/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/popl20/min-max-dec.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 22:51:59,519 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 22:51:59,520 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 22:51:59,542 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 22:51:59,577 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-10 22:51:59,578 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-10 22:51:59,578 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-10 22:51:59,579 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-10 22:51:59,580 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-10 22:51:59,580 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-10 22:51:59,580 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-10 22:51:59,580 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-10 22:51:59,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-10 22:51:59,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-10 22:51:59,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-10 22:51:59,582 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 [2021-03-10 22:51:59,598 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 22:51:59,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 22:51:59,598 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 22:51:59,598 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 22:51:59,599 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 22:51:59,599 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 22:51:59,600 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 22:51:59,600 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 22:51:59,600 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 22:51:59,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 22:51:59,600 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 22:51:59,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 22:51:59,600 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 22:51:59,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 22:51:59,600 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 22:51:59,601 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 22:51:59,601 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 22:51:59,601 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 22:51:59,601 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 22:51:59,601 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 22:51:59,601 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 22:51:59,601 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 22:51:59,601 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 22:51:59,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 22:51:59,602 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 22:51:59,602 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 22:51:59,602 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 22:51:59,602 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 22:51:59,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 22:51:59,602 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 22:51:59,602 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 22:51:59,602 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 22:51:59,823 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 22:51:59,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 22:51:59,846 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 22:51:59,847 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 22:51:59,849 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 22:51:59,850 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-dec.wvr.bpl [2021-03-10 22:51:59,851 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-dec.wvr.bpl' [2021-03-10 22:51:59,905 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 22:51:59,910 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 22:51:59,911 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 22:51:59,911 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 22:51:59,911 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 22:51:59,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:51:59" (1/1) ... [2021-03-10 22:51:59,928 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:51:59" (1/1) ... [2021-03-10 22:51:59,934 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 22:51:59,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 22:51:59,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 22:51:59,936 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 22:51:59,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:51:59" (1/1) ... [2021-03-10 22:51:59,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:51:59" (1/1) ... [2021-03-10 22:51:59,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:51:59" (1/1) ... [2021-03-10 22:51:59,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:51:59" (1/1) ... [2021-03-10 22:51:59,951 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:51:59" (1/1) ... [2021-03-10 22:51:59,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:51:59" (1/1) ... [2021-03-10 22:51:59,956 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:51:59" (1/1) ... [2021-03-10 22:51:59,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 22:51:59,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 22:51:59,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 22:51:59,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 22:51:59,964 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:51:59" (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 [2021-03-10 22:52:00,024 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 22:52:00,024 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 22:52:00,025 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 22:52:00,025 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 22:52:00,025 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 22:52:00,025 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 22:52:00,025 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 22:52:00,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 22:52:00,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 22:52:00,025 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-10 22:52:00,025 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-10 22:52:00,025 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-10 22:52:00,026 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-03-10 22:52:00,026 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-03-10 22:52:00,026 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-03-10 22:52:00,026 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 22:52:00,189 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 22:52:00,189 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 22:52:00,191 INFO L202 PluginConnector]: Adding new model min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 10:52:00 BoogieIcfgContainer [2021-03-10 22:52:00,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 22:52:00,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 22:52:00,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 22:52:00,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 22:52:00,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:51:59" (1/2) ... [2021-03-10 22:52:00,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46711605 and model type min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 10:52:00, skipping insertion in model container [2021-03-10 22:52:00,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 10:52:00" (2/2) ... [2021-03-10 22:52:00,196 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-dec.wvr.bpl [2021-03-10 22:52:00,200 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 22:52:00,201 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 22:52:00,203 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 22:52:00,204 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 22:52:00,236 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-03-10 22:52:00,247 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-10 22:52:00,261 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 22:52:00,261 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 22:52:00,261 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 22:52:00,261 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 22:52:00,261 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 22:52:00,261 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 22:52:00,261 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 22:52:00,261 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 22:52:00,268 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 35 transitions, 102 flow [2021-03-10 22:52:00,369 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 712 states, 710 states have (on average 3.6450704225352113) internal successors, (2588), 711 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:00,372 INFO L276 IsEmpty]: Start isEmpty. Operand has 712 states, 710 states have (on average 3.6450704225352113) internal successors, (2588), 711 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:00,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 22:52:00,388 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:00,389 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:00,390 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:00,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:00,394 INFO L82 PathProgramCache]: Analyzing trace with hash -353370600, now seen corresponding path program 1 times [2021-03-10 22:52:00,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:00,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150194158] [2021-03-10 22:52:00,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:00,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:00,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:00,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150194158] [2021-03-10 22:52:00,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:52:00,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:52:00,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463204523] [2021-03-10 22:52:00,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:52:00,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:00,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:52:00,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:52:00,591 INFO L87 Difference]: Start difference. First operand has 712 states, 710 states have (on average 3.6450704225352113) internal successors, (2588), 711 states have internal predecessors, (2588), 0 states have call successors, (0), 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 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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) [2021-03-10 22:52:00,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:00,670 INFO L93 Difference]: Finished difference Result 961 states and 3450 transitions. [2021-03-10 22:52:00,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:52:00,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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 [2021-03-10 22:52:00,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:00,692 INFO L225 Difference]: With dead ends: 961 [2021-03-10 22:52:00,693 INFO L226 Difference]: Without dead ends: 614 [2021-03-10 22:52:00,694 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:52:00,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-03-10 22:52:00,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2021-03-10 22:52:00,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 3.592169657422512) internal successors, (2202), 613 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:00,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 2202 transitions. [2021-03-10 22:52:00,759 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 2202 transitions. Word has length 23 [2021-03-10 22:52:00,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:00,760 INFO L480 AbstractCegarLoop]: Abstraction has 614 states and 2202 transitions. [2021-03-10 22:52:00,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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) [2021-03-10 22:52:00,760 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 2202 transitions. [2021-03-10 22:52:00,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 22:52:00,763 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:00,763 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:00,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 22:52:00,763 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:00,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:00,764 INFO L82 PathProgramCache]: Analyzing trace with hash 860248502, now seen corresponding path program 2 times [2021-03-10 22:52:00,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:00,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076349789] [2021-03-10 22:52:00,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:00,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:00,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:00,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076349789] [2021-03-10 22:52:00,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:52:00,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:52:00,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285469941] [2021-03-10 22:52:00,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:52:00,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:00,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:52:00,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:52:00,816 INFO L87 Difference]: Start difference. First operand 614 states and 2202 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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) [2021-03-10 22:52:00,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:00,897 INFO L93 Difference]: Finished difference Result 2435 states and 8733 transitions. [2021-03-10 22:52:00,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:52:00,898 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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 [2021-03-10 22:52:00,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:00,908 INFO L225 Difference]: With dead ends: 2435 [2021-03-10 22:52:00,908 INFO L226 Difference]: Without dead ends: 1497 [2021-03-10 22:52:00,909 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:52:00,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2021-03-10 22:52:00,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 859. [2021-03-10 22:52:00,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 3.5442890442890445) internal successors, (3041), 858 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:00,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 3041 transitions. [2021-03-10 22:52:00,954 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 3041 transitions. Word has length 23 [2021-03-10 22:52:00,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:00,955 INFO L480 AbstractCegarLoop]: Abstraction has 859 states and 3041 transitions. [2021-03-10 22:52:00,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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) [2021-03-10 22:52:00,955 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 3041 transitions. [2021-03-10 22:52:00,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 22:52:00,957 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:00,958 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:00,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 22:52:00,958 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:00,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:00,959 INFO L82 PathProgramCache]: Analyzing trace with hash 2060589364, now seen corresponding path program 3 times [2021-03-10 22:52:00,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:00,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315177606] [2021-03-10 22:52:00,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:00,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:00,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315177606] [2021-03-10 22:52:00,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:52:00,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:52:00,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285592267] [2021-03-10 22:52:00,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:52:00,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:00,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:52:00,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:52:00,990 INFO L87 Difference]: Start difference. First operand 859 states and 3041 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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) [2021-03-10 22:52:01,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:01,117 INFO L93 Difference]: Finished difference Result 3289 states and 11673 transitions. [2021-03-10 22:52:01,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:52:01,118 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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 [2021-03-10 22:52:01,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:01,139 INFO L225 Difference]: With dead ends: 3289 [2021-03-10 22:52:01,139 INFO L226 Difference]: Without dead ends: 2391 [2021-03-10 22:52:01,140 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:52:01,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-03-10 22:52:01,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 910. [2021-03-10 22:52:01,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 3.553355335533553) internal successors, (3230), 909 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:01,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 3230 transitions. [2021-03-10 22:52:01,187 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 3230 transitions. Word has length 23 [2021-03-10 22:52:01,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:01,191 INFO L480 AbstractCegarLoop]: Abstraction has 910 states and 3230 transitions. [2021-03-10 22:52:01,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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) [2021-03-10 22:52:01,191 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 3230 transitions. [2021-03-10 22:52:01,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 22:52:01,194 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:01,194 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:01,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 22:52:01,194 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:01,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:01,195 INFO L82 PathProgramCache]: Analyzing trace with hash -375854000, now seen corresponding path program 4 times [2021-03-10 22:52:01,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:01,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617650137] [2021-03-10 22:52:01,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:01,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:01,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:01,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617650137] [2021-03-10 22:52:01,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:52:01,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:52:01,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427257621] [2021-03-10 22:52:01,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:52:01,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:01,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:52:01,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:52:01,241 INFO L87 Difference]: Start difference. First operand 910 states and 3230 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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) [2021-03-10 22:52:01,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:01,265 INFO L93 Difference]: Finished difference Result 1081 states and 3814 transitions. [2021-03-10 22:52:01,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:52:01,265 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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 [2021-03-10 22:52:01,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:01,271 INFO L225 Difference]: With dead ends: 1081 [2021-03-10 22:52:01,271 INFO L226 Difference]: Without dead ends: 830 [2021-03-10 22:52:01,272 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:52:01,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-03-10 22:52:01,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 830. [2021-03-10 22:52:01,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.4861278648974667) internal successors, (2890), 829 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:01,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2890 transitions. [2021-03-10 22:52:01,294 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2890 transitions. Word has length 23 [2021-03-10 22:52:01,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:01,294 INFO L480 AbstractCegarLoop]: Abstraction has 830 states and 2890 transitions. [2021-03-10 22:52:01,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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) [2021-03-10 22:52:01,295 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2890 transitions. [2021-03-10 22:52:01,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:52:01,297 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:01,297 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:01,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 22:52:01,297 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:01,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:01,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1603494326, now seen corresponding path program 1 times [2021-03-10 22:52:01,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:01,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605584897] [2021-03-10 22:52:01,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:01,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:01,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:01,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605584897] [2021-03-10 22:52:01,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360472049] [2021-03-10 22:52:01,351 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 [2021-03-10 22:52:01,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:01,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 22:52:01,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:01,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:01,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:01,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-03-10 22:52:01,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741598660] [2021-03-10 22:52:01,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:52:01,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:01,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:52:01,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:52:01,529 INFO L87 Difference]: Start difference. First operand 830 states and 2890 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:01,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:01,587 INFO L93 Difference]: Finished difference Result 1914 states and 6600 transitions. [2021-03-10 22:52:01,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 22:52:01,587 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 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 [2021-03-10 22:52:01,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:01,596 INFO L225 Difference]: With dead ends: 1914 [2021-03-10 22:52:01,597 INFO L226 Difference]: Without dead ends: 1914 [2021-03-10 22:52:01,597 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:52:01,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1914 states. [2021-03-10 22:52:01,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1914 to 1087. [2021-03-10 22:52:01,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 3.603130755064457) internal successors, (3913), 1086 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:01,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 3913 transitions. [2021-03-10 22:52:01,633 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 3913 transitions. Word has length 25 [2021-03-10 22:52:01,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:01,633 INFO L480 AbstractCegarLoop]: Abstraction has 1087 states and 3913 transitions. [2021-03-10 22:52:01,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:01,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 3913 transitions. [2021-03-10 22:52:01,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:52:01,638 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:01,638 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:01,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:52:01,852 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:01,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:01,852 INFO L82 PathProgramCache]: Analyzing trace with hash 808417752, now seen corresponding path program 1 times [2021-03-10 22:52:01,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:01,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871947132] [2021-03-10 22:52:01,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:01,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:01,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871947132] [2021-03-10 22:52:01,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:52:01,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:52:01,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269354953] [2021-03-10 22:52:01,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:52:01,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:01,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:52:01,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:52:01,881 INFO L87 Difference]: Start difference. First operand 1087 states and 3913 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 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) [2021-03-10 22:52:01,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:01,922 INFO L93 Difference]: Finished difference Result 1486 states and 5095 transitions. [2021-03-10 22:52:01,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:52:01,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 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 [2021-03-10 22:52:01,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:01,929 INFO L225 Difference]: With dead ends: 1486 [2021-03-10 22:52:01,929 INFO L226 Difference]: Without dead ends: 1456 [2021-03-10 22:52:01,929 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:52:01,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2021-03-10 22:52:01,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1266. [2021-03-10 22:52:01,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 3.5177865612648223) internal successors, (4450), 1265 states have internal predecessors, (4450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:01,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 4450 transitions. [2021-03-10 22:52:01,960 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 4450 transitions. Word has length 25 [2021-03-10 22:52:01,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:01,960 INFO L480 AbstractCegarLoop]: Abstraction has 1266 states and 4450 transitions. [2021-03-10 22:52:01,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 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) [2021-03-10 22:52:01,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 4450 transitions. [2021-03-10 22:52:01,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:52:01,964 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:01,964 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:01,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-10 22:52:01,965 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:01,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:01,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1237283624, now seen corresponding path program 1 times [2021-03-10 22:52:01,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:01,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846067527] [2021-03-10 22:52:01,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:01,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:01,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:01,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846067527] [2021-03-10 22:52:01,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:52:01,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 22:52:01,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989347377] [2021-03-10 22:52:01,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:52:01,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:01,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:52:01,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:52:02,000 INFO L87 Difference]: Start difference. First operand 1266 states and 4450 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:02,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:02,058 INFO L93 Difference]: Finished difference Result 1470 states and 4972 transitions. [2021-03-10 22:52:02,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 22:52:02,059 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:52:02,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:02,065 INFO L225 Difference]: With dead ends: 1470 [2021-03-10 22:52:02,065 INFO L226 Difference]: Without dead ends: 1307 [2021-03-10 22:52:02,065 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:52:02,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2021-03-10 22:52:02,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1247. [2021-03-10 22:52:02,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 3.4935794542536116) internal successors, (4353), 1246 states have internal predecessors, (4353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:02,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 4353 transitions. [2021-03-10 22:52:02,095 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 4353 transitions. Word has length 25 [2021-03-10 22:52:02,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:02,095 INFO L480 AbstractCegarLoop]: Abstraction has 1247 states and 4353 transitions. [2021-03-10 22:52:02,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:02,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 4353 transitions. [2021-03-10 22:52:02,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:52:02,099 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:02,099 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:02,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-10 22:52:02,099 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:02,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:02,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1327684600, now seen corresponding path program 2 times [2021-03-10 22:52:02,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:02,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987937772] [2021-03-10 22:52:02,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:02,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:02,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:02,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987937772] [2021-03-10 22:52:02,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:52:02,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 22:52:02,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547471884] [2021-03-10 22:52:02,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:52:02,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:02,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:52:02,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:52:02,153 INFO L87 Difference]: Start difference. First operand 1247 states and 4353 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:02,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:02,185 INFO L93 Difference]: Finished difference Result 1418 states and 4897 transitions. [2021-03-10 22:52:02,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:52:02,185 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:52:02,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:02,191 INFO L225 Difference]: With dead ends: 1418 [2021-03-10 22:52:02,191 INFO L226 Difference]: Without dead ends: 1418 [2021-03-10 22:52:02,191 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:52:02,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-03-10 22:52:02,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1232. [2021-03-10 22:52:02,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1231 states have (on average 3.505280259951259) internal successors, (4315), 1231 states have internal predecessors, (4315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:02,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 4315 transitions. [2021-03-10 22:52:02,216 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 4315 transitions. Word has length 25 [2021-03-10 22:52:02,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:02,216 INFO L480 AbstractCegarLoop]: Abstraction has 1232 states and 4315 transitions. [2021-03-10 22:52:02,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:02,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 4315 transitions. [2021-03-10 22:52:02,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:52:02,219 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:02,219 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:02,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-10 22:52:02,219 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:02,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:02,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1435620298, now seen corresponding path program 2 times [2021-03-10 22:52:02,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:02,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399116408] [2021-03-10 22:52:02,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:02,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399116408] [2021-03-10 22:52:02,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951813010] [2021-03-10 22:52:02,272 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) [2021-03-10 22:52:02,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:52:02,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:52:02,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-03-10 22:52:02,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:02,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:02,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:02,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-03-10 22:52:02,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73939595] [2021-03-10 22:52:02,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:52:02,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:02,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:52:02,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:52:02,374 INFO L87 Difference]: Start difference. First operand 1232 states and 4315 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-03-10 22:52:02,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:02,421 INFO L93 Difference]: Finished difference Result 1482 states and 5191 transitions. [2021-03-10 22:52:02,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 22:52:02,422 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) Word has length 25 [2021-03-10 22:52:02,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:02,428 INFO L225 Difference]: With dead ends: 1482 [2021-03-10 22:52:02,428 INFO L226 Difference]: Without dead ends: 1380 [2021-03-10 22:52:02,429 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:52:02,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2021-03-10 22:52:02,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1105. [2021-03-10 22:52:02,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1104 states have (on average 3.5543478260869565) internal successors, (3924), 1104 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:02,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 3924 transitions. [2021-03-10 22:52:02,458 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 3924 transitions. Word has length 25 [2021-03-10 22:52:02,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:02,458 INFO L480 AbstractCegarLoop]: Abstraction has 1105 states and 3924 transitions. [2021-03-10 22:52:02,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-03-10 22:52:02,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 3924 transitions. [2021-03-10 22:52:02,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 22:52:02,461 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:02,461 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:02,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:52:02,675 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:02,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:02,676 INFO L82 PathProgramCache]: Analyzing trace with hash 2103083480, now seen corresponding path program 1 times [2021-03-10 22:52:02,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:02,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344691635] [2021-03-10 22:52:02,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:02,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:02,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:02,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344691635] [2021-03-10 22:52:02,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097561539] [2021-03-10 22:52:02,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:52:02,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:02,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2021-03-10 22:52:02,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:02,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:52:02,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:02,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-03-10 22:52:02,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705042697] [2021-03-10 22:52:02,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:52:02,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:02,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:52:02,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:52:02,846 INFO L87 Difference]: Start difference. First operand 1105 states and 3924 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:02,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:02,912 INFO L93 Difference]: Finished difference Result 1282 states and 4578 transitions. [2021-03-10 22:52:02,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:52:02,912 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 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 [2021-03-10 22:52:02,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:02,918 INFO L225 Difference]: With dead ends: 1282 [2021-03-10 22:52:02,918 INFO L226 Difference]: Without dead ends: 1282 [2021-03-10 22:52:02,918 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:52:02,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-03-10 22:52:02,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1044. [2021-03-10 22:52:02,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 3.5618408437200384) internal successors, (3715), 1043 states have internal predecessors, (3715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:02,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 3715 transitions. [2021-03-10 22:52:02,939 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 3715 transitions. Word has length 27 [2021-03-10 22:52:02,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:02,939 INFO L480 AbstractCegarLoop]: Abstraction has 1044 states and 3715 transitions. [2021-03-10 22:52:02,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:02,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 3715 transitions. [2021-03-10 22:52:02,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:52:02,941 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:02,941 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:03,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-03-10 22:52:03,159 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:03,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:03,160 INFO L82 PathProgramCache]: Analyzing trace with hash -873778054, now seen corresponding path program 1 times [2021-03-10 22:52:03,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:03,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517251261] [2021-03-10 22:52:03,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:03,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:03,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:03,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517251261] [2021-03-10 22:52:03,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269843870] [2021-03-10 22:52:03,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-03-10 22:52:03,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:03,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:52:03,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:03,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 16 treesize of output 11 [2021-03-10 22:52:03,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:03,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:52:03,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:52:03,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:11 [2021-03-10 22:52:03,531 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 13 treesize of output 9 [2021-03-10 22:52:03,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:03,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:52:03,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:52:03,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-03-10 22:52:03,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:03,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:03,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-10 22:52:03,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862891770] [2021-03-10 22:52:03,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:52:03,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:03,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:52:03,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:52:03,557 INFO L87 Difference]: Start difference. First operand 1044 states and 3715 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-03-10 22:52:03,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:03,764 INFO L93 Difference]: Finished difference Result 2477 states and 8903 transitions. [2021-03-10 22:52:03,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:52:03,764 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) Word has length 29 [2021-03-10 22:52:03,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:03,772 INFO L225 Difference]: With dead ends: 2477 [2021-03-10 22:52:03,773 INFO L226 Difference]: Without dead ends: 1549 [2021-03-10 22:52:03,773 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 175.4ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:52:03,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1549 states. [2021-03-10 22:52:03,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1549 to 1288. [2021-03-10 22:52:03,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.5283605283605284) internal successors, (4541), 1287 states have internal predecessors, (4541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:03,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4541 transitions. [2021-03-10 22:52:03,807 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4541 transitions. Word has length 29 [2021-03-10 22:52:03,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:03,808 INFO L480 AbstractCegarLoop]: Abstraction has 1288 states and 4541 transitions. [2021-03-10 22:52:03,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-03-10 22:52:03,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4541 transitions. [2021-03-10 22:52:03,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:52:03,811 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:03,811 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:04,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:52:04,028 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:04,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:04,028 INFO L82 PathProgramCache]: Analyzing trace with hash -487573394, now seen corresponding path program 2 times [2021-03-10 22:52:04,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:04,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206751600] [2021-03-10 22:52:04,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:04,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:04,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206751600] [2021-03-10 22:52:04,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950974415] [2021-03-10 22:52:04,122 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 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 [2021-03-10 22:52:04,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:52:04,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:52:04,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:52:04,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:04,234 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 [2021-03-10 22:52:04,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:04,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:52:04,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:52:04,237 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-03-10 22:52:04,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:04,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:04,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:52:04,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61319116] [2021-03-10 22:52:04,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:52:04,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:04,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:52:04,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:52:04,278 INFO L87 Difference]: Start difference. First operand 1288 states and 4541 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:04,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:04,552 INFO L93 Difference]: Finished difference Result 3395 states and 12093 transitions. [2021-03-10 22:52:04,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:52:04,553 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 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 29 [2021-03-10 22:52:04,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:04,557 INFO L225 Difference]: With dead ends: 3395 [2021-03-10 22:52:04,558 INFO L226 Difference]: Without dead ends: 1756 [2021-03-10 22:52:04,558 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 179.6ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:52:04,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2021-03-10 22:52:04,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1019. [2021-03-10 22:52:04,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 3.486247544204322) internal successors, (3549), 1018 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:04,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 3549 transitions. [2021-03-10 22:52:04,599 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 3549 transitions. Word has length 29 [2021-03-10 22:52:04,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:04,599 INFO L480 AbstractCegarLoop]: Abstraction has 1019 states and 3549 transitions. [2021-03-10 22:52:04,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:04,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 3549 transitions. [2021-03-10 22:52:04,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:52:04,602 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:04,602 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:04,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-03-10 22:52:04,818 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:04,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:04,819 INFO L82 PathProgramCache]: Analyzing trace with hash -22453128, now seen corresponding path program 3 times [2021-03-10 22:52:04,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:04,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043190442] [2021-03-10 22:52:04,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:04,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:04,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:04,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043190442] [2021-03-10 22:52:04,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455225985] [2021-03-10 22:52:04,915 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 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 [2021-03-10 22:52:04,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:52:04,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:52:04,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:52:04,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:04,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 10 treesize of output 7 [2021-03-10 22:52:04,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:04,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:52:04,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:52:04,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:7 [2021-03-10 22:52:05,029 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 [2021-03-10 22:52:05,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:05,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:52:05,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:52:05,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-03-10 22:52:05,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:05,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:05,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-10 22:52:05,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497057735] [2021-03-10 22:52:05,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:52:05,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:05,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:52:05,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:52:05,047 INFO L87 Difference]: Start difference. First operand 1019 states and 3549 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:05,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:05,195 INFO L93 Difference]: Finished difference Result 2225 states and 7823 transitions. [2021-03-10 22:52:05,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:52:05,195 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 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 29 [2021-03-10 22:52:05,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:05,198 INFO L225 Difference]: With dead ends: 2225 [2021-03-10 22:52:05,198 INFO L226 Difference]: Without dead ends: 1056 [2021-03-10 22:52:05,199 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 122.5ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:52:05,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-03-10 22:52:05,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 730. [2021-03-10 22:52:05,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 3.486968449931413) internal successors, (2542), 729 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:05,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 2542 transitions. [2021-03-10 22:52:05,213 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 2542 transitions. Word has length 29 [2021-03-10 22:52:05,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:05,213 INFO L480 AbstractCegarLoop]: Abstraction has 730 states and 2542 transitions. [2021-03-10 22:52:05,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:05,213 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 2542 transitions. [2021-03-10 22:52:05,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:52:05,215 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:05,215 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:05,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:52:05,433 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:05,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:05,433 INFO L82 PathProgramCache]: Analyzing trace with hash 836346912, now seen corresponding path program 4 times [2021-03-10 22:52:05,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:05,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828383960] [2021-03-10 22:52:05,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:05,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:05,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:05,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828383960] [2021-03-10 22:52:05,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801152900] [2021-03-10 22:52:05,554 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:52:05,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:52:05,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:52:05,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:52:05,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:05,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 16 treesize of output 11 [2021-03-10 22:52:05,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:05,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:52:05,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:52:05,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:11 [2021-03-10 22:52:05,685 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 13 treesize of output 9 [2021-03-10 22:52:05,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:05,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:52:05,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:52:05,689 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-03-10 22:52:05,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:05,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:05,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 22:52:05,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082014051] [2021-03-10 22:52:05,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:52:05,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:05,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:52:05,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:52:05,708 INFO L87 Difference]: Start difference. First operand 730 states and 2542 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:05,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:05,837 INFO L93 Difference]: Finished difference Result 1734 states and 6084 transitions. [2021-03-10 22:52:05,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:52:05,837 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 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 29 [2021-03-10 22:52:05,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:05,839 INFO L225 Difference]: With dead ends: 1734 [2021-03-10 22:52:05,839 INFO L226 Difference]: Without dead ends: 812 [2021-03-10 22:52:05,839 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 106.6ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:52:05,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-03-10 22:52:05,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 764. [2021-03-10 22:52:05,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.4416775884665793) internal successors, (2626), 763 states have internal predecessors, (2626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:05,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2626 transitions. [2021-03-10 22:52:05,855 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2626 transitions. Word has length 29 [2021-03-10 22:52:05,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:05,855 INFO L480 AbstractCegarLoop]: Abstraction has 764 states and 2626 transitions. [2021-03-10 22:52:05,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:05,855 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2626 transitions. [2021-03-10 22:52:05,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 22:52:05,859 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:05,859 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:06,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-03-10 22:52:06,072 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:06,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:06,072 INFO L82 PathProgramCache]: Analyzing trace with hash 862166658, now seen corresponding path program 5 times [2021-03-10 22:52:06,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:06,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276245829] [2021-03-10 22:52:06,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:06,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:52:06,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276245829] [2021-03-10 22:52:06,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676759088] [2021-03-10 22:52:06,116 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 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 [2021-03-10 22:52:06,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:52:06,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:52:06,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 22:52:06,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:06,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:52:06,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:06,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 22:52:06,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454264427] [2021-03-10 22:52:06,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:52:06,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:06,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:52:06,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:52:06,209 INFO L87 Difference]: Start difference. First operand 764 states and 2626 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:06,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:06,283 INFO L93 Difference]: Finished difference Result 2158 states and 7467 transitions. [2021-03-10 22:52:06,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:52:06,284 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 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 31 [2021-03-10 22:52:06,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:06,289 INFO L225 Difference]: With dead ends: 2158 [2021-03-10 22:52:06,289 INFO L226 Difference]: Without dead ends: 2158 [2021-03-10 22:52:06,291 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:52:06,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2021-03-10 22:52:06,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 1150. [2021-03-10 22:52:06,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.6257615317667535) internal successors, (4166), 1149 states have internal predecessors, (4166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:06,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 4166 transitions. [2021-03-10 22:52:06,324 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 4166 transitions. Word has length 31 [2021-03-10 22:52:06,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:06,324 INFO L480 AbstractCegarLoop]: Abstraction has 1150 states and 4166 transitions. [2021-03-10 22:52:06,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:06,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 4166 transitions. [2021-03-10 22:52:06,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 22:52:06,327 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:06,327 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:06,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-03-10 22:52:06,547 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:06,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:06,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1214611312, now seen corresponding path program 6 times [2021-03-10 22:52:06,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:06,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965988772] [2021-03-10 22:52:06,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:06,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:06,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:52:06,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965988772] [2021-03-10 22:52:06,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124354907] [2021-03-10 22:52:06,587 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 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 [2021-03-10 22:52:06,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:52:06,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:52:06,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:52:06,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:06,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:52:06,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:06,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-03-10 22:52:06,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606568423] [2021-03-10 22:52:06,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:52:06,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:06,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:52:06,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:52:06,712 INFO L87 Difference]: Start difference. First operand 1150 states and 4166 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:07,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:07,132 INFO L93 Difference]: Finished difference Result 3097 states and 11097 transitions. [2021-03-10 22:52:07,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 22:52:07,132 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 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 31 [2021-03-10 22:52:07,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:07,140 INFO L225 Difference]: With dead ends: 3097 [2021-03-10 22:52:07,140 INFO L226 Difference]: Without dead ends: 3092 [2021-03-10 22:52:07,141 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 254.7ms TimeCoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:52:07,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3092 states. [2021-03-10 22:52:07,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3092 to 1871. [2021-03-10 22:52:07,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1870 states have (on average 3.8058823529411763) internal successors, (7117), 1870 states have internal predecessors, (7117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:07,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 7117 transitions. [2021-03-10 22:52:07,186 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 7117 transitions. Word has length 31 [2021-03-10 22:52:07,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:07,186 INFO L480 AbstractCegarLoop]: Abstraction has 1871 states and 7117 transitions. [2021-03-10 22:52:07,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:07,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 7117 transitions. [2021-03-10 22:52:07,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 22:52:07,189 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:07,190 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:07,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 22:52:07,403 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:07,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:07,404 INFO L82 PathProgramCache]: Analyzing trace with hash -373015140, now seen corresponding path program 7 times [2021-03-10 22:52:07,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:07,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525689702] [2021-03-10 22:52:07,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:07,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:07,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 22:52:07,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525689702] [2021-03-10 22:52:07,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971617518] [2021-03-10 22:52:07,438 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 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 [2021-03-10 22:52:07,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:07,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 22:52:07,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:07,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 22:52:07,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:07,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 22:52:07,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67042759] [2021-03-10 22:52:07,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:52:07,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:07,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:52:07,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:52:07,538 INFO L87 Difference]: Start difference. First operand 1871 states and 7117 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:07,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:07,614 INFO L93 Difference]: Finished difference Result 3521 states and 13072 transitions. [2021-03-10 22:52:07,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:52:07,615 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 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 33 [2021-03-10 22:52:07,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:07,625 INFO L225 Difference]: With dead ends: 3521 [2021-03-10 22:52:07,625 INFO L226 Difference]: Without dead ends: 3502 [2021-03-10 22:52:07,625 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:52:07,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3502 states. [2021-03-10 22:52:07,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3502 to 2458. [2021-03-10 22:52:07,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2458 states, 2457 states have (on average 3.938949938949939) internal successors, (9678), 2457 states have internal predecessors, (9678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:07,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2458 states to 2458 states and 9678 transitions. [2021-03-10 22:52:07,684 INFO L78 Accepts]: Start accepts. Automaton has 2458 states and 9678 transitions. Word has length 33 [2021-03-10 22:52:07,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:07,684 INFO L480 AbstractCegarLoop]: Abstraction has 2458 states and 9678 transitions. [2021-03-10 22:52:07,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:07,684 INFO L276 IsEmpty]: Start isEmpty. Operand 2458 states and 9678 transitions. [2021-03-10 22:52:07,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 22:52:07,689 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:07,689 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:07,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-10 22:52:07,907 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:07,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:07,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1066357152, now seen corresponding path program 8 times [2021-03-10 22:52:07,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:07,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555024813] [2021-03-10 22:52:07,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:07,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:07,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 22:52:07,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555024813] [2021-03-10 22:52:07,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017257601] [2021-03-10 22:52:07,939 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:52:07,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:52:07,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:52:07,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 22:52:07,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:08,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 22:52:08,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:08,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-03-10 22:52:08,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869973648] [2021-03-10 22:52:08,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:52:08,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:08,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:52:08,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:52:08,021 INFO L87 Difference]: Start difference. First operand 2458 states and 9678 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:08,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:08,084 INFO L93 Difference]: Finished difference Result 3425 states and 12799 transitions. [2021-03-10 22:52:08,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:52:08,085 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 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 33 [2021-03-10 22:52:08,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:08,102 INFO L225 Difference]: With dead ends: 3425 [2021-03-10 22:52:08,102 INFO L226 Difference]: Without dead ends: 3425 [2021-03-10 22:52:08,102 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:52:08,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3425 states. [2021-03-10 22:52:08,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3425 to 2506. [2021-03-10 22:52:08,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2506 states, 2505 states have (on average 3.9405189620758483) internal successors, (9871), 2505 states have internal predecessors, (9871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:08,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2506 states to 2506 states and 9871 transitions. [2021-03-10 22:52:08,164 INFO L78 Accepts]: Start accepts. Automaton has 2506 states and 9871 transitions. Word has length 33 [2021-03-10 22:52:08,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:08,164 INFO L480 AbstractCegarLoop]: Abstraction has 2506 states and 9871 transitions. [2021-03-10 22:52:08,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:08,164 INFO L276 IsEmpty]: Start isEmpty. Operand 2506 states and 9871 transitions. [2021-03-10 22:52:08,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 22:52:08,169 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:08,169 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:08,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:52:08,383 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:08,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:08,384 INFO L82 PathProgramCache]: Analyzing trace with hash -279862338, now seen corresponding path program 9 times [2021-03-10 22:52:08,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:08,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436714263] [2021-03-10 22:52:08,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:08,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:08,500 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:52:08,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436714263] [2021-03-10 22:52:08,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386054808] [2021-03-10 22:52:08,500 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 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 [2021-03-10 22:52:08,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:52:08,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:52:08,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 22:52:08,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:08,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 16 treesize of output 11 [2021-03-10 22:52:08,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:08,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:52:08,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:52:08,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-03-10 22:52:08,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:52:08,703 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 13 treesize of output 17 [2021-03-10 22:52:08,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:52:08,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:52:08,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:52:08,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:21 [2021-03-10 22:52:08,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:52:08,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:08,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-03-10 22:52:08,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351656003] [2021-03-10 22:52:08,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:52:08,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:08,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:52:08,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:52:08,787 INFO L87 Difference]: Start difference. First operand 2506 states and 9871 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:09,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:09,729 INFO L93 Difference]: Finished difference Result 9174 states and 34875 transitions. [2021-03-10 22:52:09,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 22:52:09,729 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 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 35 [2021-03-10 22:52:09,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:09,743 INFO L225 Difference]: With dead ends: 9174 [2021-03-10 22:52:09,744 INFO L226 Difference]: Without dead ends: 4789 [2021-03-10 22:52:09,744 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 654.6ms TimeCoverageRelationStatistics Valid=326, Invalid=1654, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 22:52:09,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4789 states. [2021-03-10 22:52:09,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4789 to 2599. [2021-03-10 22:52:09,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2599 states, 2598 states have (on average 3.8956889915319475) internal successors, (10121), 2598 states have internal predecessors, (10121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:09,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2599 states to 2599 states and 10121 transitions. [2021-03-10 22:52:09,851 INFO L78 Accepts]: Start accepts. Automaton has 2599 states and 10121 transitions. Word has length 35 [2021-03-10 22:52:09,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:09,852 INFO L480 AbstractCegarLoop]: Abstraction has 2599 states and 10121 transitions. [2021-03-10 22:52:09,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:09,852 INFO L276 IsEmpty]: Start isEmpty. Operand 2599 states and 10121 transitions. [2021-03-10 22:52:09,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 22:52:09,858 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:09,858 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:10,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:52:10,075 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:10,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:10,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1543863878, now seen corresponding path program 10 times [2021-03-10 22:52:10,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:10,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789567153] [2021-03-10 22:52:10,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:10,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:10,208 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:52:10,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789567153] [2021-03-10 22:52:10,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199052486] [2021-03-10 22:52:10,208 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 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 [2021-03-10 22:52:10,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:52:10,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:52:10,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 22:52:10,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:10,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 16 treesize of output 11 [2021-03-10 22:52:10,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:10,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:52:10,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:52:10,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-03-10 22:52:10,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:52:10,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2021-03-10 22:52:10,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:10,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:52:10,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:52:10,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:11 [2021-03-10 22:52:10,440 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:52:10,441 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 18 treesize of output 20 [2021-03-10 22:52:10,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:52:10,456 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 22:52:10,456 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 20 treesize of output 12 [2021-03-10 22:52:10,458 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:10,462 INFO L628 ElimStorePlain]: treesize reduction 16, result has 23.8 percent of original size [2021-03-10 22:52:10,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:52:10,463 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:39, output treesize:5 [2021-03-10 22:52:10,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:52:10,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:10,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 12 [2021-03-10 22:52:10,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119083756] [2021-03-10 22:52:10,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:52:10,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:10,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:52:10,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:52:10,477 INFO L87 Difference]: Start difference. First operand 2599 states and 10121 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:10,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:10,684 INFO L93 Difference]: Finished difference Result 6287 states and 24420 transitions. [2021-03-10 22:52:10,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:52:10,685 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 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 35 [2021-03-10 22:52:10,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:10,690 INFO L225 Difference]: With dead ends: 6287 [2021-03-10 22:52:10,690 INFO L226 Difference]: Without dead ends: 1914 [2021-03-10 22:52:10,691 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 188.1ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:52:10,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1914 states. [2021-03-10 22:52:10,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1914 to 1914. [2021-03-10 22:52:10,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 3.776790381599582) internal successors, (7225), 1913 states have internal predecessors, (7225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:10,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 7225 transitions. [2021-03-10 22:52:10,723 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 7225 transitions. Word has length 35 [2021-03-10 22:52:10,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:10,723 INFO L480 AbstractCegarLoop]: Abstraction has 1914 states and 7225 transitions. [2021-03-10 22:52:10,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:10,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 7225 transitions. [2021-03-10 22:52:10,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-10 22:52:10,727 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:10,727 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:10,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-03-10 22:52:10,943 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:10,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:10,943 INFO L82 PathProgramCache]: Analyzing trace with hash 723068398, now seen corresponding path program 11 times [2021-03-10 22:52:10,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:10,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421343989] [2021-03-10 22:52:10,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:10,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:10,985 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 22:52:10,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421343989] [2021-03-10 22:52:10,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836930234] [2021-03-10 22:52:10,986 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 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 [2021-03-10 22:52:11,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:52:11,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:52:11,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 22:52:11,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:11,075 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 22:52:11,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:11,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 22:52:11,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027590516] [2021-03-10 22:52:11,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:52:11,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:11,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:52:11,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:52:11,077 INFO L87 Difference]: Start difference. First operand 1914 states and 7225 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:11,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:11,176 INFO L93 Difference]: Finished difference Result 4359 states and 15987 transitions. [2021-03-10 22:52:11,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:52:11,177 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 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 37 [2021-03-10 22:52:11,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:11,185 INFO L225 Difference]: With dead ends: 4359 [2021-03-10 22:52:11,186 INFO L226 Difference]: Without dead ends: 4324 [2021-03-10 22:52:11,186 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:52:11,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4324 states. [2021-03-10 22:52:11,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4324 to 2685. [2021-03-10 22:52:11,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2685 states, 2684 states have (on average 3.9657228017883757) internal successors, (10644), 2684 states have internal predecessors, (10644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:11,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2685 states to 2685 states and 10644 transitions. [2021-03-10 22:52:11,261 INFO L78 Accepts]: Start accepts. Automaton has 2685 states and 10644 transitions. Word has length 37 [2021-03-10 22:52:11,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:11,261 INFO L480 AbstractCegarLoop]: Abstraction has 2685 states and 10644 transitions. [2021-03-10 22:52:11,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:11,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2685 states and 10644 transitions. [2021-03-10 22:52:11,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-10 22:52:11,267 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:11,267 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:11,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:52:11,482 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:11,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:11,483 INFO L82 PathProgramCache]: Analyzing trace with hash -254441462, now seen corresponding path program 12 times [2021-03-10 22:52:11,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:11,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555876448] [2021-03-10 22:52:11,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:11,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:11,508 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 22:52:11,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555876448] [2021-03-10 22:52:11,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222184795] [2021-03-10 22:52:11,509 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 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 [2021-03-10 22:52:11,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:52:11,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:52:11,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 22:52:11,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:11,599 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 22:52:11,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:11,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 22:52:11,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157978497] [2021-03-10 22:52:11,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:52:11,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:11,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:52:11,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:52:11,600 INFO L87 Difference]: Start difference. First operand 2685 states and 10644 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:11,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:11,683 INFO L93 Difference]: Finished difference Result 4302 states and 15942 transitions. [2021-03-10 22:52:11,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:52:11,683 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 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 37 [2021-03-10 22:52:11,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:11,693 INFO L225 Difference]: With dead ends: 4302 [2021-03-10 22:52:11,694 INFO L226 Difference]: Without dead ends: 4302 [2021-03-10 22:52:11,695 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:52:11,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4302 states. [2021-03-10 22:52:11,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4302 to 2771. [2021-03-10 22:52:11,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2771 states, 2770 states have (on average 3.9624548736462093) internal successors, (10976), 2770 states have internal predecessors, (10976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:11,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2771 states to 2771 states and 10976 transitions. [2021-03-10 22:52:11,763 INFO L78 Accepts]: Start accepts. Automaton has 2771 states and 10976 transitions. Word has length 37 [2021-03-10 22:52:11,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:11,764 INFO L480 AbstractCegarLoop]: Abstraction has 2771 states and 10976 transitions. [2021-03-10 22:52:11,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:11,764 INFO L276 IsEmpty]: Start isEmpty. Operand 2771 states and 10976 transitions. [2021-03-10 22:52:11,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 22:52:11,770 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:11,770 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:11,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-03-10 22:52:11,989 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:11,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:11,989 INFO L82 PathProgramCache]: Analyzing trace with hash -79870718, now seen corresponding path program 13 times [2021-03-10 22:52:11,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:11,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456357437] [2021-03-10 22:52:11,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:11,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:12,028 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 22:52:12,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456357437] [2021-03-10 22:52:12,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016714967] [2021-03-10 22:52:12,029 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 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 [2021-03-10 22:52:12,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:12,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:52:12,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:12,127 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 22:52:12,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:12,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 22:52:12,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497135733] [2021-03-10 22:52:12,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:52:12,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:12,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:52:12,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:52:12,128 INFO L87 Difference]: Start difference. First operand 2771 states and 10976 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:12,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:12,285 INFO L93 Difference]: Finished difference Result 10727 states and 42002 transitions. [2021-03-10 22:52:12,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:52:12,285 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 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 39 [2021-03-10 22:52:12,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:12,314 INFO L225 Difference]: With dead ends: 10727 [2021-03-10 22:52:12,314 INFO L226 Difference]: Without dead ends: 10727 [2021-03-10 22:52:12,315 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:52:12,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10727 states. [2021-03-10 22:52:12,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10727 to 5153. [2021-03-10 22:52:12,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5153 states, 5152 states have (on average 4.186141304347826) internal successors, (21567), 5152 states have internal predecessors, (21567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:12,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5153 states to 5153 states and 21567 transitions. [2021-03-10 22:52:12,540 INFO L78 Accepts]: Start accepts. Automaton has 5153 states and 21567 transitions. Word has length 39 [2021-03-10 22:52:12,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:12,540 INFO L480 AbstractCegarLoop]: Abstraction has 5153 states and 21567 transitions. [2021-03-10 22:52:12,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:12,540 INFO L276 IsEmpty]: Start isEmpty. Operand 5153 states and 21567 transitions. [2021-03-10 22:52:12,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 22:52:12,552 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:12,552 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:12,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:52:12,765 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:12,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:12,765 INFO L82 PathProgramCache]: Analyzing trace with hash -453153580, now seen corresponding path program 14 times [2021-03-10 22:52:12,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:12,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837491282] [2021-03-10 22:52:12,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:12,792 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 22:52:12,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837491282] [2021-03-10 22:52:12,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134574650] [2021-03-10 22:52:12,793 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 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 [2021-03-10 22:52:12,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:52:12,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:52:12,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 22:52:12,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 22:52:12,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:12,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 22:52:12,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398875076] [2021-03-10 22:52:12,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:52:12,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:12,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:52:12,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:52:12,907 INFO L87 Difference]: Start difference. First operand 5153 states and 21567 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:13,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:13,151 INFO L93 Difference]: Finished difference Result 10041 states and 38746 transitions. [2021-03-10 22:52:13,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:52:13,152 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 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 39 [2021-03-10 22:52:13,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:13,176 INFO L225 Difference]: With dead ends: 10041 [2021-03-10 22:52:13,177 INFO L226 Difference]: Without dead ends: 10041 [2021-03-10 22:52:13,177 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:52:13,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10041 states. [2021-03-10 22:52:13,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10041 to 4441. [2021-03-10 22:52:13,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4441 states, 4440 states have (on average 4.065990990990991) internal successors, (18053), 4440 states have internal predecessors, (18053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:13,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4441 states to 4441 states and 18053 transitions. [2021-03-10 22:52:13,312 INFO L78 Accepts]: Start accepts. Automaton has 4441 states and 18053 transitions. Word has length 39 [2021-03-10 22:52:13,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:13,312 INFO L480 AbstractCegarLoop]: Abstraction has 4441 states and 18053 transitions. [2021-03-10 22:52:13,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:13,312 INFO L276 IsEmpty]: Start isEmpty. Operand 4441 states and 18053 transitions. [2021-03-10 22:52:13,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 22:52:13,322 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:13,322 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:13,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-03-10 22:52:13,535 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:13,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:13,535 INFO L82 PathProgramCache]: Analyzing trace with hash 896498000, now seen corresponding path program 15 times [2021-03-10 22:52:13,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:13,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603781745] [2021-03-10 22:52:13,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:13,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:13,592 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 22:52:13,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603781745] [2021-03-10 22:52:13,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887421716] [2021-03-10 22:52:13,592 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 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 [2021-03-10 22:52:13,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:52:13,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:52:13,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:52:13,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-03-10 22:52:13,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:13,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-03-10 22:52:13,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985954659] [2021-03-10 22:52:13,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:52:13,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:13,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:52:13,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:52:13,692 INFO L87 Difference]: Start difference. First operand 4441 states and 18053 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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) [2021-03-10 22:52:13,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:13,939 INFO L93 Difference]: Finished difference Result 11620 states and 45946 transitions. [2021-03-10 22:52:13,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:52:13,940 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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) Word has length 39 [2021-03-10 22:52:13,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:13,968 INFO L225 Difference]: With dead ends: 11620 [2021-03-10 22:52:13,968 INFO L226 Difference]: Without dead ends: 11620 [2021-03-10 22:52:13,968 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 122.7ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:52:13,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11620 states. [2021-03-10 22:52:14,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11620 to 5511. [2021-03-10 22:52:14,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5511 states, 5510 states have (on average 4.122141560798548) internal successors, (22713), 5510 states have internal predecessors, (22713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:14,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5511 states to 5511 states and 22713 transitions. [2021-03-10 22:52:14,134 INFO L78 Accepts]: Start accepts. Automaton has 5511 states and 22713 transitions. Word has length 39 [2021-03-10 22:52:14,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:14,135 INFO L480 AbstractCegarLoop]: Abstraction has 5511 states and 22713 transitions. [2021-03-10 22:52:14,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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) [2021-03-10 22:52:14,135 INFO L276 IsEmpty]: Start isEmpty. Operand 5511 states and 22713 transitions. [2021-03-10 22:52:14,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 22:52:14,147 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:14,147 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:14,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-03-10 22:52:14,365 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:14,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:14,365 INFO L82 PathProgramCache]: Analyzing trace with hash -87015442, now seen corresponding path program 16 times [2021-03-10 22:52:14,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:14,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036240814] [2021-03-10 22:52:14,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:14,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:14,518 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-03-10 22:52:14,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036240814] [2021-03-10 22:52:14,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634211704] [2021-03-10 22:52:14,519 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:52:14,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:52:14,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:52:14,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 22:52:14,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:14,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 10 treesize of output 7 [2021-03-10 22:52:14,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:14,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:52:14,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:52:14,574 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:10 [2021-03-10 22:52:14,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:52:14,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2021-03-10 22:52:14,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:14,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:52:14,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:52:14,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:12 [2021-03-10 22:52:14,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:52:14,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2021-03-10 22:52:14,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:14,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:52:14,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:52:14,695 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:9 [2021-03-10 22:52:14,765 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:52:14,765 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 16 treesize of output 18 [2021-03-10 22:52:14,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:52:14,774 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-10 22:52:14,774 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 18 treesize of output 10 [2021-03-10 22:52:14,775 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:52:14,780 INFO L628 ElimStorePlain]: treesize reduction 12, result has 20.0 percent of original size [2021-03-10 22:52:14,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:52:14,781 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:35, output treesize:3 [2021-03-10 22:52:14,793 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:52:14,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:14,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 14 [2021-03-10 22:52:14,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126504026] [2021-03-10 22:52:14,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:52:14,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:14,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:52:14,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:52:14,794 INFO L87 Difference]: Start difference. First operand 5511 states and 22713 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:15,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:15,080 INFO L93 Difference]: Finished difference Result 9699 states and 39594 transitions. [2021-03-10 22:52:15,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:52:15,080 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 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 41 [2021-03-10 22:52:15,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:15,081 INFO L225 Difference]: With dead ends: 9699 [2021-03-10 22:52:15,081 INFO L226 Difference]: Without dead ends: 0 [2021-03-10 22:52:15,081 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 220.7ms TimeCoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:52:15,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-03-10 22:52:15,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-03-10 22:52:15,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:15,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-03-10 22:52:15,081 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2021-03-10 22:52:15,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:15,082 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-03-10 22:52:15,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:15,082 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-03-10 22:52:15,082 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-03-10 22:52:15,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-10 22:52:15,286 INFO L202 PluginConnector]: Adding new model min-max-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 10:52:15 BasicIcfg [2021-03-10 22:52:15,286 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 22:52:15,286 INFO L168 Benchmark]: Toolchain (without parser) took 15380.29 ms. Allocated memory was 255.9 MB in the beginning and 648.0 MB in the end (delta: 392.2 MB). Free memory was 236.7 MB in the beginning and 535.1 MB in the end (delta: -298.4 MB). Peak memory consumption was 93.1 MB. Max. memory is 16.0 GB. [2021-03-10 22:52:15,286 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 22:52:15,286 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.93 ms. Allocated memory is still 255.9 MB. Free memory was 236.2 MB in the beginning and 234.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 22:52:15,286 INFO L168 Benchmark]: Boogie Preprocessor took 26.07 ms. Allocated memory is still 255.9 MB. Free memory was 234.7 MB in the beginning and 233.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-03-10 22:52:15,286 INFO L168 Benchmark]: RCFGBuilder took 229.34 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 235.9 MB in the end (delta: -2.3 MB). Peak memory consumption was 17.5 MB. Max. memory is 16.0 GB. [2021-03-10 22:52:15,286 INFO L168 Benchmark]: TraceAbstraction took 15093.85 ms. Allocated memory was 255.9 MB in the beginning and 648.0 MB in the end (delta: 392.2 MB). Free memory was 235.2 MB in the beginning and 535.1 MB in the end (delta: -299.9 MB). Peak memory consumption was 92.3 MB. Max. memory is 16.0 GB. [2021-03-10 22:52:15,287 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 0.10 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.93 ms. Allocated memory is still 255.9 MB. Free memory was 236.2 MB in the beginning and 234.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 26.07 ms. Allocated memory is still 255.9 MB. Free memory was 234.7 MB in the beginning and 233.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 229.34 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 235.9 MB in the end (delta: -2.3 MB). Peak memory consumption was 17.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 15093.85 ms. Allocated memory was 255.9 MB in the beginning and 648.0 MB in the end (delta: 392.2 MB). Free memory was 235.2 MB in the beginning and 535.1 MB in the end (delta: -299.9 MB). Peak memory consumption was 92.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 77]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 15023.7ms, OverallIterations: 26, TraceHistogramMax: 4, EmptinessCheckTime: 128.3ms, AutomataDifference: 4605.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 107.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1282 SDtfs, 3600 SDslu, 5206 SDs, 0 SdLazy, 3261 SolverSat, 474 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1624.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 920 GetRequests, 583 SyntacticMatches, 24 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 2601.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=5511occurred in iteration=25, InterpolantAutomatonStates: 301, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1448.7ms AutomataMinimizationTime, 26 MinimizatonAttempts, 32102 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 140.7ms SsaConstructionTime, 481.0ms SatisfiabilityAnalysisTime, 3405.4ms InterpolantComputationTime, 1413 NumberOfCodeBlocks, 1409 NumberOfCodeBlocksAsserted, 71 NumberOfCheckSat, 1368 ConstructedInterpolants, 0 QuantifiedInterpolants, 6382 SizeOfPredicates, 38 NumberOfNonLiveVariables, 1729 ConjunctsInSsa, 182 ConjunctsInUnsatCore, 45 InterpolantComputations, 7 PerfectInterpolantSequences, 201/405 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 proved your program to be correct! Received shutdown request...