/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 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 00:34:30,075 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 00:34:30,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 00:34:30,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-11 00:34:30,157 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 [2021-03-11 00:34:30,183 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 00:34:30,183 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 00:34:30,184 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-11 00:34:30,184 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-11 00:34:30,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 00:34:30,186 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 00:34:30,186 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 00:34:30,187 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 00:34:30,187 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 00:34:30,187 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 00:34:30,187 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 00:34:30,187 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 00:34:30,188 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 00:34:30,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 00:34:30,188 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 00:34:30,188 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 00:34:30,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 00:34:30,188 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 00:34:30,188 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 00:34:30,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 00:34:30,188 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 00:34:30,188 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 00:34:30,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 00:34:30,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 00:34:30,189 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 00:34:30,189 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 00:34:30,189 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 00:34:30,189 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 00:34:30,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 00:34:30,189 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-11 00:34:30,189 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-11 00:34:30,189 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 00:34:30,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 00:34:30,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 00:34:30,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 00:34:30,450 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 00:34:30,451 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 00:34:30,452 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/context1.wvr.bpl [2021-03-11 00:34:30,458 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/context1.wvr.bpl' [2021-03-11 00:34:30,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 00:34:30,485 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 00:34:30,486 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 00:34:30,486 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 00:34:30,486 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 00:34:30,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:34:30" (1/1) ... [2021-03-11 00:34:30,499 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:34:30" (1/1) ... [2021-03-11 00:34:30,503 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 00:34:30,504 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 00:34:30,504 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 00:34:30,504 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 00:34:30,509 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:34:30" (1/1) ... [2021-03-11 00:34:30,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:34:30" (1/1) ... [2021-03-11 00:34:30,509 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:34:30" (1/1) ... [2021-03-11 00:34:30,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:34:30" (1/1) ... [2021-03-11 00:34:30,511 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:34:30" (1/1) ... [2021-03-11 00:34:30,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:34:30" (1/1) ... [2021-03-11 00:34:30,512 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:34:30" (1/1) ... [2021-03-11 00:34:30,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 00:34:30,513 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 00:34:30,513 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 00:34:30,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 00:34:30,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:34:30" (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 [2021-03-11 00:34:30,562 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-11 00:34:30,562 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-11 00:34:30,563 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-11 00:34:30,563 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-11 00:34:30,563 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-11 00:34:30,563 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-11 00:34:30,563 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 00:34:30,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 00:34:30,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 00:34:30,564 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 00:34:30,748 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 00:34:30,748 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-03-11 00:34:30,749 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-03-11 00:34:30,749 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-03-11 00:34:30,750 INFO L202 PluginConnector]: Adding new model context1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 12:34:30 BoogieIcfgContainer [2021-03-11 00:34:30,750 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 00:34:30,751 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 00:34:30,751 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 00:34:30,753 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 00:34:30,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:34:30" (1/2) ... [2021-03-11 00:34:30,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c551980 and model type context1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 12:34:30, skipping insertion in model container [2021-03-11 00:34:30,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 12:34:30" (2/2) ... [2021-03-11 00:34:30,755 INFO L111 eAbstractionObserver]: Analyzing ICFG context1.wvr.bpl [2021-03-11 00:34:30,759 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-11 00:34:30,763 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 00:34:30,766 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 00:34:30,767 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 00:34:30,817 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-11 00:34:30,827 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-11 00:34:30,848 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 00:34:30,848 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-11 00:34:30,849 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 00:34:30,849 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 00:34:30,849 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 00:34:30,849 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 00:34:30,849 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 00:34:30,849 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 00:34:30,868 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-03-11 00:34:30,884 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) [2021-03-11 00:34:30,886 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) [2021-03-11 00:34:30,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-03-11 00:34:30,890 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:30,890 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:34:30,890 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:30,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:30,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1225879624, now seen corresponding path program 1 times [2021-03-11 00:34:30,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:30,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924888293] [2021-03-11 00:34:30,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:30,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:31,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:31,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924888293] [2021-03-11 00:34:31,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:34:31,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 00:34:31,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091483835] [2021-03-11 00:34:31,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 00:34:31,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:31,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 00:34:31,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 00:34:31,022 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) [2021-03-11 00:34:31,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:31,042 INFO L93 Difference]: Finished difference Result 20 states and 34 transitions. [2021-03-11 00:34:31,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 00:34:31,043 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 [2021-03-11 00:34:31,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:31,052 INFO L225 Difference]: With dead ends: 20 [2021-03-11 00:34:31,052 INFO L226 Difference]: Without dead ends: 16 [2021-03-11 00:34:31,053 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 00:34:31,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-03-11 00:34:31,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-03-11 00:34:31,073 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) [2021-03-11 00:34:31,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 27 transitions. [2021-03-11 00:34:31,074 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 27 transitions. Word has length 9 [2021-03-11 00:34:31,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:31,075 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 27 transitions. [2021-03-11 00:34:31,075 INFO L481 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) [2021-03-11 00:34:31,075 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 27 transitions. [2021-03-11 00:34:31,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-11 00:34:31,076 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:31,076 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:34:31,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 00:34:31,077 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:31,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:31,081 INFO L82 PathProgramCache]: Analyzing trace with hash 653163243, now seen corresponding path program 1 times [2021-03-11 00:34:31,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:31,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063969483] [2021-03-11 00:34:31,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:31,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:31,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:31,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063969483] [2021-03-11 00:34:31,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:34:31,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 00:34:31,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830933495] [2021-03-11 00:34:31,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 00:34:31,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:31,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 00:34:31,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 00:34:31,108 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) [2021-03-11 00:34:31,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:31,112 INFO L93 Difference]: Finished difference Result 21 states and 34 transitions. [2021-03-11 00:34:31,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 00:34:31,113 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 [2021-03-11 00:34:31,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:31,113 INFO L225 Difference]: With dead ends: 21 [2021-03-11 00:34:31,113 INFO L226 Difference]: Without dead ends: 18 [2021-03-11 00:34:31,114 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 00:34:31,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-03-11 00:34:31,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-03-11 00:34:31,116 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) [2021-03-11 00:34:31,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 30 transitions. [2021-03-11 00:34:31,116 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 30 transitions. Word has length 10 [2021-03-11 00:34:31,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:31,117 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 30 transitions. [2021-03-11 00:34:31,117 INFO L481 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) [2021-03-11 00:34:31,117 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 30 transitions. [2021-03-11 00:34:31,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-11 00:34:31,117 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:31,117 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:34:31,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 00:34:31,117 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:31,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:31,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1382019562, now seen corresponding path program 1 times [2021-03-11 00:34:31,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:31,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98263164] [2021-03-11 00:34:31,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:31,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:31,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98263164] [2021-03-11 00:34:31,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282922873] [2021-03-11 00:34:31,150 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 [2021-03-11 00:34:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:31,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:34:31,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:31,261 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 [2021-03-11 00:34:31,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:34:31,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:34:31,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:34:31,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-11 00:34:31,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:31,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:31,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-03-11 00:34:31,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232760797] [2021-03-11 00:34:31,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:34:31,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:31,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:34:31,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:34:31,278 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) [2021-03-11 00:34:31,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:31,309 INFO L93 Difference]: Finished difference Result 25 states and 43 transitions. [2021-03-11 00:34:31,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 00:34:31,310 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 [2021-03-11 00:34:31,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:31,311 INFO L225 Difference]: With dead ends: 25 [2021-03-11 00:34:31,314 INFO L226 Difference]: Without dead ends: 21 [2021-03-11 00:34:31,314 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-11 00:34:31,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-03-11 00:34:31,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-03-11 00:34:31,316 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) [2021-03-11 00:34:31,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 36 transitions. [2021-03-11 00:34:31,317 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 36 transitions. Word has length 11 [2021-03-11 00:34:31,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:31,317 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 36 transitions. [2021-03-11 00:34:31,317 INFO L481 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) [2021-03-11 00:34:31,317 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 36 transitions. [2021-03-11 00:34:31,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-11 00:34:31,317 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:31,318 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:34:31,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-03-11 00:34:31,530 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:31,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:31,531 INFO L82 PathProgramCache]: Analyzing trace with hash 107792461, now seen corresponding path program 2 times [2021-03-11 00:34:31,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:31,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426156950] [2021-03-11 00:34:31,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:31,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426156950] [2021-03-11 00:34:31,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759268867] [2021-03-11 00:34:31,559 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 [2021-03-11 00:34:31,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:34:31,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:31,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-11 00:34:31,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:31,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:31,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:31,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-03-11 00:34:31,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182896076] [2021-03-11 00:34:31,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 00:34:31,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:31,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 00:34:31,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-11 00:34:31,652 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) [2021-03-11 00:34:31,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:31,662 INFO L93 Difference]: Finished difference Result 50 states and 82 transitions. [2021-03-11 00:34:31,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 00:34:31,662 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 [2021-03-11 00:34:31,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:31,664 INFO L225 Difference]: With dead ends: 50 [2021-03-11 00:34:31,664 INFO L226 Difference]: Without dead ends: 45 [2021-03-11 00:34:31,665 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-11 00:34:31,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-03-11 00:34:31,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2021-03-11 00:34:31,668 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) [2021-03-11 00:34:31,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2021-03-11 00:34:31,669 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2021-03-11 00:34:31,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:31,669 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2021-03-11 00:34:31,669 INFO L481 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) [2021-03-11 00:34:31,669 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2021-03-11 00:34:31,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-11 00:34:31,670 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:31,670 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:34:31,879 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:34:31,879 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:31,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:31,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1492763464, now seen corresponding path program 3 times [2021-03-11 00:34:31,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:31,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743509448] [2021-03-11 00:34:31,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:31,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:31,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:31,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743509448] [2021-03-11 00:34:31,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552792297] [2021-03-11 00:34:31,981 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 [2021-03-11 00:34:32,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:34:32,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:32,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-11 00:34:32,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:32,053 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 [2021-03-11 00:34:32,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:34:32,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:34:32,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:34:32,056 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-11 00:34:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:32,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:32,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-03-11 00:34:32,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316316988] [2021-03-11 00:34:32,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-11 00:34:32,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:32,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-11 00:34:32,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-11 00:34:32,064 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) [2021-03-11 00:34:32,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:32,111 INFO L93 Difference]: Finished difference Result 65 states and 115 transitions. [2021-03-11 00:34:32,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-11 00:34:32,111 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 [2021-03-11 00:34:32,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:32,112 INFO L225 Difference]: With dead ends: 65 [2021-03-11 00:34:32,112 INFO L226 Difference]: Without dead ends: 39 [2021-03-11 00:34:32,112 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:34:32,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-03-11 00:34:32,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2021-03-11 00:34:32,115 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) [2021-03-11 00:34:32,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2021-03-11 00:34:32,115 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 13 [2021-03-11 00:34:32,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:32,116 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2021-03-11 00:34:32,116 INFO L481 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) [2021-03-11 00:34:32,116 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2021-03-11 00:34:32,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-11 00:34:32,116 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:32,116 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:34:32,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:34:32,328 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:32,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:32,329 INFO L82 PathProgramCache]: Analyzing trace with hash 969698795, now seen corresponding path program 4 times [2021-03-11 00:34:32,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:32,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476270434] [2021-03-11 00:34:32,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:32,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:32,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:32,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476270434] [2021-03-11 00:34:32,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094158688] [2021-03-11 00:34:32,395 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 [2021-03-11 00:34:32,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:34:32,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:32,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:34:32,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:32,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:32,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:32,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-03-11 00:34:32,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351620523] [2021-03-11 00:34:32,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:34:32,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:32,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:34:32,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:34:32,514 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) [2021-03-11 00:34:32,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:32,526 INFO L93 Difference]: Finished difference Result 73 states and 125 transitions. [2021-03-11 00:34:32,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 00:34:32,528 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 [2021-03-11 00:34:32,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:32,529 INFO L225 Difference]: With dead ends: 73 [2021-03-11 00:34:32,529 INFO L226 Difference]: Without dead ends: 66 [2021-03-11 00:34:32,529 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:34:32,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-03-11 00:34:32,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2021-03-11 00:34:32,533 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) [2021-03-11 00:34:32,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 95 transitions. [2021-03-11 00:34:32,534 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 95 transitions. Word has length 14 [2021-03-11 00:34:32,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:32,534 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 95 transitions. [2021-03-11 00:34:32,534 INFO L481 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) [2021-03-11 00:34:32,534 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 95 transitions. [2021-03-11 00:34:32,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-11 00:34:32,535 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:32,535 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:34:32,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:34:32,755 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:32,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:32,756 INFO L82 PathProgramCache]: Analyzing trace with hash 433746838, now seen corresponding path program 5 times [2021-03-11 00:34:32,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:32,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557728585] [2021-03-11 00:34:32,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:32,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:32,853 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:32,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557728585] [2021-03-11 00:34:32,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829624536] [2021-03-11 00:34:32,854 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 [2021-03-11 00:34:32,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:34:32,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:32,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-11 00:34:32,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:37,133 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-03-11 00:34:37,133 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 [2021-03-11 00:34:37,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:34:37,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:34:37,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:34:37,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:3 [2021-03-11 00:34:37,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 9 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:37,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:37,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-11 00:34:37,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442075686] [2021-03-11 00:34:37,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:34:37,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:37,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:34:37,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=168, Unknown=2, NotChecked=0, Total=210 [2021-03-11 00:34:37,146 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) [2021-03-11 00:34:37,480 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-11 00:34:39,645 WARN L205 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:34:43,688 WARN L205 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 25 [2021-03-11 00:34:51,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:51,170 INFO L93 Difference]: Finished difference Result 229 states and 428 transitions. [2021-03-11 00:34:51,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:34:51,171 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 [2021-03-11 00:34:51,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:51,172 INFO L225 Difference]: With dead ends: 229 [2021-03-11 00:34:51,172 INFO L226 Difference]: Without dead ends: 116 [2021-03-11 00:34:51,172 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 10662.4ms TimeCoverageRelationStatistics Valid=204, Invalid=723, Unknown=3, NotChecked=0, Total=930 [2021-03-11 00:34:51,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-03-11 00:34:51,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 56. [2021-03-11 00:34:51,177 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) [2021-03-11 00:34:51,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 113 transitions. [2021-03-11 00:34:51,178 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 113 transitions. Word has length 15 [2021-03-11 00:34:51,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:51,178 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 113 transitions. [2021-03-11 00:34:51,178 INFO L481 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) [2021-03-11 00:34:51,178 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 113 transitions. [2021-03-11 00:34:51,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-11 00:34:51,178 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:51,178 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:34:51,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-03-11 00:34:51,386 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:51,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:51,386 INFO L82 PathProgramCache]: Analyzing trace with hash 908220856, now seen corresponding path program 6 times [2021-03-11 00:34:51,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:51,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696865698] [2021-03-11 00:34:51,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:51,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:51,478 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:51,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696865698] [2021-03-11 00:34:51,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225062339] [2021-03-11 00:34:51,479 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 [2021-03-11 00:34:51,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:34:51,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:51,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-11 00:34:51,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:51,546 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 [2021-03-11 00:34:51,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:34:51,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:34:51,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:34:51,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-11 00:34:51,553 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:51,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:51,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-11 00:34:51,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011900785] [2021-03-11 00:34:51,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:34:51,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:51,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:34:51,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:34:51,554 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) [2021-03-11 00:34:51,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:51,673 INFO L93 Difference]: Finished difference Result 121 states and 226 transitions. [2021-03-11 00:34:51,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:34:51,674 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 [2021-03-11 00:34:51,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:51,674 INFO L225 Difference]: With dead ends: 121 [2021-03-11 00:34:51,674 INFO L226 Difference]: Without dead ends: 77 [2021-03-11 00:34:51,674 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 132.1ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:34:51,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-03-11 00:34:51,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 36. [2021-03-11 00:34:51,677 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) [2021-03-11 00:34:51,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 66 transitions. [2021-03-11 00:34:51,678 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 66 transitions. Word has length 17 [2021-03-11 00:34:51,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:51,678 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 66 transitions. [2021-03-11 00:34:51,678 INFO L481 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) [2021-03-11 00:34:51,678 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 66 transitions. [2021-03-11 00:34:51,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-11 00:34:51,678 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:51,678 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:34:51,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:34:51,883 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:51,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:51,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1909198613, now seen corresponding path program 7 times [2021-03-11 00:34:51,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:51,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124001810] [2021-03-11 00:34:51,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:51,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:51,927 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:51,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124001810] [2021-03-11 00:34:51,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208464131] [2021-03-11 00:34:51,927 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 [2021-03-11 00:34:51,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:51,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:34:51,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:51,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:51,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-03-11 00:34:51,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385355821] [2021-03-11 00:34:51,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-11 00:34:51,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:51,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-11 00:34:51,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-03-11 00:34:51,988 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) [2021-03-11 00:34:52,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:52,000 INFO L93 Difference]: Finished difference Result 128 states and 229 transitions. [2021-03-11 00:34:52,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-11 00:34:52,000 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 [2021-03-11 00:34:52,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:52,001 INFO L225 Difference]: With dead ends: 128 [2021-03-11 00:34:52,001 INFO L226 Difference]: Without dead ends: 117 [2021-03-11 00:34:52,001 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.6ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-03-11 00:34:52,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-03-11 00:34:52,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 87. [2021-03-11 00:34:52,005 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) [2021-03-11 00:34:52,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 179 transitions. [2021-03-11 00:34:52,006 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 179 transitions. Word has length 18 [2021-03-11 00:34:52,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:52,006 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 179 transitions. [2021-03-11 00:34:52,006 INFO L481 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) [2021-03-11 00:34:52,006 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 179 transitions. [2021-03-11 00:34:52,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-11 00:34:52,007 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:52,007 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:34:52,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:34:52,225 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:52,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:52,225 INFO L82 PathProgramCache]: Analyzing trace with hash 119613718, now seen corresponding path program 8 times [2021-03-11 00:34:52,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:52,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871424690] [2021-03-11 00:34:52,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:52,347 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:52,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871424690] [2021-03-11 00:34:52,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994890064] [2021-03-11 00:34:52,348 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 [2021-03-11 00:34:52,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:34:52,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:52,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-11 00:34:52,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:52,422 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 [2021-03-11 00:34:52,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:34:52,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:34:52,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:34:52,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-11 00:34:52,430 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:52,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:52,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-03-11 00:34:52,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616953814] [2021-03-11 00:34:52,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:34:52,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:52,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:34:52,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:34:52,432 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) [2021-03-11 00:34:52,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:52,616 INFO L93 Difference]: Finished difference Result 179 states and 337 transitions. [2021-03-11 00:34:52,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:34:52,616 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 [2021-03-11 00:34:52,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:52,616 INFO L225 Difference]: With dead ends: 179 [2021-03-11 00:34:52,616 INFO L226 Difference]: Without dead ends: 105 [2021-03-11 00:34:52,617 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 208.2ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:34:52,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-03-11 00:34:52,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 41. [2021-03-11 00:34:52,625 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) [2021-03-11 00:34:52,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2021-03-11 00:34:52,627 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 19 [2021-03-11 00:34:52,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:52,628 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2021-03-11 00:34:52,628 INFO L481 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) [2021-03-11 00:34:52,628 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2021-03-11 00:34:52,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-11 00:34:52,630 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:52,630 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:34:52,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-03-11 00:34:52,839 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:52,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:52,840 INFO L82 PathProgramCache]: Analyzing trace with hash -586216115, now seen corresponding path program 9 times [2021-03-11 00:34:52,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:52,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506042475] [2021-03-11 00:34:52,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:52,879 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:52,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506042475] [2021-03-11 00:34:52,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493819298] [2021-03-11 00:34:52,879 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 [2021-03-11 00:34:52,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:34:52,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:52,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-11 00:34:52,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:52,938 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:52,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:52,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-11 00:34:52,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675782905] [2021-03-11 00:34:52,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 00:34:52,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:52,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 00:34:52,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:34:52,940 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) [2021-03-11 00:34:52,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:52,953 INFO L93 Difference]: Finished difference Result 160 states and 290 transitions. [2021-03-11 00:34:52,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 00:34:52,955 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 [2021-03-11 00:34:52,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:52,957 INFO L225 Difference]: With dead ends: 160 [2021-03-11 00:34:52,957 INFO L226 Difference]: Without dead ends: 147 [2021-03-11 00:34:52,958 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:34:52,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-03-11 00:34:52,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 111. [2021-03-11 00:34:52,967 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) [2021-03-11 00:34:52,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 230 transitions. [2021-03-11 00:34:52,968 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 230 transitions. Word has length 20 [2021-03-11 00:34:52,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:52,968 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 230 transitions. [2021-03-11 00:34:52,968 INFO L481 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) [2021-03-11 00:34:52,968 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 230 transitions. [2021-03-11 00:34:52,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-11 00:34:52,970 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:52,970 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:34:53,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:34:53,183 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:53,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:53,183 INFO L82 PathProgramCache]: Analyzing trace with hash -812718408, now seen corresponding path program 10 times [2021-03-11 00:34:53,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:53,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708360767] [2021-03-11 00:34:53,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:53,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:53,316 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:53,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708360767] [2021-03-11 00:34:53,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194780767] [2021-03-11 00:34:53,316 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 [2021-03-11 00:34:53,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:34:53,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:53,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:34:53,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:53,387 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 [2021-03-11 00:34:53,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:34:53,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:34:53,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:34:53,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-11 00:34:53,394 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:53,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:53,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-03-11 00:34:53,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768920243] [2021-03-11 00:34:53,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:34:53,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:53,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:34:53,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:34:53,396 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) [2021-03-11 00:34:53,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:53,639 INFO L93 Difference]: Finished difference Result 229 states and 435 transitions. [2021-03-11 00:34:53,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-11 00:34:53,639 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 [2021-03-11 00:34:53,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:53,640 INFO L225 Difference]: With dead ends: 229 [2021-03-11 00:34:53,640 INFO L226 Difference]: Without dead ends: 135 [2021-03-11 00:34:53,640 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 275.9ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:34:53,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-03-11 00:34:53,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 46. [2021-03-11 00:34:53,651 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) [2021-03-11 00:34:53,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 86 transitions. [2021-03-11 00:34:53,652 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 86 transitions. Word has length 21 [2021-03-11 00:34:53,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:53,652 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 86 transitions. [2021-03-11 00:34:53,652 INFO L481 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) [2021-03-11 00:34:53,652 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 86 transitions. [2021-03-11 00:34:53,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:34:53,654 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:53,654 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:34:53,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:34:53,868 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:53,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:53,868 INFO L82 PathProgramCache]: Analyzing trace with hash 576259051, now seen corresponding path program 11 times [2021-03-11 00:34:53,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:53,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385486398] [2021-03-11 00:34:53,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:53,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:53,931 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:53,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385486398] [2021-03-11 00:34:53,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578937893] [2021-03-11 00:34:53,932 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 [2021-03-11 00:34:53,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-11 00:34:53,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:53,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-11 00:34:53,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:54,004 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:54,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:54,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-11 00:34:54,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209022861] [2021-03-11 00:34:54,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:34:54,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:54,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:34:54,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:34:54,007 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) [2021-03-11 00:34:54,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:54,022 INFO L93 Difference]: Finished difference Result 195 states and 357 transitions. [2021-03-11 00:34:54,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 00:34:54,022 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 [2021-03-11 00:34:54,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:54,024 INFO L225 Difference]: With dead ends: 195 [2021-03-11 00:34:54,024 INFO L226 Difference]: Without dead ends: 180 [2021-03-11 00:34:54,024 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:34:54,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-03-11 00:34:54,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 138. [2021-03-11 00:34:54,028 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) [2021-03-11 00:34:54,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 287 transitions. [2021-03-11 00:34:54,029 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 287 transitions. Word has length 22 [2021-03-11 00:34:54,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:54,029 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 287 transitions. [2021-03-11 00:34:54,029 INFO L481 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) [2021-03-11 00:34:54,029 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 287 transitions. [2021-03-11 00:34:54,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-11 00:34:54,030 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:54,030 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:34:54,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-03-11 00:34:54,243 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:54,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:54,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1950887574, now seen corresponding path program 12 times [2021-03-11 00:34:54,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:54,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565075161] [2021-03-11 00:34:54,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:54,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:54,407 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:54,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565075161] [2021-03-11 00:34:54,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884355847] [2021-03-11 00:34:54,407 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 [2021-03-11 00:34:54,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-11 00:34:54,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:54,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-11 00:34:54,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:54,485 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 [2021-03-11 00:34:54,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:34:54,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:34:54,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:34:54,488 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-11 00:34:54,497 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:54,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:54,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-03-11 00:34:54,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086096917] [2021-03-11 00:34:54,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:34:54,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:54,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:34:54,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:34:54,498 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) [2021-03-11 00:34:54,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:54,794 INFO L93 Difference]: Finished difference Result 285 states and 545 transitions. [2021-03-11 00:34:54,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-11 00:34:54,794 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 [2021-03-11 00:34:54,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:54,795 INFO L225 Difference]: With dead ends: 285 [2021-03-11 00:34:54,795 INFO L226 Difference]: Without dead ends: 169 [2021-03-11 00:34:54,795 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 311.1ms TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:34:54,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-03-11 00:34:54,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 51. [2021-03-11 00:34:54,797 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) [2021-03-11 00:34:54,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 96 transitions. [2021-03-11 00:34:54,797 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 96 transitions. Word has length 23 [2021-03-11 00:34:54,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:54,797 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 96 transitions. [2021-03-11 00:34:54,798 INFO L481 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) [2021-03-11 00:34:54,798 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 96 transitions. [2021-03-11 00:34:54,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:34:54,798 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:54,798 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:34:54,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-03-11 00:34:54,998 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:54,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:54,999 INFO L82 PathProgramCache]: Analyzing trace with hash 348698573, now seen corresponding path program 13 times [2021-03-11 00:34:54,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:54,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204745117] [2021-03-11 00:34:54,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:55,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:55,060 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:55,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204745117] [2021-03-11 00:34:55,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579376825] [2021-03-11 00:34:55,061 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 [2021-03-11 00:34:55,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:55,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-11 00:34:55,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:55,162 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:55,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:55,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-11 00:34:55,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205797110] [2021-03-11 00:34:55,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:34:55,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:55,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:34:55,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:34:55,176 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) [2021-03-11 00:34:55,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:55,195 INFO L93 Difference]: Finished difference Result 233 states and 430 transitions. [2021-03-11 00:34:55,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 00:34:55,196 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 [2021-03-11 00:34:55,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:55,197 INFO L225 Difference]: With dead ends: 233 [2021-03-11 00:34:55,197 INFO L226 Difference]: Without dead ends: 216 [2021-03-11 00:34:55,197 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:34:55,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-03-11 00:34:55,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 168. [2021-03-11 00:34:55,200 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) [2021-03-11 00:34:55,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 350 transitions. [2021-03-11 00:34:55,201 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 350 transitions. Word has length 24 [2021-03-11 00:34:55,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:55,201 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 350 transitions. [2021-03-11 00:34:55,201 INFO L481 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) [2021-03-11 00:34:55,201 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 350 transitions. [2021-03-11 00:34:55,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-11 00:34:55,201 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:55,201 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:34:55,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-11 00:34:55,415 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:55,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:55,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1483217992, now seen corresponding path program 14 times [2021-03-11 00:34:55,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:55,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813808874] [2021-03-11 00:34:55,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:55,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:55,622 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:55,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813808874] [2021-03-11 00:34:55,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637748482] [2021-03-11 00:34:55,622 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 [2021-03-11 00:34:55,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:34:55,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:55,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-11 00:34:55,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:55,709 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 [2021-03-11 00:34:55,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:34:55,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:34:55,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:34:55,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-11 00:34:55,715 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:55,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:55,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-03-11 00:34:55,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081075613] [2021-03-11 00:34:55,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:34:55,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:55,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:34:55,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:34:55,717 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) [2021-03-11 00:34:56,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:56,079 INFO L93 Difference]: Finished difference Result 347 states and 667 transitions. [2021-03-11 00:34:56,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:34:56,080 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 [2021-03-11 00:34:56,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:56,081 INFO L225 Difference]: With dead ends: 347 [2021-03-11 00:34:56,081 INFO L226 Difference]: Without dead ends: 207 [2021-03-11 00:34:56,081 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 414.8ms TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:34:56,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-03-11 00:34:56,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 56. [2021-03-11 00:34:56,083 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) [2021-03-11 00:34:56,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 106 transitions. [2021-03-11 00:34:56,083 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 106 transitions. Word has length 25 [2021-03-11 00:34:56,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:56,083 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 106 transitions. [2021-03-11 00:34:56,083 INFO L481 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) [2021-03-11 00:34:56,083 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 106 transitions. [2021-03-11 00:34:56,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:34:56,084 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:56,084 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:34:56,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:34:56,299 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:56,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:56,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1265608427, now seen corresponding path program 15 times [2021-03-11 00:34:56,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:56,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925633669] [2021-03-11 00:34:56,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:56,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:56,354 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:56,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925633669] [2021-03-11 00:34:56,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384441358] [2021-03-11 00:34:56,355 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 [2021-03-11 00:34:56,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-11 00:34:56,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:56,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-11 00:34:56,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:56,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:56,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-11 00:34:56,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968177792] [2021-03-11 00:34:56,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:34:56,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:56,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:34:56,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:34:56,438 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) [2021-03-11 00:34:56,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:56,465 INFO L93 Difference]: Finished difference Result 274 states and 509 transitions. [2021-03-11 00:34:56,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:34:56,465 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 [2021-03-11 00:34:56,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:56,466 INFO L225 Difference]: With dead ends: 274 [2021-03-11 00:34:56,466 INFO L226 Difference]: Without dead ends: 255 [2021-03-11 00:34:56,466 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:34:56,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-03-11 00:34:56,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 201. [2021-03-11 00:34:56,470 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) [2021-03-11 00:34:56,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 419 transitions. [2021-03-11 00:34:56,470 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 419 transitions. Word has length 26 [2021-03-11 00:34:56,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:56,470 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 419 transitions. [2021-03-11 00:34:56,470 INFO L481 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) [2021-03-11 00:34:56,470 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 419 transitions. [2021-03-11 00:34:56,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-11 00:34:56,471 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:56,471 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:34:56,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-11 00:34:56,680 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:56,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:56,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1730380822, now seen corresponding path program 16 times [2021-03-11 00:34:56,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:56,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925350397] [2021-03-11 00:34:56,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:56,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:56,912 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:56,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925350397] [2021-03-11 00:34:56,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329951083] [2021-03-11 00:34:56,913 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 [2021-03-11 00:34:56,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:34:56,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:56,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-11 00:34:56,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:56,998 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 [2021-03-11 00:34:56,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:34:57,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:34:57,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:34:57,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-03-11 00:34:57,004 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:57,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:57,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-03-11 00:34:57,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596744055] [2021-03-11 00:34:57,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:34:57,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:57,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:34:57,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:34:57,006 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) [2021-03-11 00:34:57,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:57,485 INFO L93 Difference]: Finished difference Result 415 states and 801 transitions. [2021-03-11 00:34:57,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:34:57,486 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 [2021-03-11 00:34:57,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:57,486 INFO L225 Difference]: With dead ends: 415 [2021-03-11 00:34:57,486 INFO L226 Difference]: Without dead ends: 249 [2021-03-11 00:34:57,487 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 508.1ms TimeCoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:34:57,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-03-11 00:34:57,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 61. [2021-03-11 00:34:57,489 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) [2021-03-11 00:34:57,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 116 transitions. [2021-03-11 00:34:57,489 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 116 transitions. Word has length 27 [2021-03-11 00:34:57,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:57,489 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 116 transitions. [2021-03-11 00:34:57,489 INFO L481 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) [2021-03-11 00:34:57,489 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 116 transitions. [2021-03-11 00:34:57,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:34:57,490 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:57,490 INFO L519 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:34:57,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-11 00:34:57,696 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:57,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:57,696 INFO L82 PathProgramCache]: Analyzing trace with hash 2102923853, now seen corresponding path program 17 times [2021-03-11 00:34:57,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:57,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696752797] [2021-03-11 00:34:57,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:57,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:57,771 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:57,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696752797] [2021-03-11 00:34:57,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121343692] [2021-03-11 00:34:57,772 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 [2021-03-11 00:34:57,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-11 00:34:57,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:57,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-11 00:34:57,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:57,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:57,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-11 00:34:57,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389017440] [2021-03-11 00:34:57,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:34:57,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:57,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:34:57,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:34:57,874 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) [2021-03-11 00:34:57,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:57,897 INFO L93 Difference]: Finished difference Result 318 states and 594 transitions. [2021-03-11 00:34:57,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-11 00:34:57,897 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 [2021-03-11 00:34:57,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:57,898 INFO L225 Difference]: With dead ends: 318 [2021-03-11 00:34:57,898 INFO L226 Difference]: Without dead ends: 297 [2021-03-11 00:34:57,898 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:34:57,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-03-11 00:34:57,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 237. [2021-03-11 00:34:57,903 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) [2021-03-11 00:34:57,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 494 transitions. [2021-03-11 00:34:57,904 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 494 transitions. Word has length 28 [2021-03-11 00:34:57,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:57,904 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 494 transitions. [2021-03-11 00:34:57,904 INFO L481 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) [2021-03-11 00:34:57,904 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 494 transitions. [2021-03-11 00:34:57,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-11 00:34:57,905 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:57,905 INFO L519 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:34:58,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:34:58,111 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:58,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:58,112 INFO L82 PathProgramCache]: Analyzing trace with hash 2072596664, now seen corresponding path program 18 times [2021-03-11 00:34:58,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:58,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304261489] [2021-03-11 00:34:58,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:58,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:58,368 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:58,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304261489] [2021-03-11 00:34:58,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772304763] [2021-03-11 00:34:58,368 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 [2021-03-11 00:34:58,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-11 00:34:58,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:58,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 44 conjunts are in the unsatisfiable core [2021-03-11 00:34:58,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:35:21,165 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-03-11 00:35:21,166 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 [2021-03-11 00:35:21,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:35:21,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:35:21,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:35:21,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:3 [2021-03-11 00:35:21,179 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 5 proven. 65 refuted. 40 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:35:21,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:35:21,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-03-11 00:35:21,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526162353] [2021-03-11 00:35:21,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-03-11 00:35:21,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:35:21,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-03-11 00:35:21,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1530, Unknown=43, NotChecked=0, Total=1806 [2021-03-11 00:35:21,180 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) [2021-03-11 00:35:25,469 WARN L205 SmtUtils]: Spent 3.96 s on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2021-03-11 00:35:30,321 WARN L205 SmtUtils]: Spent 2.45 s on a formula simplification. DAG size of input: 72 DAG size of output: 32 [2021-03-11 00:35:30,877 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:35:32,588 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-03-11 00:35:33,517 WARN L205 SmtUtils]: Spent 781.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-03-11 00:35:37,105 WARN L205 SmtUtils]: Spent 3.55 s on a formula simplification. DAG size of input: 78 DAG size of output: 46 [2021-03-11 00:35:38,125 WARN L205 SmtUtils]: Spent 768.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-11 00:35:39,073 WARN L205 SmtUtils]: Spent 770.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2021-03-11 00:35:42,579 WARN L205 SmtUtils]: Spent 809.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 37 [2021-03-11 00:35:44,802 WARN L205 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 77 DAG size of output: 34 [2021-03-11 00:35:47,032 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-11 00:35:51,531 WARN L205 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 54 [2021-03-11 00:35:58,100 WARN L205 SmtUtils]: Spent 4.32 s on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-03-11 00:36:05,693 WARN L205 SmtUtils]: Spent 6.22 s on a formula simplification. DAG size of input: 75 DAG size of output: 42 [2021-03-11 00:36:16,218 WARN L205 SmtUtils]: Spent 10.47 s on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2021-03-11 00:36:28,956 WARN L205 SmtUtils]: Spent 3.33 s on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-03-11 00:36:39,656 WARN L205 SmtUtils]: Spent 2.58 s on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2021-03-11 00:36:56,386 WARN L205 SmtUtils]: Spent 12.66 s on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2021-03-11 00:37:08,084 WARN L205 SmtUtils]: Spent 768.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:37:21,048 WARN L205 SmtUtils]: Spent 1.50 s on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:37:31,364 WARN L205 SmtUtils]: Spent 2.88 s on a formula simplification that was a NOOP. DAG size: 50 [2021-03-11 00:37:43,014 WARN L205 SmtUtils]: Spent 7.19 s on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-03-11 00:38:08,647 WARN L205 SmtUtils]: Spent 18.05 s on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2021-03-11 00:38:33,950 WARN L205 SmtUtils]: Spent 21.92 s on a formula simplification. DAG size of input: 81 DAG size of output: 46 [2021-03-11 00:38:56,215 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-03-11 00:39:34,263 WARN L205 SmtUtils]: Spent 5.64 s on a formula simplification that was a NOOP. DAG size: 49 [2021-03-11 00:39:59,263 WARN L205 SmtUtils]: Spent 14.95 s on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-03-11 00:40:30,807 WARN L205 SmtUtils]: Spent 25.07 s on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2021-03-11 00:41:15,271 WARN L205 SmtUtils]: Spent 2.60 s on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:41:40,817 WARN L205 SmtUtils]: Spent 4.00 s on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:42:11,560 WARN L205 SmtUtils]: Spent 6.02 s on a formula simplification that was a NOOP. DAG size: 47 [2021-03-11 00:42:43,399 WARN L205 SmtUtils]: Spent 7.23 s on a formula simplification that was a NOOP. DAG size: 48 [2021-03-11 00:43:05,102 WARN L205 SmtUtils]: Spent 10.03 s on a formula simplification that was a NOOP. DAG size: 55 [2021-03-11 00:43:30,504 WARN L205 SmtUtils]: Spent 12.06 s on a formula simplification that was a NOOP. DAG size: 70 [2021-03-11 00:44:12,607 WARN L205 SmtUtils]: Spent 30.80 s on a formula simplification. DAG size of input: 79 DAG size of output: 35 [2021-03-11 00:44:53,914 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-03-11 00:45:49,661 WARN L205 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:46:23,403 WARN L205 SmtUtils]: Spent 8.02 s on a formula simplification that was a NOOP. DAG size: 46 [2021-03-11 00:46:58,984 WARN L205 SmtUtils]: Spent 12.11 s on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-03-11 00:47:35,398 WARN L205 SmtUtils]: Spent 14.16 s on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-03-11 00:48:05,536 WARN L205 SmtUtils]: Spent 13.20 s on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2021-03-11 00:49:09,053 WARN L205 SmtUtils]: Spent 4.01 s on a formula simplification that was a NOOP. DAG size: 30 Received shutdown request... [2021-03-11 00:49:23,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-03-11 00:49:24,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:49:24,041 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-11 00:49:24,044 WARN L224 ceAbstractionStarter]: Timeout [2021-03-11 00:49:24,044 INFO L202 PluginConnector]: Adding new model context1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 12:49:24 BasicIcfg [2021-03-11 00:49:24,044 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 00:49:24,044 INFO L168 Benchmark]: Toolchain (without parser) took 893562.36 ms. Allocated memory was 255.9 MB in the beginning and 415.2 MB in the end (delta: 159.4 MB). Free memory was 236.6 MB in the beginning and 354.2 MB in the end (delta: -117.6 MB). Peak memory consumption was 42.7 MB. Max. memory is 16.0 GB. [2021-03-11 00:49:24,044 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 00:49:24,044 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.24 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 00:49:24,044 INFO L168 Benchmark]: Boogie Preprocessor took 9.12 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.8 MB in the end (delta: 759.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 00:49:24,044 INFO L168 Benchmark]: RCFGBuilder took 237.00 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 236.3 MB in the end (delta: -2.7 MB). Peak memory consumption was 15.0 MB. Max. memory is 16.0 GB. [2021-03-11 00:49:24,044 INFO L168 Benchmark]: TraceAbstraction took 893292.38 ms. Allocated memory was 255.9 MB in the beginning and 415.2 MB in the end (delta: 159.4 MB). Free memory was 236.3 MB in the beginning and 354.2 MB in the end (delta: -117.9 MB). Peak memory consumption was 42.4 MB. Max. memory is 16.0 GB. [2021-03-11 00:49:24,045 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 17.24 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 9.12 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.8 MB in the end (delta: 759.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 237.00 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 236.3 MB in the end (delta: -2.7 MB). Peak memory consumption was 15.0 MB. Max. memory is 16.0 GB. * TraceAbstraction took 893292.38 ms. Allocated memory was 255.9 MB in the beginning and 415.2 MB in the end (delta: 159.4 MB). Free memory was 236.3 MB in the beginning and 354.2 MB in the end (delta: -117.9 MB). Peak memory consumption was 42.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 47). Cancelled while BasicCegarLoop was constructing difference of abstraction (237states) and FLOYD_HOARE automaton (currently 89 states, 43 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 129 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 893194.4ms, OverallIterations: 20, TraceHistogramMax: 10, EmptinessCheckTime: 18.1ms, AutomataDifference: 858674.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 35.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 657 SDtfs, 2713 SDslu, 5438 SDs, 0 SdLazy, 1643 SolverSat, 800 SolverUnsat, 33 SolverUnknown, 0 SolverNotchecked, 56851.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 774 GetRequests, 369 SyntacticMatches, 20 SemanticMatches, 384 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5425 ImplicationChecksByTransitivity, 816468.7ms 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: 97.1ms AutomataMinimizationTime, 19 MinimizatonAttempts, 1024 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 94.3ms SsaConstructionTime, 374.3ms SatisfiabilityAnalysisTime, 29722.1ms InterpolantComputationTime, 747 NumberOfCodeBlocks, 747 NumberOfCodeBlocksAsserted, 72 NumberOfCheckSat, 709 ConstructedInterpolants, 19 QuantifiedInterpolants, 3222 SizeOfPredicates, 10 NumberOfNonLiveVariables, 1519 ConjunctsInSsa, 352 ConjunctsInUnsatCore, 38 InterpolantComputations, 2 PerfectInterpolantSequences, 425/1617 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