13:25,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:13:25,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 07:13:25,099 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:25,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197079144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:25,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:25,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-06-05 07:13:25,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878040721] [2021-06-05 07:13:25,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:13:25,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:25,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:13:25,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:13:25,101 INFO L87 Difference]: Start difference. First operand 201 states and 419 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 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 07:13:25,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:25,622 INFO L93 Difference]: Finished difference Result 415 states and 801 transitions. [2021-06-05 07:13:25,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:13:25,622 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 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 07:13:25,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:25,623 INFO L225 Difference]: With dead ends: 415 [2021-06-05 07:13:25,624 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 07:13:25,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 548.7ms TimeCoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:13:25,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 07:13:25,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 61. [2021-06-05 07:13:25,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 60 states have internal predecessors, (116), 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 07:13:25,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 116 transitions. [2021-06-05 07:13:25,627 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 116 transitions. Word has length 27 [2021-06-05 07:13:25,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:25,627 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 116 transitions. [2021-06-05 07:13:25,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 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 07:13:25,627 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 116 transitions. [2021-06-05 07:13:25,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:13:25,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:25,628 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:13:25,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 07:13:25,850 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:25,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:25,850 INFO L82 PathProgramCache]: Analyzing trace with hash 2102923853, now seen corresponding path program 17 times [2021-06-05 07:13:25,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:25,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340335459] [2021-06-05 07:13:25,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:25,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:25,918 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:25,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:25,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340335459] [2021-06-05 07:13:25,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340335459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:25,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326078418] [2021-06-05 07:13:25,919 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:25,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:13:25,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:25,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 07:13:25,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:26,020 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:26,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326078418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:26,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:26,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 07:13:26,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83289584] [2021-06-05 07:13:26,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:13:26,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:26,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:13:26,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:13:26,022 INFO L87 Difference]: Start difference. First operand 61 states and 116 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 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 07:13:26,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:26,049 INFO L93 Difference]: Finished difference Result 318 states and 594 transitions. [2021-06-05 07:13:26,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 07:13:26,050 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 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 28 [2021-06-05 07:13:26,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:26,051 INFO L225 Difference]: With dead ends: 318 [2021-06-05 07:13:26,051 INFO L226 Difference]: Without dead ends: 297 [2021-06-05 07:13:26,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:13:26,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-06-05 07:13:26,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 237. [2021-06-05 07:13:26,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.093220338983051) internal successors, (494), 236 states have internal predecessors, (494), 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 07:13:26,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 494 transitions. [2021-06-05 07:13:26,057 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 494 transitions. Word has length 28 [2021-06-05 07:13:26,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:26,057 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 494 transitions. [2021-06-05 07:13:26,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 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 07:13:26,058 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 494 transitions. [2021-06-05 07:13:26,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 07:13:26,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:26,058 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:13:26,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:26,281 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:26,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:26,282 INFO L82 PathProgramCache]: Analyzing trace with hash 2072596664, now seen corresponding path program 18 times [2021-06-05 07:13:26,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:26,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054768373] [2021-06-05 07:13:26,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:26,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:26,556 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:26,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:26,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054768373] [2021-06-05 07:13:26,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054768373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:26,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353298462] [2021-06-05 07:13:26,556 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:26,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:13:26,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:26,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 07:13:26,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:14:00,708 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-06-05 07:14:00,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 10 [2021-06-05 07:14:00,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:14:00,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:14:00,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:14:00,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:3 [2021-06-05 07:14:00,719 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 5 proven. 65 refuted. 40 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:00,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353298462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:00,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:14:00,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 07:14:00,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925032181] [2021-06-05 07:14:00,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 07:14:00,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:14:00,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 07:14:00,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1531, Unknown=42, NotChecked=0, Total=1806 [2021-06-05 07:14:00,721 INFO L87 Difference]: Start difference. First operand 237 states and 494 transitions. Second operand has 43 states, 43 states have (on average 1.255813953488372) internal successors, (54), 42 states have internal predecessors, (54), 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 07:14:03,118 WARN L205 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2021-06-05 07:14:05,209 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 36 [2021-06-05 07:14:08,047 WARN L205 SmtUtils]: Spent 2.54 s on a formula simplification. DAG size of input: 72 DAG size of output: 40 [2021-06-05 07:14:08,650 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-06-05 07:14:09,347 WARN L205 SmtUtils]: Spent 636.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-06-05 07:14:14,517 WARN L205 SmtUtils]: Spent 4.97 s on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2021-06-05 07:14:15,208 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-06-05 07:14:17,083 WARN L205 SmtUtils]: Spent 793.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 37 [2021-06-05 07:14:21,113 WARN L205 SmtUtils]: Spent 3.98 s on a formula simplification. DAG size of input: 66 DAG size of output: 25 [2021-06-05 07:14:23,885 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-06-05 07:14:25,415 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification that was a NOOP. DAG size: 47 [2021-06-05 07:14:27,220 WARN L205 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-06-05 07:14:29,974 WARN L205 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 34 [2021-06-05 07:14:32,097 WARN L205 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 72 DAG size of output: 30 [2021-06-05 07:14:35,140 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-06-05 07:14:40,926 WARN L205 SmtUtils]: Spent 3.07 s on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-06-05 07:14:45,999 WARN L205 SmtUtils]: Spent 4.81 s on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2021-06-05 07:14:52,530 WARN L205 SmtUtils]: Spent 2.47 s on a formula simplification. DAG size of input: 63 DAG size of output: 29 [2021-06-05 07:14:56,586 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-06-05 07:14:58,922 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-06-05 07:15:01,225 WARN L205 SmtUtils]: Spent 891.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-06-05 07:15:09,611 WARN L205 SmtUtils]: Spent 4.86 s on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-06-05 07:15:17,727 WARN L205 SmtUtils]: Spent 3.99 s on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-06-05 07:15:33,862 WARN L205 SmtUtils]: Spent 14.07 s on a formula simplification. DAG size of input: 70 DAG size of output: 19 [2021-06-05 07:15:38,232 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-06-05 07:15:49,715 WARN L205 SmtUtils]: Spent 3.06 s on a formula simplification that was a NOOP. DAG size: 49 [2021-06-05 07:15:58,684 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-06-05 07:16:09,878 WARN L205 SmtUtils]: Spent 5.68 s on a formula simplification. DAG size of input: 61 DAG size of output: 27 [2021-06-05 07:16:27,468 WARN L205 SmtUtils]: Spent 788.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-06-05 07:16:40,165 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-06-05 07:16:45,042 WARN L205 SmtUtils]: Spent 2.41 s on a formula simplification that was a NOOP. DAG size: 40 [2021-06-05 07:17:01,102 WARN L205 SmtUtils]: Spent 3.66 s on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-06-05 07:17:20,325 WARN L205 SmtUtils]: Spent 4.86 s on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-06-05 07:17:38,553 WARN L205 SmtUtils]: Spent 10.63 s on a formula simplification. DAG size of input: 61 DAG size of output: 27 [2021-06-05 07:18:15,680 WARN L205 SmtUtils]: Spent 29.01 s on a formula simplification. DAG size of input: 68 DAG size of output: 34 [2021-06-05 07:18:25,725 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-06-05 07:18:46,464 WARN L205 SmtUtils]: Spent 2.39 s on a formula simplification that was a NOOP. DAG size: 39 [2021-06-05 07:19:03,856 WARN L205 SmtUtils]: Spent 4.50 s on a formula simplification that was a NOOP. DAG size: 46 [2021-06-05 07:19:30,476 WARN L205 SmtUtils]: Spent 8.89 s on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-06-05 07:19:58,875 WARN L205 SmtUtils]: Spent 8.69 s on a formula simplification that was a NOOP. DAG size: 61 [2021-06-05 07:20:24,614 WARN L205 SmtUtils]: Spent 12.71 s on a formula simplification. DAG size of input: 59 DAG size of output: 16 [2021-06-05 07:21:13,662 WARN L205 SmtUtils]: Spent 671.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-06-05 07:21:26,531 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-06-05 07:21:40,510 WARN L205 SmtUtils]: Spent 682.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-06-05 07:22:03,090 WARN L205 SmtUtils]: Spent 2.77 s on a formula simplification that was a NOOP. DAG size: 46 [2021-06-05 07:22:30,466 WARN L205 SmtUtils]: Spent 6.42 s on a formula simplification that was a NOOP. DAG size: 53 [2021-06-05 07:22:54,279 WARN L205 SmtUtils]: Spent 9.21 s on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-06-05 07:23:31,814 WARN L205 SmtUtils]: Spent 13.90 s on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-06-05 07:23:53,435 WARN L205 SmtUtils]: Spent 528.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-06-05 07:24:16,186 WARN L205 SmtUtils]: Spent 704.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-06-05 07:24:45,608 WARN L205 SmtUtils]: Spent 3.39 s on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-06-05 07:25:15,298 WARN L205 SmtUtils]: Spent 4.91 s on a formula simplification that was a NOOP. DAG size: 52 [2021-06-05 07:25:57,841 WARN L205 SmtUtils]: Spent 6.97 s on a formula simplification that was a NOOP. DAG size: 59 [2021-06-05 07:27:14,047 WARN L205 SmtUtils]: Spent 648.00 ms on a formula simplification that was a NOOP. DAG size: 27 Received shutdown request... [2021-06-05 07:27:35,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-06-05 07:27:35,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:27:35,912 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 07:27:35,913 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 07:27:35,914 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 07:27:35,915 INFO L202 PluginConnector]: Adding new model context1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 07:27:35 BasicIcfg [2021-06-05 07:27:35,915 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 07:27:35,915 INFO L168 Benchmark]: Toolchain (without parser) took 886984.83 ms. Allocated memory is still 350.2 MB. Free memory was 329.2 MB in the beginning and 175.0 MB in the end (delta: 154.3 MB). Peak memory consumption was 158.1 MB. Max. memory is 16.0 GB. [2021-06-05 07:27:35,915 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 350.2 MB. Free memory is still 330.2 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 07:27:35,915 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.46 ms. Allocated memory is still 350.2 MB. Free memory was 329.1 MB in the beginning and 327.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 07:27:35,915 INFO L168 Benchmark]: Boogie Preprocessor took 11.70 ms. Allocated memory is still 350.2 MB. Free memory was 327.7 MB in the beginning and 326.7 MB in the end (delta: 946.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 07:27:35,915 INFO L168 Benchmark]: RCFGBuilder took 242.05 ms. Allocated memory is still 350.2 MB. Free memory was 326.7 MB in the beginning and 315.3 MB in the end (delta: 11.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 07:27:35,915 INFO L168 Benchmark]: TraceAbstraction took 886702.96 ms. Allocated memory is still 350.2 MB. Free memory was 314.9 MB in the beginning and 175.0 MB in the end (delta: 140.0 MB). Peak memory consumption was 143.5 MB. Max. memory is 16.0 GB. [2021-06-05 07:27:35,916 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 0.15 ms. Allocated memory is still 350.2 MB. Free memory is still 330.2 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.46 ms. Allocated memory is still 350.2 MB. Free memory was 329.1 MB in the beginning and 327.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.70 ms. Allocated memory is still 350.2 MB. Free memory was 327.7 MB in the beginning and 326.7 MB in the end (delta: 946.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 242.05 ms. Allocated memory is still 350.2 MB. Free memory was 326.7 MB in the beginning and 315.3 MB in the end (delta: 11.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 886702.96 ms. Allocated memory is still 350.2 MB. Free memory was 314.9 MB in the beginning and 175.0 MB in the end (delta: 140.0 MB). Peak memory consumption was 143.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 42]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (237states) and FLOYD_HOARE automaton (currently 107 states, 43 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 147 known predicates. - TimeoutResultAtElement [Line: 42]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (237states) and FLOYD_HOARE automaton (currently 107 states, 43 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 147 known predicates. - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (237states) and FLOYD_HOARE automaton (currently 107 states, 43 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 147 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 886623.5ms, OverallIterations: 20, TraceHistogramMax: 10, EmptinessCheckTime: 39.7ms, AutomataDifference: 836087.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 31.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 658 SDtfs, 2907 SDslu, 5645 SDs, 0 SdLazy, 1680 SolverSat, 831 SolverUnsat, 74 SolverUnknown, 0 SolverNotchecked, 44957.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 797 GetRequests, 377 SyntacticMatches, 15 SemanticMatches, 404 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7123 ImplicationChecksByTransitivity, 813161.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=237occurred in iteration=19, InterpolantAutomatonStates: 202, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 146.5ms AutomataMinimizationTime, 19 MinimizatonAttempts, 1024 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 90.0ms SsaConstructionTime, 367.8ms SatisfiabilityAnalysisTime, 45462.5ms InterpolantComputationTime, 747 NumberOfCodeBlocks, 747 NumberOfCodeBlocksAsserted, 72 NumberOfCheckSat, 709 ConstructedInterpolants, 19 QuantifiedInterpolants, 3222 SizeOfPredicates, 10 NumberOfNonLiveVariables, 1519 ConjunctsInSsa, 352 ConjunctsInUnsatCore, 38 InterpolantComputations, 2 PerfectInterpolantSequences, 424/1617 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 RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown