/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/bench/exp2x4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 20:38:56,214 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 20:38:56,215 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 20:38:56,239 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 20:38:56,272 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 [2021-05-21 20:38:56,307 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 20:38:56,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 20:38:56,308 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 20:38:56,309 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 20:38:56,311 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 20:38:56,311 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 20:38:56,311 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 20:38:56,312 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 20:38:56,312 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 20:38:56,312 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 20:38:56,313 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 20:38:56,313 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 20:38:56,313 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 20:38:56,313 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 20:38:56,313 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 20:38:56,313 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 20:38:56,313 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 20:38:56,314 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 20:38:56,314 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 20:38:56,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 20:38:56,314 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 20:38:56,314 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 20:38:56,314 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 20:38:56,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 20:38:56,315 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 20:38:56,315 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 20:38:56,315 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 20:38:56,315 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 20:38:56,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 20:38:56,315 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 20:38:56,315 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 20:38:56,315 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 20:38:56,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 20:38:56,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 20:38:56,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 20:38:56,630 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-21 20:38:56,631 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-21 20:38:56,632 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x4.wvr.bpl [2021-05-21 20:38:56,633 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x4.wvr.bpl' [2021-05-21 20:38:56,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 20:38:56,673 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-21 20:38:56,675 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 20:38:56,676 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 20:38:56,676 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 20:38:56,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:38:56" (1/1) ... [2021-05-21 20:38:56,694 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:38:56" (1/1) ... [2021-05-21 20:38:56,703 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 20:38:56,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 20:38:56,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 20:38:56,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 20:38:56,711 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:38:56" (1/1) ... [2021-05-21 20:38:56,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:38:56" (1/1) ... [2021-05-21 20:38:56,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:38:56" (1/1) ... [2021-05-21 20:38:56,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:38:56" (1/1) ... [2021-05-21 20:38:56,715 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:38:56" (1/1) ... [2021-05-21 20:38:56,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:38:56" (1/1) ... [2021-05-21 20:38:56,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:38:56" (1/1) ... [2021-05-21 20:38:56,719 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 20:38:56,720 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 20:38:56,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 20:38:56,721 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 20:38:56,722 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:38:56" (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 [2021-05-21 20:38:56,787 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-21 20:38:56,788 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-21 20:38:56,788 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-21 20:38:56,788 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-21 20:38:56,789 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-21 20:38:56,789 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-21 20:38:56,789 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-21 20:38:56,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 20:38:56,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 20:38:56,789 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-21 20:38:56,789 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-21 20:38:56,791 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-21 20:38:56,791 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-05-21 20:38:56,791 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-05-21 20:38:56,791 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-05-21 20:38:56,792 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 20:38:56,955 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 20:38:56,955 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-21 20:38:56,957 INFO L202 PluginConnector]: Adding new model exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 08:38:56 BoogieIcfgContainer [2021-05-21 20:38:56,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 20:38:56,958 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 20:38:56,958 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 20:38:56,961 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 20:38:56,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:38:56" (1/2) ... [2021-05-21 20:38:56,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a064b75 and model type exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 08:38:56, skipping insertion in model container [2021-05-21 20:38:56,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 08:38:56" (2/2) ... [2021-05-21 20:38:56,964 INFO L111 eAbstractionObserver]: Analyzing ICFG exp2x4.wvr.bpl [2021-05-21 20:38:56,968 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 20:38:56,969 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 20:38:56,969 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 20:38:56,969 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 20:38:57,012 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-05-21 20:38:57,031 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-05-21 20:38:57,055 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 20:38:57,055 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 20:38:57,055 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 20:38:57,055 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 20:38:57,055 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 20:38:57,055 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 20:38:57,056 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 20:38:57,056 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 20:38:57,064 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 37 transitions, 106 flow [2021-05-21 20:38:57,252 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 942 states, 940 states have (on average 3.9117021276595745) internal successors, (3677), 941 states have internal predecessors, (3677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:57,261 INFO L276 IsEmpty]: Start isEmpty. Operand has 942 states, 940 states have (on average 3.9117021276595745) internal successors, (3677), 941 states have internal predecessors, (3677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:57,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:38:57,279 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:57,280 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:57,280 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:57,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:57,285 INFO L82 PathProgramCache]: Analyzing trace with hash 500910984, now seen corresponding path program 1 times [2021-05-21 20:38:57,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:57,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917873406] [2021-05-21 20:38:57,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:57,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:57,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:57,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:57,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917873406] [2021-05-21 20:38:57,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917873406] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:38:57,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:38:57,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-21 20:38:57,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079318984] [2021-05-21 20:38:57,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-21 20:38:57,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:57,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-21 20:38:57,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 20:38:57,457 INFO L87 Difference]: Start difference. First operand has 942 states, 940 states have (on average 3.9117021276595745) internal successors, (3677), 941 states have internal predecessors, (3677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:57,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:57,607 INFO L93 Difference]: Finished difference Result 1365 states and 5324 transitions. [2021-05-21 20:38:57,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-21 20:38:57,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-21 20:38:57,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:57,654 INFO L225 Difference]: With dead ends: 1365 [2021-05-21 20:38:57,654 INFO L226 Difference]: Without dead ends: 1334 [2021-05-21 20:38:57,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 20:38:57,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2021-05-21 20:38:57,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 1069. [2021-05-21 20:38:57,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 3.903558052434457) internal successors, (4169), 1068 states have internal predecessors, (4169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:57,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 4169 transitions. [2021-05-21 20:38:57,811 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 4169 transitions. Word has length 19 [2021-05-21 20:38:57,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:57,815 INFO L482 AbstractCegarLoop]: Abstraction has 1069 states and 4169 transitions. [2021-05-21 20:38:57,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:57,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 4169 transitions. [2021-05-21 20:38:57,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-21 20:38:57,819 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:57,819 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:57,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 20:38:57,820 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:57,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:57,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1942329299, now seen corresponding path program 1 times [2021-05-21 20:38:57,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:57,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468501792] [2021-05-21 20:38:57,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:57,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:57,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:57,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:57,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468501792] [2021-05-21 20:38:57,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468501792] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:57,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351641041] [2021-05-21 20:38:57,884 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 [2021-05-21 20:38:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:57,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-21 20:38:57,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:58,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351641041] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:58,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:58,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-05-21 20:38:58,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861225447] [2021-05-21 20:38:58,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 20:38:58,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:58,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 20:38:58,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:38:58,008 INFO L87 Difference]: Start difference. First operand 1069 states and 4169 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:58,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:58,100 INFO L93 Difference]: Finished difference Result 2313 states and 8847 transitions. [2021-05-21 20:38:58,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:38:58,101 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-21 20:38:58,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:58,118 INFO L225 Difference]: With dead ends: 2313 [2021-05-21 20:38:58,118 INFO L226 Difference]: Without dead ends: 2313 [2021-05-21 20:38:58,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:38:58,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2021-05-21 20:38:58,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 1246. [2021-05-21 20:38:58,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.9710843373493976) internal successors, (4944), 1245 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:58,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4944 transitions. [2021-05-21 20:38:58,201 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4944 transitions. Word has length 22 [2021-05-21 20:38:58,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:58,202 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 4944 transitions. [2021-05-21 20:38:58,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:58,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4944 transitions. [2021-05-21 20:38:58,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-21 20:38:58,207 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:58,207 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:58,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-21 20:38:58,432 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:58,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:58,432 INFO L82 PathProgramCache]: Analyzing trace with hash -977644340, now seen corresponding path program 1 times [2021-05-21 20:38:58,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:58,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643779411] [2021-05-21 20:38:58,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:58,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:58,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:58,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:58,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643779411] [2021-05-21 20:38:58,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643779411] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:58,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7760096] [2021-05-21 20:38:58,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:58,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-21 20:38:58,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:58,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:58,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7760096] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:58,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:58,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-05-21 20:38:58,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11139765] [2021-05-21 20:38:58,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 20:38:58,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:58,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 20:38:58,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:38:58,626 INFO L87 Difference]: Start difference. First operand 1246 states and 4944 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:58,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:58,708 INFO L93 Difference]: Finished difference Result 2518 states and 9792 transitions. [2021-05-21 20:38:58,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:38:58,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-21 20:38:58,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:58,726 INFO L225 Difference]: With dead ends: 2518 [2021-05-21 20:38:58,726 INFO L226 Difference]: Without dead ends: 2518 [2021-05-21 20:38:58,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:38:58,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2021-05-21 20:38:58,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 1535. [2021-05-21 20:38:58,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 4.046284224250326) internal successors, (6207), 1534 states have internal predecessors, (6207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:58,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 6207 transitions. [2021-05-21 20:38:58,799 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 6207 transitions. Word has length 22 [2021-05-21 20:38:58,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:58,799 INFO L482 AbstractCegarLoop]: Abstraction has 1535 states and 6207 transitions. [2021-05-21 20:38:58,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:58,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 6207 transitions. [2021-05-21 20:38:58,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-21 20:38:58,807 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:58,807 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:59,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:59,025 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:59,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:59,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1634054805, now seen corresponding path program 1 times [2021-05-21 20:38:59,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:59,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214469436] [2021-05-21 20:38:59,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:59,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:59,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:59,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:59,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214469436] [2021-05-21 20:38:59,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214469436] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:38:59,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:38:59,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 20:38:59,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645637548] [2021-05-21 20:38:59,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 20:38:59,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:59,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 20:38:59,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:38:59,075 INFO L87 Difference]: Start difference. First operand 1535 states and 6207 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:59,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:59,144 INFO L93 Difference]: Finished difference Result 2143 states and 8381 transitions. [2021-05-21 20:38:59,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:38:59,145 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-21 20:38:59,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:59,158 INFO L225 Difference]: With dead ends: 2143 [2021-05-21 20:38:59,159 INFO L226 Difference]: Without dead ends: 2120 [2021-05-21 20:38:59,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:38:59,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2021-05-21 20:38:59,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 1600. [2021-05-21 20:38:59,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 3.9987492182614135) internal successors, (6394), 1599 states have internal predecessors, (6394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:59,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 6394 transitions. [2021-05-21 20:38:59,217 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 6394 transitions. Word has length 22 [2021-05-21 20:38:59,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:59,217 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 6394 transitions. [2021-05-21 20:38:59,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:59,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 6394 transitions. [2021-05-21 20:38:59,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-21 20:38:59,222 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:59,223 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:59,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-21 20:38:59,224 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:59,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:59,224 INFO L82 PathProgramCache]: Analyzing trace with hash 2015216124, now seen corresponding path program 1 times [2021-05-21 20:38:59,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:59,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871821738] [2021-05-21 20:38:59,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:59,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:59,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:59,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871821738] [2021-05-21 20:38:59,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871821738] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:38:59,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:38:59,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 20:38:59,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589023971] [2021-05-21 20:38:59,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 20:38:59,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:59,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 20:38:59,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:38:59,274 INFO L87 Difference]: Start difference. First operand 1600 states and 6394 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:59,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:59,339 INFO L93 Difference]: Finished difference Result 2353 states and 9126 transitions. [2021-05-21 20:38:59,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:38:59,340 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-21 20:38:59,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:59,355 INFO L225 Difference]: With dead ends: 2353 [2021-05-21 20:38:59,356 INFO L226 Difference]: Without dead ends: 2337 [2021-05-21 20:38:59,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:38:59,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2021-05-21 20:38:59,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 1670. [2021-05-21 20:38:59,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 3.9622528460155784) internal successors, (6613), 1669 states have internal predecessors, (6613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:59,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 6613 transitions. [2021-05-21 20:38:59,464 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 6613 transitions. Word has length 22 [2021-05-21 20:38:59,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:59,464 INFO L482 AbstractCegarLoop]: Abstraction has 1670 states and 6613 transitions. [2021-05-21 20:38:59,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:59,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 6613 transitions. [2021-05-21 20:38:59,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-21 20:38:59,469 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:59,469 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:59,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-21 20:38:59,470 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:59,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:59,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1699108399, now seen corresponding path program 2 times [2021-05-21 20:38:59,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:59,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708001005] [2021-05-21 20:38:59,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:59,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:59,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:59,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:59,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708001005] [2021-05-21 20:38:59,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708001005] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:38:59,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:38:59,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 20:38:59,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391570868] [2021-05-21 20:38:59,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 20:38:59,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:59,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 20:38:59,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:38:59,509 INFO L87 Difference]: Start difference. First operand 1670 states and 6613 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:59,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:59,582 INFO L93 Difference]: Finished difference Result 2314 states and 9023 transitions. [2021-05-21 20:38:59,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:38:59,582 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-21 20:38:59,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:59,611 INFO L225 Difference]: With dead ends: 2314 [2021-05-21 20:38:59,611 INFO L226 Difference]: Without dead ends: 2314 [2021-05-21 20:38:59,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:38:59,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-05-21 20:38:59,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1847. [2021-05-21 20:38:59,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1847 states, 1846 states have (on average 3.978331527627302) internal successors, (7344), 1846 states have internal predecessors, (7344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:59,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 7344 transitions. [2021-05-21 20:38:59,672 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 7344 transitions. Word has length 22 [2021-05-21 20:38:59,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:59,672 INFO L482 AbstractCegarLoop]: Abstraction has 1847 states and 7344 transitions. [2021-05-21 20:38:59,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:59,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 7344 transitions. [2021-05-21 20:38:59,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-21 20:38:59,677 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:59,678 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:59,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-21 20:38:59,678 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:59,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:59,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1727272710, now seen corresponding path program 2 times [2021-05-21 20:38:59,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:59,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889390568] [2021-05-21 20:38:59,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:59,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:59,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:59,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:59,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889390568] [2021-05-21 20:38:59,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889390568] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:38:59,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:38:59,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 20:38:59,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747490794] [2021-05-21 20:38:59,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 20:38:59,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:59,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 20:38:59,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:38:59,734 INFO L87 Difference]: Start difference. First operand 1847 states and 7344 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:59,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:59,795 INFO L93 Difference]: Finished difference Result 2315 states and 8927 transitions. [2021-05-21 20:38:59,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:38:59,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-21 20:38:59,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:59,804 INFO L225 Difference]: With dead ends: 2315 [2021-05-21 20:38:59,805 INFO L226 Difference]: Without dead ends: 2297 [2021-05-21 20:38:59,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:38:59,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2021-05-21 20:38:59,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 1919. [2021-05-21 20:38:59,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1918 states have (on average 3.946298227320125) internal successors, (7569), 1918 states have internal predecessors, (7569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:59,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 7569 transitions. [2021-05-21 20:38:59,880 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 7569 transitions. Word has length 22 [2021-05-21 20:38:59,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:59,881 INFO L482 AbstractCegarLoop]: Abstraction has 1919 states and 7569 transitions. [2021-05-21 20:38:59,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:59,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 7569 transitions. [2021-05-21 20:38:59,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-21 20:38:59,887 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:59,887 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:59,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-21 20:38:59,888 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:59,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:59,888 INFO L82 PathProgramCache]: Analyzing trace with hash -264076448, now seen corresponding path program 2 times [2021-05-21 20:38:59,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:59,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656647354] [2021-05-21 20:38:59,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:59,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:59,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:59,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:59,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656647354] [2021-05-21 20:38:59,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656647354] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:38:59,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:38:59,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 20:38:59,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929504563] [2021-05-21 20:38:59,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 20:38:59,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:59,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 20:38:59,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:38:59,922 INFO L87 Difference]: Start difference. First operand 1919 states and 7569 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:59,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:59,983 INFO L93 Difference]: Finished difference Result 2879 states and 11172 transitions. [2021-05-21 20:38:59,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:38:59,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-21 20:38:59,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:59,994 INFO L225 Difference]: With dead ends: 2879 [2021-05-21 20:38:59,994 INFO L226 Difference]: Without dead ends: 2879 [2021-05-21 20:38:59,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:39:00,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2879 states. [2021-05-21 20:39:00,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2879 to 2176. [2021-05-21 20:39:00,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.964137931034483) internal successors, (8622), 2175 states have internal predecessors, (8622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:00,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 8622 transitions. [2021-05-21 20:39:00,091 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 8622 transitions. Word has length 22 [2021-05-21 20:39:00,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:00,092 INFO L482 AbstractCegarLoop]: Abstraction has 2176 states and 8622 transitions. [2021-05-21 20:39:00,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:00,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 8622 transitions. [2021-05-21 20:39:00,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-21 20:39:00,099 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:00,099 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:00,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-21 20:39:00,099 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:00,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:00,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1299303677, now seen corresponding path program 2 times [2021-05-21 20:39:00,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:00,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317999444] [2021-05-21 20:39:00,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:00,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:00,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:00,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:00,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317999444] [2021-05-21 20:39:00,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317999444] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:39:00,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:39:00,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 20:39:00,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103438766] [2021-05-21 20:39:00,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 20:39:00,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:00,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 20:39:00,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:39:00,142 INFO L87 Difference]: Start difference. First operand 2176 states and 8622 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:00,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:00,214 INFO L93 Difference]: Finished difference Result 2839 states and 10862 transitions. [2021-05-21 20:39:00,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:39:00,215 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-21 20:39:00,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:00,227 INFO L225 Difference]: With dead ends: 2839 [2021-05-21 20:39:00,228 INFO L226 Difference]: Without dead ends: 2811 [2021-05-21 20:39:00,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:39:00,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2811 states. [2021-05-21 20:39:00,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2811 to 2291. [2021-05-21 20:39:00,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 3.9375545851528386) internal successors, (9017), 2290 states have internal predecessors, (9017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:00,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 9017 transitions. [2021-05-21 20:39:00,318 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 9017 transitions. Word has length 22 [2021-05-21 20:39:00,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:00,319 INFO L482 AbstractCegarLoop]: Abstraction has 2291 states and 9017 transitions. [2021-05-21 20:39:00,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:00,319 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 9017 transitions. [2021-05-21 20:39:00,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:39:00,327 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:00,327 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:00,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-21 20:39:00,327 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:00,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:00,328 INFO L82 PathProgramCache]: Analyzing trace with hash -2040256713, now seen corresponding path program 1 times [2021-05-21 20:39:00,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:00,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716683159] [2021-05-21 20:39:00,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:00,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:00,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:00,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716683159] [2021-05-21 20:39:00,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716683159] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:00,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638161170] [2021-05-21 20:39:00,451 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 [2021-05-21 20:39:00,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:00,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:39:00,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:00,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:00,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638161170] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:00,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:00,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-05-21 20:39:00,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899200940] [2021-05-21 20:39:00,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:39:00,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:00,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:39:00,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:39:00,717 INFO L87 Difference]: Start difference. First operand 2291 states and 9017 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2021-05-21 20:39:00,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:00,942 INFO L93 Difference]: Finished difference Result 3791 states and 14505 transitions. [2021-05-21 20:39:00,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:39:00,943 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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 [2021-05-21 20:39:00,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:00,956 INFO L225 Difference]: With dead ends: 3791 [2021-05-21 20:39:00,956 INFO L226 Difference]: Without dead ends: 3655 [2021-05-21 20:39:00,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:39:00,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3655 states. [2021-05-21 20:39:01,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3655 to 2656. [2021-05-21 20:39:01,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2656 states, 2655 states have (on average 3.9450094161958567) internal successors, (10474), 2655 states have internal predecessors, (10474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:01,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2656 states to 2656 states and 10474 transitions. [2021-05-21 20:39:01,039 INFO L78 Accepts]: Start accepts. Automaton has 2656 states and 10474 transitions. Word has length 25 [2021-05-21 20:39:01,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:01,039 INFO L482 AbstractCegarLoop]: Abstraction has 2656 states and 10474 transitions. [2021-05-21 20:39:01,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2021-05-21 20:39:01,039 INFO L276 IsEmpty]: Start isEmpty. Operand 2656 states and 10474 transitions. [2021-05-21 20:39:01,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:39:01,047 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:01,047 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:01,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-21 20:39:01,269 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:01,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:01,270 INFO L82 PathProgramCache]: Analyzing trace with hash -993904687, now seen corresponding path program 2 times [2021-05-21 20:39:01,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:01,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052810245] [2021-05-21 20:39:01,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:01,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:39:01,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:01,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052810245] [2021-05-21 20:39:01,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052810245] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:01,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885353826] [2021-05-21 20:39:01,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:01,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:39:01,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:01,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:39:01,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:01,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:01,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885353826] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:01,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:01,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-05-21 20:39:01,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793346723] [2021-05-21 20:39:01,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:39:01,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:01,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:39:01,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:39:01,607 INFO L87 Difference]: Start difference. First operand 2656 states and 10474 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:01,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:01,854 INFO L93 Difference]: Finished difference Result 4004 states and 15422 transitions. [2021-05-21 20:39:01,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:39:01,854 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 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 [2021-05-21 20:39:01,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:01,870 INFO L225 Difference]: With dead ends: 4004 [2021-05-21 20:39:01,870 INFO L226 Difference]: Without dead ends: 3868 [2021-05-21 20:39:01,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:39:01,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3868 states. [2021-05-21 20:39:01,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3868 to 2991. [2021-05-21 20:39:01,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2990 states have (on average 3.9638795986622073) internal successors, (11852), 2990 states have internal predecessors, (11852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:01,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 11852 transitions. [2021-05-21 20:39:01,958 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 11852 transitions. Word has length 25 [2021-05-21 20:39:01,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:01,959 INFO L482 AbstractCegarLoop]: Abstraction has 2991 states and 11852 transitions. [2021-05-21 20:39:01,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:01,960 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 11852 transitions. [2021-05-21 20:39:01,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:39:01,969 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:01,969 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:02,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:02,185 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:02,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:02,185 INFO L82 PathProgramCache]: Analyzing trace with hash 455681823, now seen corresponding path program 3 times [2021-05-21 20:39:02,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:02,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578362887] [2021-05-21 20:39:02,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:02,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:39:02,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:02,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578362887] [2021-05-21 20:39:02,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578362887] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:39:02,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:39:02,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 20:39:02,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975626446] [2021-05-21 20:39:02,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:39:02,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:02,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:39:02,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:39:02,234 INFO L87 Difference]: Start difference. First operand 2991 states and 11852 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) [2021-05-21 20:39:02,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:02,358 INFO L93 Difference]: Finished difference Result 4207 states and 16326 transitions. [2021-05-21 20:39:02,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:39:02,359 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 [2021-05-21 20:39:02,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:02,372 INFO L225 Difference]: With dead ends: 4207 [2021-05-21 20:39:02,373 INFO L226 Difference]: Without dead ends: 4139 [2021-05-21 20:39:02,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.6ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:39:02,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4139 states. [2021-05-21 20:39:02,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4139 to 3438. [2021-05-21 20:39:02,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 3437 states have (on average 3.9793424498108814) internal successors, (13677), 3437 states have internal predecessors, (13677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:02,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 13677 transitions. [2021-05-21 20:39:02,464 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 13677 transitions. Word has length 25 [2021-05-21 20:39:02,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:02,465 INFO L482 AbstractCegarLoop]: Abstraction has 3438 states and 13677 transitions. [2021-05-21 20:39:02,465 INFO L483 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) [2021-05-21 20:39:02,465 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 13677 transitions. [2021-05-21 20:39:02,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:39:02,474 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:02,474 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:02,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-21 20:39:02,475 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:02,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:02,475 INFO L82 PathProgramCache]: Analyzing trace with hash -91124313, now seen corresponding path program 1 times [2021-05-21 20:39:02,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:02,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953310323] [2021-05-21 20:39:02,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:02,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:02,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:02,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:02,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953310323] [2021-05-21 20:39:02,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953310323] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:02,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971942197] [2021-05-21 20:39:02,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-21 20:39:02,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:02,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:39:02,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:02,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:02,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971942197] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:02,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:02,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-05-21 20:39:02,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046280315] [2021-05-21 20:39:02,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:39:02,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:02,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:39:02,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:39:02,703 INFO L87 Difference]: Start difference. First operand 3438 states and 13677 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2021-05-21 20:39:02,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:02,965 INFO L93 Difference]: Finished difference Result 4729 states and 18310 transitions. [2021-05-21 20:39:02,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:39:02,965 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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 [2021-05-21 20:39:02,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:02,979 INFO L225 Difference]: With dead ends: 4729 [2021-05-21 20:39:02,979 INFO L226 Difference]: Without dead ends: 4627 [2021-05-21 20:39:02,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:39:02,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4627 states. [2021-05-21 20:39:03,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4627 to 3870. [2021-05-21 20:39:03,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3870 states, 3869 states have (on average 3.958904109589041) internal successors, (15317), 3869 states have internal predecessors, (15317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:03,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 15317 transitions. [2021-05-21 20:39:03,105 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 15317 transitions. Word has length 25 [2021-05-21 20:39:03,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:03,105 INFO L482 AbstractCegarLoop]: Abstraction has 3870 states and 15317 transitions. [2021-05-21 20:39:03,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2021-05-21 20:39:03,105 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 15317 transitions. [2021-05-21 20:39:03,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:39:03,114 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:03,114 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:03,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-21 20:39:03,337 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:03,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:03,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1468953723, now seen corresponding path program 2 times [2021-05-21 20:39:03,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:03,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075506697] [2021-05-21 20:39:03,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:03,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:03,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:39:03,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:03,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075506697] [2021-05-21 20:39:03,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075506697] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:03,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112812280] [2021-05-21 20:39:03,381 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 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 [2021-05-21 20:39:03,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:39:03,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:03,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:39:03,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:03,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:03,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112812280] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:03,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:03,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-05-21 20:39:03,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531014279] [2021-05-21 20:39:03,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:39:03,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:03,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:39:03,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:39:03,577 INFO L87 Difference]: Start difference. First operand 3870 states and 15317 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:03,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:03,869 INFO L93 Difference]: Finished difference Result 4946 states and 19222 transitions. [2021-05-21 20:39:03,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:39:03,869 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 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 [2021-05-21 20:39:03,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:03,883 INFO L225 Difference]: With dead ends: 4946 [2021-05-21 20:39:03,883 INFO L226 Difference]: Without dead ends: 4844 [2021-05-21 20:39:03,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:39:03,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4844 states. [2021-05-21 20:39:03,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4844 to 4195. [2021-05-21 20:39:03,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4195 states, 4194 states have (on average 3.966618979494516) internal successors, (16636), 4194 states have internal predecessors, (16636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:03,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4195 states to 4195 states and 16636 transitions. [2021-05-21 20:39:03,999 INFO L78 Accepts]: Start accepts. Automaton has 4195 states and 16636 transitions. Word has length 25 [2021-05-21 20:39:04,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:04,000 INFO L482 AbstractCegarLoop]: Abstraction has 4195 states and 16636 transitions. [2021-05-21 20:39:04,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:04,000 INFO L276 IsEmpty]: Start isEmpty. Operand 4195 states and 16636 transitions. [2021-05-21 20:39:04,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:39:04,011 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:04,011 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:04,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:04,235 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:04,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:04,236 INFO L82 PathProgramCache]: Analyzing trace with hash -466013585, now seen corresponding path program 3 times [2021-05-21 20:39:04,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:04,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41931208] [2021-05-21 20:39:04,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:04,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:04,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:39:04,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:04,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41931208] [2021-05-21 20:39:04,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41931208] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:39:04,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:39:04,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 20:39:04,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395845869] [2021-05-21 20:39:04,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:39:04,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:04,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:39:04,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:39:04,296 INFO L87 Difference]: Start difference. First operand 4195 states and 16636 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) [2021-05-21 20:39:04,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:04,422 INFO L93 Difference]: Finished difference Result 5169 states and 20167 transitions. [2021-05-21 20:39:04,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:39:04,422 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 [2021-05-21 20:39:04,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:04,433 INFO L225 Difference]: With dead ends: 5169 [2021-05-21 20:39:04,433 INFO L226 Difference]: Without dead ends: 5118 [2021-05-21 20:39:04,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:39:04,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5118 states. [2021-05-21 20:39:04,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5118 to 4611. [2021-05-21 20:39:04,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4611 states, 4610 states have (on average 3.9731019522776574) internal successors, (18316), 4610 states have internal predecessors, (18316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:04,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4611 states to 4611 states and 18316 transitions. [2021-05-21 20:39:04,580 INFO L78 Accepts]: Start accepts. Automaton has 4611 states and 18316 transitions. Word has length 25 [2021-05-21 20:39:04,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:04,580 INFO L482 AbstractCegarLoop]: Abstraction has 4611 states and 18316 transitions. [2021-05-21 20:39:04,580 INFO L483 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) [2021-05-21 20:39:04,580 INFO L276 IsEmpty]: Start isEmpty. Operand 4611 states and 18316 transitions. [2021-05-21 20:39:04,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:04,592 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:04,592 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:04,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-21 20:39:04,592 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:04,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:04,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1201507300, now seen corresponding path program 4 times [2021-05-21 20:39:04,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:04,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547966141] [2021-05-21 20:39:04,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:04,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:04,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:04,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:04,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547966141] [2021-05-21 20:39:04,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547966141] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:04,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253874911] [2021-05-21 20:39:04,639 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) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:04,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:39:04,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:04,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:04,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:04,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:04,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253874911] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:04,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:04,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:39:04,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972276721] [2021-05-21 20:39:04,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:39:04,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:04,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:39:04,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:39:04,790 INFO L87 Difference]: Start difference. First operand 4611 states and 18316 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) [2021-05-21 20:39:05,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:05,716 INFO L93 Difference]: Finished difference Result 11402 states and 44327 transitions. [2021-05-21 20:39:05,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 20:39:05,716 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 28 [2021-05-21 20:39:05,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:05,750 INFO L225 Difference]: With dead ends: 11402 [2021-05-21 20:39:05,751 INFO L226 Difference]: Without dead ends: 11402 [2021-05-21 20:39:05,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 359.0ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 20:39:05,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11402 states. [2021-05-21 20:39:05,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11402 to 5821. [2021-05-21 20:39:05,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5821 states, 5820 states have (on average 4.016151202749141) internal successors, (23374), 5820 states have internal predecessors, (23374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:06,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5821 states to 5821 states and 23374 transitions. [2021-05-21 20:39:06,023 INFO L78 Accepts]: Start accepts. Automaton has 5821 states and 23374 transitions. Word has length 28 [2021-05-21 20:39:06,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:06,024 INFO L482 AbstractCegarLoop]: Abstraction has 5821 states and 23374 transitions. [2021-05-21 20:39:06,024 INFO L483 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) [2021-05-21 20:39:06,024 INFO L276 IsEmpty]: Start isEmpty. Operand 5821 states and 23374 transitions. [2021-05-21 20:39:06,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:06,040 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:06,040 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:06,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-21 20:39:06,253 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:06,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:06,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1181914093, now seen corresponding path program 5 times [2021-05-21 20:39:06,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:06,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110347733] [2021-05-21 20:39:06,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:06,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:06,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110347733] [2021-05-21 20:39:06,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110347733] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:06,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433375543] [2021-05-21 20:39:06,295 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 [2021-05-21 20:39:06,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:39:06,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:06,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:06,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:06,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:06,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433375543] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:06,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:06,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:39:06,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354882502] [2021-05-21 20:39:06,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:39:06,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:06,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:39:06,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:39:06,427 INFO L87 Difference]: Start difference. First operand 5821 states and 23374 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:07,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:07,097 INFO L93 Difference]: Finished difference Result 15383 states and 58771 transitions. [2021-05-21 20:39:07,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 20:39:07,098 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:39:07,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:07,132 INFO L225 Difference]: With dead ends: 15383 [2021-05-21 20:39:07,132 INFO L226 Difference]: Without dead ends: 15203 [2021-05-21 20:39:07,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 302.5ms TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:39:07,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15203 states. [2021-05-21 20:39:07,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15203 to 8319. [2021-05-21 20:39:07,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8319 states, 8318 states have (on average 4.118177446501563) internal successors, (34255), 8318 states have internal predecessors, (34255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:07,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8319 states to 8319 states and 34255 transitions. [2021-05-21 20:39:07,486 INFO L78 Accepts]: Start accepts. Automaton has 8319 states and 34255 transitions. Word has length 28 [2021-05-21 20:39:07,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:07,486 INFO L482 AbstractCegarLoop]: Abstraction has 8319 states and 34255 transitions. [2021-05-21 20:39:07,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:07,487 INFO L276 IsEmpty]: Start isEmpty. Operand 8319 states and 34255 transitions. [2021-05-21 20:39:07,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:07,505 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:07,505 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:07,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-21 20:39:07,711 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:07,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:07,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1237707597, now seen corresponding path program 6 times [2021-05-21 20:39:07,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:07,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249792830] [2021-05-21 20:39:07,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:07,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:07,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:07,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:07,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249792830] [2021-05-21 20:39:07,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249792830] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:07,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141496756] [2021-05-21 20:39:07,747 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 [2021-05-21 20:39:07,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:39:07,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:07,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:07,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:07,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:07,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141496756] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:07,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:07,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-05-21 20:39:07,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257937583] [2021-05-21 20:39:07,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:39:07,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:07,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:39:07,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:39:07,909 INFO L87 Difference]: Start difference. First operand 8319 states and 34255 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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) [2021-05-21 20:39:08,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:08,341 INFO L93 Difference]: Finished difference Result 16184 states and 62633 transitions. [2021-05-21 20:39:08,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:39:08,341 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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 28 [2021-05-21 20:39:08,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:08,381 INFO L225 Difference]: With dead ends: 16184 [2021-05-21 20:39:08,381 INFO L226 Difference]: Without dead ends: 16184 [2021-05-21 20:39:08,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 152.4ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:39:08,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16184 states. [2021-05-21 20:39:08,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16184 to 8319. [2021-05-21 20:39:08,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8319 states, 8318 states have (on average 4.099062274585237) internal successors, (34096), 8318 states have internal predecessors, (34096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:08,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8319 states to 8319 states and 34096 transitions. [2021-05-21 20:39:08,818 INFO L78 Accepts]: Start accepts. Automaton has 8319 states and 34096 transitions. Word has length 28 [2021-05-21 20:39:08,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:08,818 INFO L482 AbstractCegarLoop]: Abstraction has 8319 states and 34096 transitions. [2021-05-21 20:39:08,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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) [2021-05-21 20:39:08,818 INFO L276 IsEmpty]: Start isEmpty. Operand 8319 states and 34096 transitions. [2021-05-21 20:39:08,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:08,842 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:08,842 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:09,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-21 20:39:09,050 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:09,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:09,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1493879574, now seen corresponding path program 7 times [2021-05-21 20:39:09,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:09,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682048346] [2021-05-21 20:39:09,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:09,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:09,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:09,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682048346] [2021-05-21 20:39:09,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682048346] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:09,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386794281] [2021-05-21 20:39:09,082 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 [2021-05-21 20:39:09,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:09,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:09,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:09,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:09,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386794281] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:09,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:09,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-05-21 20:39:09,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801190725] [2021-05-21 20:39:09,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:39:09,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:09,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:39:09,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:39:09,257 INFO L87 Difference]: Start difference. First operand 8319 states and 34096 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:09,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:09,738 INFO L93 Difference]: Finished difference Result 10083 states and 39959 transitions. [2021-05-21 20:39:09,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:39:09,739 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:39:09,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:09,763 INFO L225 Difference]: With dead ends: 10083 [2021-05-21 20:39:09,763 INFO L226 Difference]: Without dead ends: 10027 [2021-05-21 20:39:09,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 103.9ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:39:09,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10027 states. [2021-05-21 20:39:09,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10027 to 8326. [2021-05-21 20:39:09,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8326 states, 8325 states have (on average 4.095975975975976) internal successors, (34099), 8325 states have internal predecessors, (34099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:10,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8326 states to 8326 states and 34099 transitions. [2021-05-21 20:39:10,001 INFO L78 Accepts]: Start accepts. Automaton has 8326 states and 34099 transitions. Word has length 28 [2021-05-21 20:39:10,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:10,001 INFO L482 AbstractCegarLoop]: Abstraction has 8326 states and 34099 transitions. [2021-05-21 20:39:10,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:10,002 INFO L276 IsEmpty]: Start isEmpty. Operand 8326 states and 34099 transitions. [2021-05-21 20:39:10,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:10,016 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:10,017 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:10,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:10,217 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:10,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:10,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1541673924, now seen corresponding path program 8 times [2021-05-21 20:39:10,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:10,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460216902] [2021-05-21 20:39:10,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:10,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:10,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:39:10,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:10,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460216902] [2021-05-21 20:39:10,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460216902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:10,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712366682] [2021-05-21 20:39:10,242 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) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:10,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:39:10,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:10,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:10,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:10,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:10,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712366682] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:10,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:10,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-05-21 20:39:10,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233809389] [2021-05-21 20:39:10,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:39:10,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:10,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:39:10,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:39:10,422 INFO L87 Difference]: Start difference. First operand 8326 states and 34099 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:10,533 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-05-21 20:39:11,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:11,071 INFO L93 Difference]: Finished difference Result 17529 states and 67736 transitions. [2021-05-21 20:39:11,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 20:39:11,071 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:39:11,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:11,120 INFO L225 Difference]: With dead ends: 17529 [2021-05-21 20:39:11,120 INFO L226 Difference]: Without dead ends: 17529 [2021-05-21 20:39:11,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 272.2ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:39:11,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17529 states. [2021-05-21 20:39:11,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17529 to 8432. [2021-05-21 20:39:11,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8432 states, 8431 states have (on average 4.087296880559839) internal successors, (34460), 8431 states have internal predecessors, (34460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:11,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8432 states to 8432 states and 34460 transitions. [2021-05-21 20:39:11,424 INFO L78 Accepts]: Start accepts. Automaton has 8432 states and 34460 transitions. Word has length 28 [2021-05-21 20:39:11,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:11,425 INFO L482 AbstractCegarLoop]: Abstraction has 8432 states and 34460 transitions. [2021-05-21 20:39:11,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:11,425 INFO L276 IsEmpty]: Start isEmpty. Operand 8432 states and 34460 transitions. [2021-05-21 20:39:11,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:11,439 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:11,439 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:11,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:11,640 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:11,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:11,640 INFO L82 PathProgramCache]: Analyzing trace with hash 182486291, now seen corresponding path program 9 times [2021-05-21 20:39:11,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:11,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790980678] [2021-05-21 20:39:11,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:11,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:39:11,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:11,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790980678] [2021-05-21 20:39:11,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790980678] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:11,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81865566] [2021-05-21 20:39:11,673 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 [2021-05-21 20:39:11,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:39:11,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:11,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:11,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:11,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:11,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81865566] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:11,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:11,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-05-21 20:39:11,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761378903] [2021-05-21 20:39:11,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:39:11,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:11,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:39:11,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:39:11,829 INFO L87 Difference]: Start difference. First operand 8432 states and 34460 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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) [2021-05-21 20:39:12,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:12,458 INFO L93 Difference]: Finished difference Result 15647 states and 60285 transitions. [2021-05-21 20:39:12,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:39:12,458 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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 28 [2021-05-21 20:39:12,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:12,491 INFO L225 Difference]: With dead ends: 15647 [2021-05-21 20:39:12,491 INFO L226 Difference]: Without dead ends: 15587 [2021-05-21 20:39:12,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 162.1ms TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:39:12,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15587 states. [2021-05-21 20:39:12,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15587 to 8432. [2021-05-21 20:39:12,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8432 states, 8431 states have (on average 4.084924682718539) internal successors, (34440), 8431 states have internal predecessors, (34440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:12,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8432 states to 8432 states and 34440 transitions. [2021-05-21 20:39:12,777 INFO L78 Accepts]: Start accepts. Automaton has 8432 states and 34440 transitions. Word has length 28 [2021-05-21 20:39:12,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:12,777 INFO L482 AbstractCegarLoop]: Abstraction has 8432 states and 34440 transitions. [2021-05-21 20:39:12,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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) [2021-05-21 20:39:12,777 INFO L276 IsEmpty]: Start isEmpty. Operand 8432 states and 34440 transitions. [2021-05-21 20:39:12,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:12,792 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:12,792 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:12,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:12,997 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:12,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:12,997 INFO L82 PathProgramCache]: Analyzing trace with hash -789657513, now seen corresponding path program 10 times [2021-05-21 20:39:12,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:12,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135796801] [2021-05-21 20:39:12,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:13,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:13,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:13,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:13,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135796801] [2021-05-21 20:39:13,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135796801] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:13,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266458817] [2021-05-21 20:39:13,041 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 [2021-05-21 20:39:13,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:39:13,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:13,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:13,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:13,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:13,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266458817] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:13,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:13,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-05-21 20:39:13,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143904694] [2021-05-21 20:39:13,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:39:13,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:13,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:39:13,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:39:13,218 INFO L87 Difference]: Start difference. First operand 8432 states and 34440 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:13,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:13,900 INFO L93 Difference]: Finished difference Result 18798 states and 72632 transitions. [2021-05-21 20:39:13,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 20:39:13,900 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:39:13,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:13,942 INFO L225 Difference]: With dead ends: 18798 [2021-05-21 20:39:13,942 INFO L226 Difference]: Without dead ends: 18798 [2021-05-21 20:39:13,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 200.9ms TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:39:13,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18798 states. [2021-05-21 20:39:14,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18798 to 8538. [2021-05-21 20:39:14,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8538 states, 8537 states have (on average 4.08269884034204) internal successors, (34854), 8537 states have internal predecessors, (34854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:14,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8538 states to 8538 states and 34854 transitions. [2021-05-21 20:39:14,251 INFO L78 Accepts]: Start accepts. Automaton has 8538 states and 34854 transitions. Word has length 28 [2021-05-21 20:39:14,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:14,251 INFO L482 AbstractCegarLoop]: Abstraction has 8538 states and 34854 transitions. [2021-05-21 20:39:14,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:14,251 INFO L276 IsEmpty]: Start isEmpty. Operand 8538 states and 34854 transitions. [2021-05-21 20:39:14,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:14,269 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:14,269 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:14,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-21 20:39:14,492 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:14,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:14,492 INFO L82 PathProgramCache]: Analyzing trace with hash 773722612, now seen corresponding path program 11 times [2021-05-21 20:39:14,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:14,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383403786] [2021-05-21 20:39:14,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:14,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:14,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:14,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:14,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383403786] [2021-05-21 20:39:14,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383403786] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:14,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946659929] [2021-05-21 20:39:14,516 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 [2021-05-21 20:39:14,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:39:14,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:14,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:14,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:14,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:14,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946659929] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:14,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:14,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-05-21 20:39:14,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750714422] [2021-05-21 20:39:14,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:39:14,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:14,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:39:14,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:39:14,645 INFO L87 Difference]: Start difference. First operand 8538 states and 34854 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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) [2021-05-21 20:39:15,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:15,088 INFO L93 Difference]: Finished difference Result 14070 states and 54143 transitions. [2021-05-21 20:39:15,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:39:15,088 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 28 [2021-05-21 20:39:15,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:15,227 INFO L225 Difference]: With dead ends: 14070 [2021-05-21 20:39:15,227 INFO L226 Difference]: Without dead ends: 14014 [2021-05-21 20:39:15,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 153.7ms TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:39:15,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14014 states. [2021-05-21 20:39:15,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14014 to 8538. [2021-05-21 20:39:15,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8538 states, 8537 states have (on average 4.080356096989575) internal successors, (34834), 8537 states have internal predecessors, (34834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:15,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8538 states to 8538 states and 34834 transitions. [2021-05-21 20:39:15,416 INFO L78 Accepts]: Start accepts. Automaton has 8538 states and 34834 transitions. Word has length 28 [2021-05-21 20:39:15,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:15,416 INFO L482 AbstractCegarLoop]: Abstraction has 8538 states and 34834 transitions. [2021-05-21 20:39:15,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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) [2021-05-21 20:39:15,416 INFO L276 IsEmpty]: Start isEmpty. Operand 8538 states and 34834 transitions. [2021-05-21 20:39:15,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:15,431 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:15,431 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:15,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:15,653 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:15,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:15,654 INFO L82 PathProgramCache]: Analyzing trace with hash 47154117, now seen corresponding path program 12 times [2021-05-21 20:39:15,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:15,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723088302] [2021-05-21 20:39:15,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:15,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:15,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:15,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723088302] [2021-05-21 20:39:15,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723088302] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:15,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795781489] [2021-05-21 20:39:15,689 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 [2021-05-21 20:39:15,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:39:15,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:15,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:15,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:15,851 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-05-21 20:39:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:15,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795781489] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:15,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:15,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-21 20:39:15,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001616166] [2021-05-21 20:39:15,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:39:15,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:15,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:39:15,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:39:15,952 INFO L87 Difference]: Start difference. First operand 8538 states and 34834 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:16,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:16,832 INFO L93 Difference]: Finished difference Result 18926 states and 73169 transitions. [2021-05-21 20:39:16,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 20:39:16,833 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:39:16,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:16,893 INFO L225 Difference]: With dead ends: 18926 [2021-05-21 20:39:16,893 INFO L226 Difference]: Without dead ends: 18926 [2021-05-21 20:39:16,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 271.0ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:39:16,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18926 states. [2021-05-21 20:39:17,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18926 to 8689. [2021-05-21 20:39:17,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8689 states, 8688 states have (on average 4.058586556169429) internal successors, (35261), 8688 states have internal predecessors, (35261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:17,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8689 states to 8689 states and 35261 transitions. [2021-05-21 20:39:17,308 INFO L78 Accepts]: Start accepts. Automaton has 8689 states and 35261 transitions. Word has length 28 [2021-05-21 20:39:17,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:17,309 INFO L482 AbstractCegarLoop]: Abstraction has 8689 states and 35261 transitions. [2021-05-21 20:39:17,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:17,309 INFO L276 IsEmpty]: Start isEmpty. Operand 8689 states and 35261 transitions. [2021-05-21 20:39:17,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:17,328 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:17,328 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:17,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-21 20:39:17,545 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:17,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:17,545 INFO L82 PathProgramCache]: Analyzing trace with hash 407339324, now seen corresponding path program 13 times [2021-05-21 20:39:17,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:17,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082391639] [2021-05-21 20:39:17,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:17,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:17,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:17,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:17,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082391639] [2021-05-21 20:39:17,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082391639] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:17,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313410610] [2021-05-21 20:39:17,577 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 [2021-05-21 20:39:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:17,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:17,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:17,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:17,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313410610] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:17,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:17,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-21 20:39:17,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224922494] [2021-05-21 20:39:17,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:39:17,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:17,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:39:17,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:39:17,703 INFO L87 Difference]: Start difference. First operand 8689 states and 35261 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) [2021-05-21 20:39:18,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:18,339 INFO L93 Difference]: Finished difference Result 12612 states and 48542 transitions. [2021-05-21 20:39:18,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:39:18,339 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 28 [2021-05-21 20:39:18,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:18,378 INFO L225 Difference]: With dead ends: 12612 [2021-05-21 20:39:18,379 INFO L226 Difference]: Without dead ends: 12556 [2021-05-21 20:39:18,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 171.5ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:39:18,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12556 states. [2021-05-21 20:39:18,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12556 to 8811. [2021-05-21 20:39:18,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8811 states, 8810 states have (on average 4.050397275822928) internal successors, (35684), 8810 states have internal predecessors, (35684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:18,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8811 states to 8811 states and 35684 transitions. [2021-05-21 20:39:18,603 INFO L78 Accepts]: Start accepts. Automaton has 8811 states and 35684 transitions. Word has length 28 [2021-05-21 20:39:18,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:18,603 INFO L482 AbstractCegarLoop]: Abstraction has 8811 states and 35684 transitions. [2021-05-21 20:39:18,603 INFO L483 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) [2021-05-21 20:39:18,603 INFO L276 IsEmpty]: Start isEmpty. Operand 8811 states and 35684 transitions. [2021-05-21 20:39:18,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:18,619 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:18,619 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:18,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:18,820 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:18,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:18,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1488851502, now seen corresponding path program 14 times [2021-05-21 20:39:18,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:18,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358417131] [2021-05-21 20:39:18,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:18,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:18,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:39:18,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:18,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358417131] [2021-05-21 20:39:18,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358417131] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:18,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450650632] [2021-05-21 20:39:18,843 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 [2021-05-21 20:39:18,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:39:18,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:18,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:18,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:18,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:18,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450650632] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:18,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:18,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-05-21 20:39:18,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285106039] [2021-05-21 20:39:18,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:39:18,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:18,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:39:18,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:39:18,950 INFO L87 Difference]: Start difference. First operand 8811 states and 35684 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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) [2021-05-21 20:39:19,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:19,347 INFO L93 Difference]: Finished difference Result 16530 states and 63291 transitions. [2021-05-21 20:39:19,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:39:19,347 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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 28 [2021-05-21 20:39:19,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:19,384 INFO L225 Difference]: With dead ends: 16530 [2021-05-21 20:39:19,384 INFO L226 Difference]: Without dead ends: 16530 [2021-05-21 20:39:19,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 128.9ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:39:19,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16530 states. [2021-05-21 20:39:19,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16530 to 8811. [2021-05-21 20:39:19,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8811 states, 8810 states have (on average 4.044381384790011) internal successors, (35631), 8810 states have internal predecessors, (35631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:19,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8811 states to 8811 states and 35631 transitions. [2021-05-21 20:39:19,583 INFO L78 Accepts]: Start accepts. Automaton has 8811 states and 35631 transitions. Word has length 28 [2021-05-21 20:39:19,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:19,583 INFO L482 AbstractCegarLoop]: Abstraction has 8811 states and 35631 transitions. [2021-05-21 20:39:19,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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) [2021-05-21 20:39:19,583 INFO L276 IsEmpty]: Start isEmpty. Operand 8811 states and 35631 transitions. [2021-05-21 20:39:19,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:19,597 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:19,597 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:19,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-21 20:39:19,798 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:19,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:19,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1081955579, now seen corresponding path program 15 times [2021-05-21 20:39:19,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:19,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367078994] [2021-05-21 20:39:19,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:19,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:19,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:39:19,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:19,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367078994] [2021-05-21 20:39:19,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367078994] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:19,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486229094] [2021-05-21 20:39:19,841 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 [2021-05-21 20:39:19,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:39:19,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:19,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:19,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:19,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:19,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486229094] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:19,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:19,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-05-21 20:39:19,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658168117] [2021-05-21 20:39:19,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:39:19,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:19,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:39:19,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:39:19,954 INFO L87 Difference]: Start difference. First operand 8811 states and 35631 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-05-21 20:39:20,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:20,426 INFO L93 Difference]: Finished difference Result 11652 states and 45517 transitions. [2021-05-21 20:39:20,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:39:20,426 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 28 [2021-05-21 20:39:20,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:20,456 INFO L225 Difference]: With dead ends: 11652 [2021-05-21 20:39:20,456 INFO L226 Difference]: Without dead ends: 11632 [2021-05-21 20:39:20,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 110.6ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:39:20,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11632 states. [2021-05-21 20:39:20,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11632 to 8811. [2021-05-21 20:39:20,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8811 states, 8810 states have (on average 4.043246311010216) internal successors, (35621), 8810 states have internal predecessors, (35621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:20,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8811 states to 8811 states and 35621 transitions. [2021-05-21 20:39:20,633 INFO L78 Accepts]: Start accepts. Automaton has 8811 states and 35621 transitions. Word has length 28 [2021-05-21 20:39:20,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:20,633 INFO L482 AbstractCegarLoop]: Abstraction has 8811 states and 35621 transitions. [2021-05-21 20:39:20,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-05-21 20:39:20,633 INFO L276 IsEmpty]: Start isEmpty. Operand 8811 states and 35621 transitions. [2021-05-21 20:39:20,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:20,648 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:20,648 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:20,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-21 20:39:20,849 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:20,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:20,849 INFO L82 PathProgramCache]: Analyzing trace with hash -2054099383, now seen corresponding path program 16 times [2021-05-21 20:39:20,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:20,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267156553] [2021-05-21 20:39:20,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:20,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:39:20,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:20,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267156553] [2021-05-21 20:39:20,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267156553] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:20,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714162485] [2021-05-21 20:39:20,874 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 [2021-05-21 20:39:20,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:39:20,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:20,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:20,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:21,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:21,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714162485] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:21,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:21,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-05-21 20:39:21,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620103208] [2021-05-21 20:39:21,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:39:21,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:21,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:39:21,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:39:21,005 INFO L87 Difference]: Start difference. First operand 8811 states and 35621 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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) [2021-05-21 20:39:21,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:21,424 INFO L93 Difference]: Finished difference Result 13573 states and 53112 transitions. [2021-05-21 20:39:21,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:39:21,424 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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 28 [2021-05-21 20:39:21,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:21,456 INFO L225 Difference]: With dead ends: 13573 [2021-05-21 20:39:21,456 INFO L226 Difference]: Without dead ends: 13573 [2021-05-21 20:39:21,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 123.1ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-05-21 20:39:21,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13573 states. [2021-05-21 20:39:21,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13573 to 8864. [2021-05-21 20:39:21,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8864 states, 8863 states have (on average 4.042423558614464) internal successors, (35828), 8863 states have internal predecessors, (35828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:21,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8864 states to 8864 states and 35828 transitions. [2021-05-21 20:39:21,735 INFO L78 Accepts]: Start accepts. Automaton has 8864 states and 35828 transitions. Word has length 28 [2021-05-21 20:39:21,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:21,735 INFO L482 AbstractCegarLoop]: Abstraction has 8864 states and 35828 transitions. [2021-05-21 20:39:21,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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) [2021-05-21 20:39:21,735 INFO L276 IsEmpty]: Start isEmpty. Operand 8864 states and 35828 transitions. [2021-05-21 20:39:21,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:21,752 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:21,752 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:21,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-21 20:39:21,953 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:21,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:21,953 INFO L82 PathProgramCache]: Analyzing trace with hash -490719258, now seen corresponding path program 17 times [2021-05-21 20:39:21,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:21,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539690644] [2021-05-21 20:39:21,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:21,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:21,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:39:21,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:21,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539690644] [2021-05-21 20:39:21,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539690644] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:21,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249185388] [2021-05-21 20:39:21,985 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:22,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:39:22,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:22,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:22,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:22,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:22,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249185388] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:22,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:22,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-05-21 20:39:22,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580689525] [2021-05-21 20:39:22,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:39:22,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:22,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:39:22,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:39:22,098 INFO L87 Difference]: Start difference. First operand 8864 states and 35828 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:22,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:22,517 INFO L93 Difference]: Finished difference Result 14465 states and 55050 transitions. [2021-05-21 20:39:22,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:39:22,517 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:39:22,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:22,556 INFO L225 Difference]: With dead ends: 14465 [2021-05-21 20:39:22,556 INFO L226 Difference]: Without dead ends: 14437 [2021-05-21 20:39:22,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 157.2ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:39:22,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14437 states. [2021-05-21 20:39:22,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14437 to 8864. [2021-05-21 20:39:22,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8864 states, 8863 states have (on average 4.0412952724811015) internal successors, (35818), 8863 states have internal predecessors, (35818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:22,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8864 states to 8864 states and 35818 transitions. [2021-05-21 20:39:22,799 INFO L78 Accepts]: Start accepts. Automaton has 8864 states and 35818 transitions. Word has length 28 [2021-05-21 20:39:22,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:22,799 INFO L482 AbstractCegarLoop]: Abstraction has 8864 states and 35818 transitions. [2021-05-21 20:39:22,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:22,800 INFO L276 IsEmpty]: Start isEmpty. Operand 8864 states and 35818 transitions. [2021-05-21 20:39:22,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:22,813 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:22,813 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:23,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-21 20:39:23,014 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:23,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:23,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1217287753, now seen corresponding path program 18 times [2021-05-21 20:39:23,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:23,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331946651] [2021-05-21 20:39:23,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:23,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:23,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:23,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:23,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331946651] [2021-05-21 20:39:23,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331946651] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:23,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610298391] [2021-05-21 20:39:23,047 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:23,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:39:23,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:23,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:23,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:23,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:23,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610298391] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:23,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:23,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-05-21 20:39:23,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157348124] [2021-05-21 20:39:23,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:39:23,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:23,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:39:23,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:39:23,193 INFO L87 Difference]: Start difference. First operand 8864 states and 35818 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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) [2021-05-21 20:39:23,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:23,898 INFO L93 Difference]: Finished difference Result 17059 states and 67264 transitions. [2021-05-21 20:39:23,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 20:39:23,898 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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 28 [2021-05-21 20:39:23,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:23,941 INFO L225 Difference]: With dead ends: 17059 [2021-05-21 20:39:23,941 INFO L226 Difference]: Without dead ends: 17059 [2021-05-21 20:39:23,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 222.3ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:39:23,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17059 states. [2021-05-21 20:39:24,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17059 to 8917. [2021-05-21 20:39:24,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8917 states, 8916 states have (on average 4.040489008524002) internal successors, (36025), 8916 states have internal predecessors, (36025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:24,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8917 states to 8917 states and 36025 transitions. [2021-05-21 20:39:24,190 INFO L78 Accepts]: Start accepts. Automaton has 8917 states and 36025 transitions. Word has length 28 [2021-05-21 20:39:24,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:24,191 INFO L482 AbstractCegarLoop]: Abstraction has 8917 states and 36025 transitions. [2021-05-21 20:39:24,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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) [2021-05-21 20:39:24,191 INFO L276 IsEmpty]: Start isEmpty. Operand 8917 states and 36025 transitions. [2021-05-21 20:39:24,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:24,207 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:24,207 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:24,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:24,408 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:24,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:24,408 INFO L82 PathProgramCache]: Analyzing trace with hash -857102546, now seen corresponding path program 19 times [2021-05-21 20:39:24,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:24,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468263263] [2021-05-21 20:39:24,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:24,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:24,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:24,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468263263] [2021-05-21 20:39:24,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468263263] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:24,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932940813] [2021-05-21 20:39:24,440 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:24,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:24,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:24,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:24,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:24,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932940813] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:24,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:24,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-05-21 20:39:24,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716961064] [2021-05-21 20:39:24,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:39:24,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:24,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:39:24,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:39:24,546 INFO L87 Difference]: Start difference. First operand 8917 states and 36025 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:25,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:25,108 INFO L93 Difference]: Finished difference Result 17336 states and 65142 transitions. [2021-05-21 20:39:25,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 20:39:25,109 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:39:25,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:25,145 INFO L225 Difference]: With dead ends: 17336 [2021-05-21 20:39:25,146 INFO L226 Difference]: Without dead ends: 17224 [2021-05-21 20:39:25,146 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 249.3ms TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:39:25,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17224 states. [2021-05-21 20:39:25,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17224 to 8917. [2021-05-21 20:39:25,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8917 states, 8916 states have (on average 4.039367429340511) internal successors, (36015), 8916 states have internal predecessors, (36015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:25,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8917 states to 8917 states and 36015 transitions. [2021-05-21 20:39:25,400 INFO L78 Accepts]: Start accepts. Automaton has 8917 states and 36015 transitions. Word has length 28 [2021-05-21 20:39:25,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:25,400 INFO L482 AbstractCegarLoop]: Abstraction has 8917 states and 36015 transitions. [2021-05-21 20:39:25,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:25,400 INFO L276 IsEmpty]: Start isEmpty. Operand 8917 states and 36015 transitions. [2021-05-21 20:39:25,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:25,415 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:25,415 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:25,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:25,617 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:25,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:25,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1623161651, now seen corresponding path program 20 times [2021-05-21 20:39:25,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:25,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46440374] [2021-05-21 20:39:25,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:25,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:25,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:25,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:25,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46440374] [2021-05-21 20:39:25,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46440374] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:25,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147216802] [2021-05-21 20:39:25,652 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:25,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:39:25,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:25,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:25,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:25,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:25,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147216802] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:25,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:25,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:39:25,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297825209] [2021-05-21 20:39:25,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:39:25,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:25,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:39:25,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:39:25,775 INFO L87 Difference]: Start difference. First operand 8917 states and 36015 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:26,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:26,538 INFO L93 Difference]: Finished difference Result 13676 states and 54158 transitions. [2021-05-21 20:39:26,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 20:39:26,538 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:39:26,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:26,574 INFO L225 Difference]: With dead ends: 13676 [2021-05-21 20:39:26,574 INFO L226 Difference]: Without dead ends: 13676 [2021-05-21 20:39:26,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 325.9ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 20:39:26,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13676 states. [2021-05-21 20:39:26,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13676 to 9131. [2021-05-21 20:39:26,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9131 states, 9130 states have (on average 4.022562979189485) internal successors, (36726), 9130 states have internal predecessors, (36726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:26,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9131 states to 9131 states and 36726 transitions. [2021-05-21 20:39:26,770 INFO L78 Accepts]: Start accepts. Automaton has 9131 states and 36726 transitions. Word has length 28 [2021-05-21 20:39:26,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:26,770 INFO L482 AbstractCegarLoop]: Abstraction has 9131 states and 36726 transitions. [2021-05-21 20:39:26,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:26,770 INFO L276 IsEmpty]: Start isEmpty. Operand 9131 states and 36726 transitions. [2021-05-21 20:39:26,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:26,785 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:26,785 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:26,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-21 20:39:26,994 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:26,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:26,994 INFO L82 PathProgramCache]: Analyzing trace with hash -331624474, now seen corresponding path program 21 times [2021-05-21 20:39:26,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:26,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427285215] [2021-05-21 20:39:26,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:26,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:27,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:27,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:27,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427285215] [2021-05-21 20:39:27,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427285215] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:27,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763581826] [2021-05-21 20:39:27,031 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:27,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:39:27,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:27,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:27,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:27,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:27,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763581826] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:27,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:27,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:39:27,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123534574] [2021-05-21 20:39:27,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:39:27,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:27,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:39:27,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:39:27,142 INFO L87 Difference]: Start difference. First operand 9131 states and 36726 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:27,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:27,635 INFO L93 Difference]: Finished difference Result 15155 states and 56901 transitions. [2021-05-21 20:39:27,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 20:39:27,636 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:39:27,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:27,669 INFO L225 Difference]: With dead ends: 15155 [2021-05-21 20:39:27,669 INFO L226 Difference]: Without dead ends: 15043 [2021-05-21 20:39:27,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 221.4ms TimeCoverageRelationStatistics Valid=198, Invalid=732, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:39:27,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15043 states. [2021-05-21 20:39:27,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15043 to 9347. [2021-05-21 20:39:27,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9347 states, 9346 states have (on average 4.008238818745988) internal successors, (37461), 9346 states have internal predecessors, (37461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:27,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9347 states to 9347 states and 37461 transitions. [2021-05-21 20:39:27,908 INFO L78 Accepts]: Start accepts. Automaton has 9347 states and 37461 transitions. Word has length 28 [2021-05-21 20:39:27,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:27,908 INFO L482 AbstractCegarLoop]: Abstraction has 9347 states and 37461 transitions. [2021-05-21 20:39:27,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:27,908 INFO L276 IsEmpty]: Start isEmpty. Operand 9347 states and 37461 transitions. [2021-05-21 20:39:27,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:27,925 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:27,925 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:28,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:28,126 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:28,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:28,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1738838736, now seen corresponding path program 22 times [2021-05-21 20:39:28,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:28,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881717403] [2021-05-21 20:39:28,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:28,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:28,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:28,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:28,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881717403] [2021-05-21 20:39:28,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881717403] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:28,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804219723] [2021-05-21 20:39:28,159 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:28,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:39:28,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:28,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:28,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:28,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:28,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804219723] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:28,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:28,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-21 20:39:28,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127584482] [2021-05-21 20:39:28,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:39:28,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:28,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:39:28,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:39:28,294 INFO L87 Difference]: Start difference. First operand 9347 states and 37461 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:28,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:28,997 INFO L93 Difference]: Finished difference Result 16354 states and 63144 transitions. [2021-05-21 20:39:28,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 20:39:28,997 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:39:28,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:29,039 INFO L225 Difference]: With dead ends: 16354 [2021-05-21 20:39:29,039 INFO L226 Difference]: Without dead ends: 16354 [2021-05-21 20:39:29,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 247.5ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:39:29,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16354 states. [2021-05-21 20:39:29,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16354 to 9241. [2021-05-21 20:39:29,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9241 states, 9240 states have (on average 3.997943722943723) internal successors, (36941), 9240 states have internal predecessors, (36941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:29,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9241 states to 9241 states and 36941 transitions. [2021-05-21 20:39:29,286 INFO L78 Accepts]: Start accepts. Automaton has 9241 states and 36941 transitions. Word has length 28 [2021-05-21 20:39:29,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:29,286 INFO L482 AbstractCegarLoop]: Abstraction has 9241 states and 36941 transitions. [2021-05-21 20:39:29,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:29,286 INFO L276 IsEmpty]: Start isEmpty. Operand 9241 states and 36941 transitions. [2021-05-21 20:39:29,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:29,301 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:29,301 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:29,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-21 20:39:29,502 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:29,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:29,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1444912965, now seen corresponding path program 23 times [2021-05-21 20:39:29,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:29,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084150794] [2021-05-21 20:39:29,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:29,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:29,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:29,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:29,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084150794] [2021-05-21 20:39:29,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084150794] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:29,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212879952] [2021-05-21 20:39:29,536 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:29,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:39:29,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:29,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:29,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:29,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:29,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212879952] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:29,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:29,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-21 20:39:29,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596152866] [2021-05-21 20:39:29,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:39:29,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:29,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:39:29,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:39:29,653 INFO L87 Difference]: Start difference. First operand 9241 states and 36941 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-05-21 20:39:30,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:30,113 INFO L93 Difference]: Finished difference Result 12762 states and 48779 transitions. [2021-05-21 20:39:30,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:39:30,114 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 28 [2021-05-21 20:39:30,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:30,143 INFO L225 Difference]: With dead ends: 12762 [2021-05-21 20:39:30,143 INFO L226 Difference]: Without dead ends: 12722 [2021-05-21 20:39:30,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 171.7ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:39:30,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12722 states. [2021-05-21 20:39:30,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12722 to 8983. [2021-05-21 20:39:30,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8983 states, 8982 states have (on average 4.0035626809173905) internal successors, (35960), 8982 states have internal predecessors, (35960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:30,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8983 states to 8983 states and 35960 transitions. [2021-05-21 20:39:30,362 INFO L78 Accepts]: Start accepts. Automaton has 8983 states and 35960 transitions. Word has length 28 [2021-05-21 20:39:30,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:30,363 INFO L482 AbstractCegarLoop]: Abstraction has 8983 states and 35960 transitions. [2021-05-21 20:39:30,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-05-21 20:39:30,363 INFO L276 IsEmpty]: Start isEmpty. Operand 8983 states and 35960 transitions. [2021-05-21 20:39:30,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:30,378 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:30,378 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:30,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-21 20:39:30,579 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:30,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:30,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1089598035, now seen corresponding path program 4 times [2021-05-21 20:39:30,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:30,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746952988] [2021-05-21 20:39:30,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:30,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:30,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:30,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746952988] [2021-05-21 20:39:30,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746952988] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:30,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741583919] [2021-05-21 20:39:30,618 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:30,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:39:30,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:30,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:30,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:30,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741583919] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:30,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:30,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:39:30,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199784993] [2021-05-21 20:39:30,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:39:30,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:30,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:39:30,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:39:30,719 INFO L87 Difference]: Start difference. First operand 8983 states and 35960 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:31,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:31,546 INFO L93 Difference]: Finished difference Result 30234 states and 120265 transitions. [2021-05-21 20:39:31,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 20:39:31,547 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:39:31,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:31,636 INFO L225 Difference]: With dead ends: 30234 [2021-05-21 20:39:31,636 INFO L226 Difference]: Without dead ends: 30234 [2021-05-21 20:39:31,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 309.5ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 20:39:31,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30234 states. [2021-05-21 20:39:31,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30234 to 14412. [2021-05-21 20:39:31,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14412 states, 14411 states have (on average 4.099715495107904) internal successors, (59081), 14411 states have internal predecessors, (59081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:32,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14412 states to 14412 states and 59081 transitions. [2021-05-21 20:39:32,040 INFO L78 Accepts]: Start accepts. Automaton has 14412 states and 59081 transitions. Word has length 28 [2021-05-21 20:39:32,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:32,040 INFO L482 AbstractCegarLoop]: Abstraction has 14412 states and 59081 transitions. [2021-05-21 20:39:32,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:32,041 INFO L276 IsEmpty]: Start isEmpty. Operand 14412 states and 59081 transitions. [2021-05-21 20:39:32,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:32,067 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:32,067 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:32,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-21 20:39:32,268 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:32,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:32,268 INFO L82 PathProgramCache]: Analyzing trace with hash 473096940, now seen corresponding path program 5 times [2021-05-21 20:39:32,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:32,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246173417] [2021-05-21 20:39:32,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:32,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:32,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:32,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:32,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246173417] [2021-05-21 20:39:32,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246173417] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:32,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731414162] [2021-05-21 20:39:32,300 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:32,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:39:32,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:32,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:32,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:32,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:32,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731414162] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:32,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:32,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:39:32,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245129730] [2021-05-21 20:39:32,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:39:32,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:32,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:39:32,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:39:32,399 INFO L87 Difference]: Start difference. First operand 14412 states and 59081 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:33,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:33,101 INFO L93 Difference]: Finished difference Result 40819 states and 161536 transitions. [2021-05-21 20:39:33,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 20:39:33,102 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:39:33,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:33,214 INFO L225 Difference]: With dead ends: 40819 [2021-05-21 20:39:33,214 INFO L226 Difference]: Without dead ends: 40578 [2021-05-21 20:39:33,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 251.5ms TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:39:33,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40578 states. [2021-05-21 20:39:33,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40578 to 24036. [2021-05-21 20:39:33,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24036 states, 24035 states have (on average 4.249511129602663) internal successors, (102137), 24035 states have internal predecessors, (102137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:33,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24036 states to 24036 states and 102137 transitions. [2021-05-21 20:39:33,994 INFO L78 Accepts]: Start accepts. Automaton has 24036 states and 102137 transitions. Word has length 28 [2021-05-21 20:39:33,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:33,994 INFO L482 AbstractCegarLoop]: Abstraction has 24036 states and 102137 transitions. [2021-05-21 20:39:33,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:33,994 INFO L276 IsEmpty]: Start isEmpty. Operand 24036 states and 102137 transitions. [2021-05-21 20:39:34,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:34,046 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:34,046 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:34,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-21 20:39:34,247 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:34,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:34,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1472081004, now seen corresponding path program 6 times [2021-05-21 20:39:34,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:34,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211020536] [2021-05-21 20:39:34,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:34,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:34,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:34,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:34,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211020536] [2021-05-21 20:39:34,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211020536] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:34,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012993761] [2021-05-21 20:39:34,287 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:34,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:39:34,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:34,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:34,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:34,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:34,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012993761] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:34,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:34,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-05-21 20:39:34,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047464151] [2021-05-21 20:39:34,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:39:34,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:34,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:39:34,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:39:34,392 INFO L87 Difference]: Start difference. First operand 24036 states and 102137 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:34,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:34,932 INFO L93 Difference]: Finished difference Result 42953 states and 171667 transitions. [2021-05-21 20:39:34,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:39:34,932 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:39:34,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:35,045 INFO L225 Difference]: With dead ends: 42953 [2021-05-21 20:39:35,045 INFO L226 Difference]: Without dead ends: 42953 [2021-05-21 20:39:35,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 160.6ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:39:35,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42953 states. [2021-05-21 20:39:35,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42953 to 24036. [2021-05-21 20:39:35,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24036 states, 24035 states have (on average 4.228292074058665) internal successors, (101627), 24035 states have internal predecessors, (101627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:35,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24036 states to 24036 states and 101627 transitions. [2021-05-21 20:39:35,964 INFO L78 Accepts]: Start accepts. Automaton has 24036 states and 101627 transitions. Word has length 28 [2021-05-21 20:39:35,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:35,965 INFO L482 AbstractCegarLoop]: Abstraction has 24036 states and 101627 transitions. [2021-05-21 20:39:35,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:35,965 INFO L276 IsEmpty]: Start isEmpty. Operand 24036 states and 101627 transitions. [2021-05-21 20:39:36,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:36,008 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:36,008 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:36,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-21 20:39:36,213 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:36,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:36,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1500245315, now seen corresponding path program 7 times [2021-05-21 20:39:36,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:36,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172159113] [2021-05-21 20:39:36,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:36,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:36,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:36,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172159113] [2021-05-21 20:39:36,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172159113] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:36,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926913891] [2021-05-21 20:39:36,238 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:36,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:36,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:36,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:36,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926913891] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:36,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:36,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-05-21 20:39:36,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043300658] [2021-05-21 20:39:36,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:39:36,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:36,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:39:36,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:39:36,347 INFO L87 Difference]: Start difference. First operand 24036 states and 101627 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-05-21 20:39:36,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:36,879 INFO L93 Difference]: Finished difference Result 29179 states and 119232 transitions. [2021-05-21 20:39:36,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:39:36,879 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 28 [2021-05-21 20:39:36,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:36,968 INFO L225 Difference]: With dead ends: 29179 [2021-05-21 20:39:36,968 INFO L226 Difference]: Without dead ends: 29131 [2021-05-21 20:39:36,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:39:37,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29131 states. [2021-05-21 20:39:37,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29131 to 24202. [2021-05-21 20:39:37,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24202 states, 24201 states have (on average 4.223296557993471) internal successors, (102208), 24201 states have internal predecessors, (102208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:37,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24202 states to 24202 states and 102208 transitions. [2021-05-21 20:39:37,648 INFO L78 Accepts]: Start accepts. Automaton has 24202 states and 102208 transitions. Word has length 28 [2021-05-21 20:39:37,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:37,649 INFO L482 AbstractCegarLoop]: Abstraction has 24202 states and 102208 transitions. [2021-05-21 20:39:37,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-05-21 20:39:37,649 INFO L276 IsEmpty]: Start isEmpty. Operand 24202 states and 102208 transitions. [2021-05-21 20:39:37,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:37,696 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:37,696 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:37,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:37,897 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:37,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:37,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1268278573, now seen corresponding path program 8 times [2021-05-21 20:39:37,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:37,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091031418] [2021-05-21 20:39:37,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:37,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:37,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:39:37,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:37,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091031418] [2021-05-21 20:39:37,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091031418] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:37,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897381265] [2021-05-21 20:39:37,916 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:37,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:39:37,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:37,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:37,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:38,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:38,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897381265] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:38,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:38,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-05-21 20:39:38,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473825962] [2021-05-21 20:39:38,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:39:38,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:38,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:39:38,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:39:38,032 INFO L87 Difference]: Start difference. First operand 24202 states and 102208 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:38,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:38,875 INFO L93 Difference]: Finished difference Result 49310 states and 196485 transitions. [2021-05-21 20:39:38,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 20:39:38,876 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:39:38,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:39,036 INFO L225 Difference]: With dead ends: 49310 [2021-05-21 20:39:39,036 INFO L226 Difference]: Without dead ends: 49310 [2021-05-21 20:39:39,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 142.3ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:39:39,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49310 states. [2021-05-21 20:39:39,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49310 to 24542. [2021-05-21 20:39:39,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24542 states, 24541 states have (on average 4.213683223992502) internal successors, (103408), 24541 states have internal predecessors, (103408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:39,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24542 states to 24542 states and 103408 transitions. [2021-05-21 20:39:39,883 INFO L78 Accepts]: Start accepts. Automaton has 24542 states and 103408 transitions. Word has length 28 [2021-05-21 20:39:39,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:39,883 INFO L482 AbstractCegarLoop]: Abstraction has 24542 states and 103408 transitions. [2021-05-21 20:39:39,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:39,883 INFO L276 IsEmpty]: Start isEmpty. Operand 24542 states and 103408 transitions. [2021-05-21 20:39:39,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:39,931 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:39,931 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:40,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-21 20:39:40,132 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:40,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:40,132 INFO L82 PathProgramCache]: Analyzing trace with hash 559591502, now seen corresponding path program 9 times [2021-05-21 20:39:40,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:40,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800767744] [2021-05-21 20:39:40,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:40,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:39:40,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:40,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800767744] [2021-05-21 20:39:40,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800767744] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:40,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416786144] [2021-05-21 20:39:40,161 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:40,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:39:40,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:40,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:40,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:40,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416786144] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:40,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:40,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-05-21 20:39:40,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248411993] [2021-05-21 20:39:40,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:39:40,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:40,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:39:40,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:39:40,529 INFO L87 Difference]: Start difference. First operand 24542 states and 103408 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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) [2021-05-21 20:39:41,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:41,221 INFO L93 Difference]: Finished difference Result 43190 states and 171488 transitions. [2021-05-21 20:39:41,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:39:41,222 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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 28 [2021-05-21 20:39:41,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:41,330 INFO L225 Difference]: With dead ends: 43190 [2021-05-21 20:39:41,330 INFO L226 Difference]: Without dead ends: 43115 [2021-05-21 20:39:41,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 190.9ms TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:39:41,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43115 states. [2021-05-21 20:39:42,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43115 to 24542. [2021-05-21 20:39:42,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24542 states, 24541 states have (on average 4.212705268733956) internal successors, (103384), 24541 states have internal predecessors, (103384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:42,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24542 states to 24542 states and 103384 transitions. [2021-05-21 20:39:42,342 INFO L78 Accepts]: Start accepts. Automaton has 24542 states and 103384 transitions. Word has length 28 [2021-05-21 20:39:42,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:42,342 INFO L482 AbstractCegarLoop]: Abstraction has 24542 states and 103384 transitions. [2021-05-21 20:39:42,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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) [2021-05-21 20:39:42,342 INFO L276 IsEmpty]: Start isEmpty. Operand 24542 states and 103384 transitions. [2021-05-21 20:39:42,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:42,389 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:42,389 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:42,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-21 20:39:42,590 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:42,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:42,591 INFO L82 PathProgramCache]: Analyzing trace with hash -402212590, now seen corresponding path program 10 times [2021-05-21 20:39:42,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:42,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996652302] [2021-05-21 20:39:42,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:42,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:42,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:42,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996652302] [2021-05-21 20:39:42,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996652302] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:42,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703864038] [2021-05-21 20:39:42,614 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:42,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:39:42,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:42,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:42,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:42,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:42,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703864038] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:42,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:42,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-05-21 20:39:42,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032067400] [2021-05-21 20:39:42,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:39:42,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:42,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:39:42,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:39:42,739 INFO L87 Difference]: Start difference. First operand 24542 states and 103384 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) [2021-05-21 20:39:43,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:43,759 INFO L93 Difference]: Finished difference Result 51588 states and 205543 transitions. [2021-05-21 20:39:43,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 20:39:43,759 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 28 [2021-05-21 20:39:43,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:43,931 INFO L225 Difference]: With dead ends: 51588 [2021-05-21 20:39:43,931 INFO L226 Difference]: Without dead ends: 51588 [2021-05-21 20:39:43,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 221.3ms TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:39:44,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51588 states. [2021-05-21 20:39:44,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51588 to 24882. [2021-05-21 20:39:44,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24882 states, 24881 states have (on average 4.210200554640087) internal successors, (104754), 24881 states have internal predecessors, (104754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:44,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24882 states to 24882 states and 104754 transitions. [2021-05-21 20:39:44,817 INFO L78 Accepts]: Start accepts. Automaton has 24882 states and 104754 transitions. Word has length 28 [2021-05-21 20:39:44,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:44,818 INFO L482 AbstractCegarLoop]: Abstraction has 24882 states and 104754 transitions. [2021-05-21 20:39:44,818 INFO L483 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) [2021-05-21 20:39:44,818 INFO L276 IsEmpty]: Start isEmpty. Operand 24882 states and 104754 transitions. [2021-05-21 20:39:44,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:44,868 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:44,868 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:45,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:45,069 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:45,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:45,069 INFO L82 PathProgramCache]: Analyzing trace with hash -374048279, now seen corresponding path program 11 times [2021-05-21 20:39:45,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:45,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470211296] [2021-05-21 20:39:45,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:45,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:45,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470211296] [2021-05-21 20:39:45,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470211296] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:45,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625818828] [2021-05-21 20:39:45,091 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:45,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:39:45,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:45,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:45,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:45,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:45,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625818828] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:45,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:45,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-05-21 20:39:45,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560786440] [2021-05-21 20:39:45,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:39:45,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:45,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:39:45,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:39:45,197 INFO L87 Difference]: Start difference. First operand 24882 states and 104754 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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) [2021-05-21 20:39:45,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:45,942 INFO L93 Difference]: Finished difference Result 39744 states and 158044 transitions. [2021-05-21 20:39:45,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:39:45,942 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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 28 [2021-05-21 20:39:45,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:46,045 INFO L225 Difference]: With dead ends: 39744 [2021-05-21 20:39:46,045 INFO L226 Difference]: Without dead ends: 39696 [2021-05-21 20:39:46,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 138.1ms TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:39:46,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39696 states. [2021-05-21 20:39:46,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39696 to 24882. [2021-05-21 20:39:46,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24882 states, 24881 states have (on average 4.209235963184759) internal successors, (104730), 24881 states have internal predecessors, (104730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:46,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24882 states to 24882 states and 104730 transitions. [2021-05-21 20:39:46,805 INFO L78 Accepts]: Start accepts. Automaton has 24882 states and 104730 transitions. Word has length 28 [2021-05-21 20:39:46,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:46,805 INFO L482 AbstractCegarLoop]: Abstraction has 24882 states and 104730 transitions. [2021-05-21 20:39:46,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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) [2021-05-21 20:39:46,805 INFO L276 IsEmpty]: Start isEmpty. Operand 24882 states and 104730 transitions. [2021-05-21 20:39:46,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:46,855 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:46,855 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:47,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-21 20:39:47,056 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:47,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:47,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1874668720, now seen corresponding path program 12 times [2021-05-21 20:39:47,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:47,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507244922] [2021-05-21 20:39:47,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:47,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:47,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:47,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:47,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507244922] [2021-05-21 20:39:47,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507244922] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:47,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357805808] [2021-05-21 20:39:47,083 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:47,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:39:47,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:47,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:47,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:47,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:47,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357805808] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:47,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:47,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-21 20:39:47,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550971146] [2021-05-21 20:39:47,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:39:47,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:47,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:39:47,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:39:47,186 INFO L87 Difference]: Start difference. First operand 24882 states and 104730 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-05-21 20:39:47,484 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-05-21 20:39:48,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:48,283 INFO L93 Difference]: Finished difference Result 51567 states and 205376 transitions. [2021-05-21 20:39:48,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 20:39:48,283 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 28 [2021-05-21 20:39:48,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:48,457 INFO L225 Difference]: With dead ends: 51567 [2021-05-21 20:39:48,457 INFO L226 Difference]: Without dead ends: 51567 [2021-05-21 20:39:48,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 445.5ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:39:48,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51567 states. [2021-05-21 20:39:49,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51567 to 25308. [2021-05-21 20:39:49,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25308 states, 25307 states have (on average 4.182123523135891) internal successors, (105837), 25307 states have internal predecessors, (105837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:49,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25308 states to 25308 states and 105837 transitions. [2021-05-21 20:39:49,624 INFO L78 Accepts]: Start accepts. Automaton has 25308 states and 105837 transitions. Word has length 28 [2021-05-21 20:39:49,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:49,642 INFO L482 AbstractCegarLoop]: Abstraction has 25308 states and 105837 transitions. [2021-05-21 20:39:49,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-05-21 20:39:49,642 INFO L276 IsEmpty]: Start isEmpty. Operand 25308 states and 105837 transitions. [2021-05-21 20:39:49,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:49,710 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:49,710 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:49,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:49,911 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:49,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:49,911 INFO L82 PathProgramCache]: Analyzing trace with hash -652745811, now seen corresponding path program 13 times [2021-05-21 20:39:49,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:49,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069601322] [2021-05-21 20:39:49,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:49,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:49,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:49,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:49,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069601322] [2021-05-21 20:39:49,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069601322] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:49,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997628890] [2021-05-21 20:39:49,951 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:49,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:49,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:49,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:50,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997628890] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:50,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:50,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-21 20:39:50,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656078680] [2021-05-21 20:39:50,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:39:50,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:50,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:39:50,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:39:50,055 INFO L87 Difference]: Start difference. First operand 25308 states and 105837 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-05-21 20:39:50,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:50,622 INFO L93 Difference]: Finished difference Result 35545 states and 141251 transitions. [2021-05-21 20:39:50,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:39:50,623 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 28 [2021-05-21 20:39:50,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:50,712 INFO L225 Difference]: With dead ends: 35545 [2021-05-21 20:39:50,712 INFO L226 Difference]: Without dead ends: 35497 [2021-05-21 20:39:50,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 151.4ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:39:50,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35497 states. [2021-05-21 20:39:51,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35497 to 25624. [2021-05-21 20:39:51,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25624 states, 25623 states have (on average 4.173633064044023) internal successors, (106941), 25623 states have internal predecessors, (106941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:51,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25624 states to 25624 states and 106941 transitions. [2021-05-21 20:39:51,468 INFO L78 Accepts]: Start accepts. Automaton has 25624 states and 106941 transitions. Word has length 28 [2021-05-21 20:39:51,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:51,469 INFO L482 AbstractCegarLoop]: Abstraction has 25624 states and 106941 transitions. [2021-05-21 20:39:51,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-05-21 20:39:51,469 INFO L276 IsEmpty]: Start isEmpty. Operand 25624 states and 106941 transitions. [2021-05-21 20:39:51,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:51,521 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:51,521 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:51,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-21 20:39:51,742 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:51,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:51,743 INFO L82 PathProgramCache]: Analyzing trace with hash -229548541, now seen corresponding path program 14 times [2021-05-21 20:39:51,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:51,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670150763] [2021-05-21 20:39:51,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:51,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:51,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:39:51,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:51,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670150763] [2021-05-21 20:39:51,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670150763] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:51,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242518867] [2021-05-21 20:39:51,764 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:51,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:39:51,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:51,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:51,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:52,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:52,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242518867] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:52,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:52,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-05-21 20:39:52,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642811424] [2021-05-21 20:39:52,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:39:52,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:52,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:39:52,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:39:52,043 INFO L87 Difference]: Start difference. First operand 25624 states and 106941 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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) [2021-05-21 20:39:52,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:52,594 INFO L93 Difference]: Finished difference Result 46151 states and 182270 transitions. [2021-05-21 20:39:52,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:39:52,595 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 28 [2021-05-21 20:39:52,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:52,723 INFO L225 Difference]: With dead ends: 46151 [2021-05-21 20:39:52,723 INFO L226 Difference]: Without dead ends: 46151 [2021-05-21 20:39:52,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:39:52,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46151 states. [2021-05-21 20:39:53,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46151 to 25624. [2021-05-21 20:39:53,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25624 states, 25623 states have (on average 4.166998399875112) internal successors, (106771), 25623 states have internal predecessors, (106771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:53,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25624 states to 25624 states and 106771 transitions. [2021-05-21 20:39:53,605 INFO L78 Accepts]: Start accepts. Automaton has 25624 states and 106771 transitions. Word has length 28 [2021-05-21 20:39:53,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:53,605 INFO L482 AbstractCegarLoop]: Abstraction has 25624 states and 106771 transitions. [2021-05-21 20:39:53,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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) [2021-05-21 20:39:53,605 INFO L276 IsEmpty]: Start isEmpty. Operand 25624 states and 106771 transitions. [2021-05-21 20:39:53,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:53,657 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:53,657 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:53,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-21 20:39:53,858 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:53,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:53,858 INFO L82 PathProgramCache]: Analyzing trace with hash -938235612, now seen corresponding path program 15 times [2021-05-21 20:39:53,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:53,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502090633] [2021-05-21 20:39:53,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:53,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:53,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:39:53,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:53,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502090633] [2021-05-21 20:39:53,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502090633] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:53,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537293343] [2021-05-21 20:39:53,884 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:53,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:39:53,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:53,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:53,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:53,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537293343] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:53,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:53,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-05-21 20:39:53,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314748683] [2021-05-21 20:39:53,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:39:53,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:53,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:39:53,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:39:53,990 INFO L87 Difference]: Start difference. First operand 25624 states and 106771 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-05-21 20:39:54,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:54,649 INFO L93 Difference]: Finished difference Result 32707 states and 131617 transitions. [2021-05-21 20:39:54,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:39:54,650 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 28 [2021-05-21 20:39:54,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:54,762 INFO L225 Difference]: With dead ends: 32707 [2021-05-21 20:39:54,762 INFO L226 Difference]: Without dead ends: 32682 [2021-05-21 20:39:54,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 106.9ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:39:54,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32682 states. [2021-05-21 20:39:55,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32682 to 25624. [2021-05-21 20:39:55,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25624 states, 25623 states have (on average 4.166530070639659) internal successors, (106759), 25623 states have internal predecessors, (106759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:55,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25624 states to 25624 states and 106759 transitions. [2021-05-21 20:39:55,288 INFO L78 Accepts]: Start accepts. Automaton has 25624 states and 106759 transitions. Word has length 28 [2021-05-21 20:39:55,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:55,289 INFO L482 AbstractCegarLoop]: Abstraction has 25624 states and 106759 transitions. [2021-05-21 20:39:55,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-05-21 20:39:55,289 INFO L276 IsEmpty]: Start isEmpty. Operand 25624 states and 106759 transitions. [2021-05-21 20:39:55,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:55,341 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:55,341 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:55,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-21 20:39:55,542 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:55,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:55,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1900039704, now seen corresponding path program 16 times [2021-05-21 20:39:55,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:55,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218656926] [2021-05-21 20:39:55,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:55,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:39:55,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:55,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218656926] [2021-05-21 20:39:55,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218656926] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:55,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349814389] [2021-05-21 20:39:55,564 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:55,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:39:55,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:55,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:55,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:55,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:55,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349814389] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:55,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:55,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-05-21 20:39:55,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983094300] [2021-05-21 20:39:55,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:39:55,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:55,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:39:55,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:39:55,968 INFO L87 Difference]: Start difference. First operand 25624 states and 106759 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:56,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:56,611 INFO L93 Difference]: Finished difference Result 38112 states and 153561 transitions. [2021-05-21 20:39:56,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:39:56,611 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:39:56,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:56,709 INFO L225 Difference]: With dead ends: 38112 [2021-05-21 20:39:56,709 INFO L226 Difference]: Without dead ends: 38112 [2021-05-21 20:39:56,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 148.9ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-05-21 20:39:56,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38112 states. [2021-05-21 20:39:57,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38112 to 25794. [2021-05-21 20:39:57,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25794 states, 25793 states have (on average 4.1656263327259335) internal successors, (107444), 25793 states have internal predecessors, (107444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:57,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25794 states to 25794 states and 107444 transitions. [2021-05-21 20:39:57,512 INFO L78 Accepts]: Start accepts. Automaton has 25794 states and 107444 transitions. Word has length 28 [2021-05-21 20:39:57,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:57,513 INFO L482 AbstractCegarLoop]: Abstraction has 25794 states and 107444 transitions. [2021-05-21 20:39:57,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:57,513 INFO L276 IsEmpty]: Start isEmpty. Operand 25794 states and 107444 transitions. [2021-05-21 20:39:57,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:57,566 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:57,567 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:57,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-21 20:39:57,768 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:57,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:57,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1871875393, now seen corresponding path program 17 times [2021-05-21 20:39:57,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:57,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149391748] [2021-05-21 20:39:57,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:57,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:57,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:39:57,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:57,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149391748] [2021-05-21 20:39:57,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149391748] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:57,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922271079] [2021-05-21 20:39:57,797 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:57,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:39:57,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:57,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:57,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:57,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922271079] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:57,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:57,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-05-21 20:39:57,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397901851] [2021-05-21 20:39:57,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:39:57,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:57,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:39:57,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:39:57,919 INFO L87 Difference]: Start difference. First operand 25794 states and 107444 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-05-21 20:39:58,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:58,421 INFO L93 Difference]: Finished difference Result 39804 states and 156168 transitions. [2021-05-21 20:39:58,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:39:58,422 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 28 [2021-05-21 20:39:58,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:58,531 INFO L225 Difference]: With dead ends: 39804 [2021-05-21 20:39:58,531 INFO L226 Difference]: Without dead ends: 39780 [2021-05-21 20:39:58,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 146.8ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:39:58,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39780 states. [2021-05-21 20:39:59,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39780 to 25794. [2021-05-21 20:39:59,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25794 states, 25793 states have (on average 4.165161090218276) internal successors, (107432), 25793 states have internal predecessors, (107432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:59,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25794 states to 25794 states and 107432 transitions. [2021-05-21 20:39:59,400 INFO L78 Accepts]: Start accepts. Automaton has 25794 states and 107432 transitions. Word has length 28 [2021-05-21 20:39:59,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:59,400 INFO L482 AbstractCegarLoop]: Abstraction has 25794 states and 107432 transitions. [2021-05-21 20:39:59,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-05-21 20:39:59,400 INFO L276 IsEmpty]: Start isEmpty. Operand 25794 states and 107432 transitions. [2021-05-21 20:39:59,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:39:59,451 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:59,451 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:59,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:59,652 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:59,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:59,652 INFO L82 PathProgramCache]: Analyzing trace with hash 376841606, now seen corresponding path program 18 times [2021-05-21 20:39:59,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:59,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249477750] [2021-05-21 20:39:59,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:59,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:59,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:59,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:59,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249477750] [2021-05-21 20:39:59,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249477750] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:59,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884555576] [2021-05-21 20:39:59,676 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:59,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:39:59,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:59,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:39:59,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:59,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884555576] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:59,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:59,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-05-21 20:39:59,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50080979] [2021-05-21 20:39:59,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:39:59,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:59,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:39:59,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:39:59,769 INFO L87 Difference]: Start difference. First operand 25794 states and 107432 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:00,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:00,798 INFO L93 Difference]: Finished difference Result 48289 states and 195910 transitions. [2021-05-21 20:40:00,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 20:40:00,798 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:40:00,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:00,924 INFO L225 Difference]: With dead ends: 48289 [2021-05-21 20:40:00,924 INFO L226 Difference]: Without dead ends: 48289 [2021-05-21 20:40:00,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 198.3ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:40:00,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48289 states. [2021-05-21 20:40:01,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48289 to 25964. [2021-05-21 20:40:01,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25964 states, 25963 states have (on average 4.164272233563148) internal successors, (108117), 25963 states have internal predecessors, (108117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:01,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25964 states to 25964 states and 108117 transitions. [2021-05-21 20:40:01,785 INFO L78 Accepts]: Start accepts. Automaton has 25964 states and 108117 transitions. Word has length 28 [2021-05-21 20:40:01,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:01,785 INFO L482 AbstractCegarLoop]: Abstraction has 25964 states and 108117 transitions. [2021-05-21 20:40:01,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:01,785 INFO L276 IsEmpty]: Start isEmpty. Operand 25964 states and 108117 transitions. [2021-05-21 20:40:01,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:40:01,839 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:01,839 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:40:02,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-21 20:40:02,040 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:40:02,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:02,041 INFO L82 PathProgramCache]: Analyzing trace with hash 2144394371, now seen corresponding path program 19 times [2021-05-21 20:40:02,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:02,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578040916] [2021-05-21 20:40:02,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:02,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:02,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:02,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:02,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578040916] [2021-05-21 20:40:02,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578040916] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:02,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503083182] [2021-05-21 20:40:02,071 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:02,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:02,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:40:02,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:02,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:02,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503083182] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:02,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:02,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-05-21 20:40:02,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108350193] [2021-05-21 20:40:02,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:40:02,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:02,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:40:02,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:40:02,187 INFO L87 Difference]: Start difference. First operand 25964 states and 108117 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) [2021-05-21 20:40:03,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:03,238 INFO L93 Difference]: Finished difference Result 47194 states and 183148 transitions. [2021-05-21 20:40:03,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 20:40:03,238 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 28 [2021-05-21 20:40:03,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:03,396 INFO L225 Difference]: With dead ends: 47194 [2021-05-21 20:40:03,396 INFO L226 Difference]: Without dead ends: 47098 [2021-05-21 20:40:03,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 263.5ms TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:40:03,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47098 states. [2021-05-21 20:40:04,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47098 to 25964. [2021-05-21 20:40:04,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25964 states, 25963 states have (on average 4.16381003736086) internal successors, (108105), 25963 states have internal predecessors, (108105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:04,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25964 states to 25964 states and 108105 transitions. [2021-05-21 20:40:04,390 INFO L78 Accepts]: Start accepts. Automaton has 25964 states and 108105 transitions. Word has length 28 [2021-05-21 20:40:04,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:04,390 INFO L482 AbstractCegarLoop]: Abstraction has 25964 states and 108105 transitions. [2021-05-21 20:40:04,390 INFO L483 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) [2021-05-21 20:40:04,390 INFO L276 IsEmpty]: Start isEmpty. Operand 25964 states and 108105 transitions. [2021-05-21 20:40:04,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:40:04,753 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:04,753 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:40:04,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:04,973 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:40:04,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:04,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1673405932, now seen corresponding path program 20 times [2021-05-21 20:40:04,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:04,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936630106] [2021-05-21 20:40:04,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:04,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:05,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:05,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:05,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936630106] [2021-05-21 20:40:05,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936630106] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:05,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378078711] [2021-05-21 20:40:05,010 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:05,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:40:05,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:40:05,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:40:05,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:05,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378078711] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:05,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:05,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:40:05,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26048478] [2021-05-21 20:40:05,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:40:05,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:05,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:40:05,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:40:05,108 INFO L87 Difference]: Start difference. First operand 25964 states and 108105 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:06,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:06,105 INFO L93 Difference]: Finished difference Result 38914 states and 158503 transitions. [2021-05-21 20:40:06,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 20:40:06,105 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:40:06,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:06,214 INFO L225 Difference]: With dead ends: 38914 [2021-05-21 20:40:06,215 INFO L226 Difference]: Without dead ends: 38914 [2021-05-21 20:40:06,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 346.1ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 20:40:06,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38914 states. [2021-05-21 20:40:06,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38914 to 26620. [2021-05-21 20:40:06,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26620 states, 26619 states have (on average 4.1402381757391336) internal successors, (110209), 26619 states have internal predecessors, (110209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:07,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26620 states to 26620 states and 110209 transitions. [2021-05-21 20:40:07,055 INFO L78 Accepts]: Start accepts. Automaton has 26620 states and 110209 transitions. Word has length 28 [2021-05-21 20:40:07,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:07,055 INFO L482 AbstractCegarLoop]: Abstraction has 26620 states and 110209 transitions. [2021-05-21 20:40:07,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:07,055 INFO L276 IsEmpty]: Start isEmpty. Operand 26620 states and 110209 transitions. [2021-05-21 20:40:07,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:40:07,111 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:07,111 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:40:07,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:07,312 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:40:07,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:07,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1786221247, now seen corresponding path program 21 times [2021-05-21 20:40:07,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:07,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098007762] [2021-05-21 20:40:07,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:07,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:07,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:07,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:07,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098007762] [2021-05-21 20:40:07,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098007762] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:07,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5507233] [2021-05-21 20:40:07,345 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:07,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:40:07,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:40:07,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:40:07,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:07,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:07,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5507233] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:07,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:07,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:40:07,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011968743] [2021-05-21 20:40:07,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:40:07,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:07,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:40:07,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:40:07,438 INFO L87 Difference]: Start difference. First operand 26620 states and 110209 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:08,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:08,042 INFO L93 Difference]: Finished difference Result 41610 states and 161108 transitions. [2021-05-21 20:40:08,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 20:40:08,043 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:40:08,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:08,413 INFO L225 Difference]: With dead ends: 41610 [2021-05-21 20:40:08,413 INFO L226 Difference]: Without dead ends: 41514 [2021-05-21 20:40:08,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 230.7ms TimeCoverageRelationStatistics Valid=198, Invalid=732, Unknown=0, NotChecked=0, Total=930 [2021-05-21 20:40:08,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41514 states. [2021-05-21 20:40:08,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41514 to 27244. [2021-05-21 20:40:08,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27244 states, 27243 states have (on average 4.125646955181147) internal successors, (112395), 27243 states have internal predecessors, (112395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:09,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27244 states to 27244 states and 112395 transitions. [2021-05-21 20:40:09,052 INFO L78 Accepts]: Start accepts. Automaton has 27244 states and 112395 transitions. Word has length 28 [2021-05-21 20:40:09,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:09,052 INFO L482 AbstractCegarLoop]: Abstraction has 27244 states and 112395 transitions. [2021-05-21 20:40:09,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:09,052 INFO L276 IsEmpty]: Start isEmpty. Operand 27244 states and 112395 transitions. [2021-05-21 20:40:09,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:40:09,106 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:09,106 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:40:09,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-21 20:40:09,306 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:40:09,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:09,307 INFO L82 PathProgramCache]: Analyzing trace with hash -703123463, now seen corresponding path program 22 times [2021-05-21 20:40:09,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:09,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335033212] [2021-05-21 20:40:09,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:09,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:09,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:09,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335033212] [2021-05-21 20:40:09,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335033212] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:09,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719695042] [2021-05-21 20:40:09,332 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:09,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:40:09,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:40:09,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:40:09,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:09,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:09,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719695042] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:09,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:09,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-21 20:40:09,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419523759] [2021-05-21 20:40:09,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:40:09,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:09,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:40:09,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:40:09,676 INFO L87 Difference]: Start difference. First operand 27244 states and 112395 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:10,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:10,506 INFO L93 Difference]: Finished difference Result 48209 states and 191672 transitions. [2021-05-21 20:40:10,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 20:40:10,506 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 20:40:10,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:10,647 INFO L225 Difference]: With dead ends: 48209 [2021-05-21 20:40:10,647 INFO L226 Difference]: Without dead ends: 48209 [2021-05-21 20:40:10,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 239.4ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:40:10,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48209 states. [2021-05-21 20:40:11,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48209 to 26904. [2021-05-21 20:40:11,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26904 states, 26903 states have (on average 4.114225179348028) internal successors, (110685), 26903 states have internal predecessors, (110685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:11,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26904 states to 26904 states and 110685 transitions. [2021-05-21 20:40:11,609 INFO L78 Accepts]: Start accepts. Automaton has 26904 states and 110685 transitions. Word has length 28 [2021-05-21 20:40:11,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:11,609 INFO L482 AbstractCegarLoop]: Abstraction has 26904 states and 110685 transitions. [2021-05-21 20:40:11,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:11,609 INFO L276 IsEmpty]: Start isEmpty. Operand 26904 states and 110685 transitions. [2021-05-21 20:40:11,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 20:40:11,661 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:11,661 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:40:11,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:11,862 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:40:11,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:11,862 INFO L82 PathProgramCache]: Analyzing trace with hash 865070776, now seen corresponding path program 23 times [2021-05-21 20:40:11,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:11,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503553979] [2021-05-21 20:40:11,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:11,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:11,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:11,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:11,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503553979] [2021-05-21 20:40:11,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503553979] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:11,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758175904] [2021-05-21 20:40:11,891 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:11,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:40:11,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:40:11,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:40:11,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:12,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:12,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758175904] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:12,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:12,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-21 20:40:12,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418000437] [2021-05-21 20:40:12,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:40:12,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:12,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:40:12,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:40:12,009 INFO L87 Difference]: Start difference. First operand 26904 states and 110685 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-05-21 20:40:12,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:12,579 INFO L93 Difference]: Finished difference Result 35478 states and 139558 transitions. [2021-05-21 20:40:12,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 20:40:12,580 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 28 [2021-05-21 20:40:12,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:12,673 INFO L225 Difference]: With dead ends: 35478 [2021-05-21 20:40:12,674 INFO L226 Difference]: Without dead ends: 35428 [2021-05-21 20:40:12,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 156.5ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:40:12,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35428 states. [2021-05-21 20:40:13,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35428 to 26239. [2021-05-21 20:40:13,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26239 states, 26238 states have (on average 4.115595700891836) internal successors, (107985), 26238 states have internal predecessors, (107985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:13,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26239 states to 26239 states and 107985 transitions. [2021-05-21 20:40:13,501 INFO L78 Accepts]: Start accepts. Automaton has 26239 states and 107985 transitions. Word has length 28 [2021-05-21 20:40:13,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:13,501 INFO L482 AbstractCegarLoop]: Abstraction has 26239 states and 107985 transitions. [2021-05-21 20:40:13,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-05-21 20:40:13,501 INFO L276 IsEmpty]: Start isEmpty. Operand 26239 states and 107985 transitions. [2021-05-21 20:40:13,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 20:40:13,559 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:13,559 INFO L521 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] [2021-05-21 20:40:13,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-05-21 20:40:13,759 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:40:13,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:13,759 INFO L82 PathProgramCache]: Analyzing trace with hash 245948648, now seen corresponding path program 24 times [2021-05-21 20:40:13,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:13,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588858751] [2021-05-21 20:40:13,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:13,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:13,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:13,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:13,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588858751] [2021-05-21 20:40:13,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588858751] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:13,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134681601] [2021-05-21 20:40:13,824 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:13,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:40:13,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:40:13,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 20:40:13,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:14,180 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:14,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134681601] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:14,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:14,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 10 [2021-05-21 20:40:14,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176911710] [2021-05-21 20:40:14,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:40:14,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:14,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:40:14,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:40:14,181 INFO L87 Difference]: Start difference. First operand 26239 states and 107985 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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) [2021-05-21 20:40:15,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:15,222 INFO L93 Difference]: Finished difference Result 29258 states and 119012 transitions. [2021-05-21 20:40:15,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:40:15,223 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 31 [2021-05-21 20:40:15,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:15,307 INFO L225 Difference]: With dead ends: 29258 [2021-05-21 20:40:15,307 INFO L226 Difference]: Without dead ends: 29122 [2021-05-21 20:40:15,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 125.7ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:40:15,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29122 states. [2021-05-21 20:40:15,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29122 to 26985. [2021-05-21 20:40:15,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26985 states, 26984 states have (on average 4.111139934776164) internal successors, (110935), 26984 states have internal predecessors, (110935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:16,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26985 states to 26985 states and 110935 transitions. [2021-05-21 20:40:16,128 INFO L78 Accepts]: Start accepts. Automaton has 26985 states and 110935 transitions. Word has length 31 [2021-05-21 20:40:16,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:16,129 INFO L482 AbstractCegarLoop]: Abstraction has 26985 states and 110935 transitions. [2021-05-21 20:40:16,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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) [2021-05-21 20:40:16,129 INFO L276 IsEmpty]: Start isEmpty. Operand 26985 states and 110935 transitions. [2021-05-21 20:40:16,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 20:40:16,203 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:16,204 INFO L521 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] [2021-05-21 20:40:16,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:16,404 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:40:16,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:16,405 INFO L82 PathProgramCache]: Analyzing trace with hash -888811328, now seen corresponding path program 25 times [2021-05-21 20:40:16,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:16,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382090473] [2021-05-21 20:40:16,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:16,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:16,468 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:40:16,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:16,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382090473] [2021-05-21 20:40:16,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382090473] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:16,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414547305] [2021-05-21 20:40:16,469 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:16,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:16,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 20:40:16,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:16,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:16,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414547305] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:16,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:16,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 11 [2021-05-21 20:40:16,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892358678] [2021-05-21 20:40:16,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:40:16,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:16,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:40:16,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:40:16,825 INFO L87 Difference]: Start difference. First operand 26985 states and 110935 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:17,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:17,504 INFO L93 Difference]: Finished difference Result 30378 states and 123415 transitions. [2021-05-21 20:40:17,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:40:17,504 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 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 [2021-05-21 20:40:17,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:17,588 INFO L225 Difference]: With dead ends: 30378 [2021-05-21 20:40:17,588 INFO L226 Difference]: Without dead ends: 30174 [2021-05-21 20:40:17,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 196.0ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:40:17,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30174 states. [2021-05-21 20:40:18,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30174 to 27681. [2021-05-21 20:40:18,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27681 states, 27680 states have (on average 4.11296965317919) internal successors, (113847), 27680 states have internal predecessors, (113847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:18,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27681 states to 27681 states and 113847 transitions. [2021-05-21 20:40:18,356 INFO L78 Accepts]: Start accepts. Automaton has 27681 states and 113847 transitions. Word has length 31 [2021-05-21 20:40:18,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:18,356 INFO L482 AbstractCegarLoop]: Abstraction has 27681 states and 113847 transitions. [2021-05-21 20:40:18,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:18,356 INFO L276 IsEmpty]: Start isEmpty. Operand 27681 states and 113847 transitions. [2021-05-21 20:40:18,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 20:40:18,410 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:18,410 INFO L521 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] [2021-05-21 20:40:18,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-05-21 20:40:18,611 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:40:18,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:18,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1735840200, now seen corresponding path program 26 times [2021-05-21 20:40:18,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:18,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681280652] [2021-05-21 20:40:18,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:18,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:18,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:40:18,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:18,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681280652] [2021-05-21 20:40:18,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681280652] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:18,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315400834] [2021-05-21 20:40:18,671 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:18,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:40:18,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:40:18,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 20:40:18,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:18,985 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-21 20:40:19,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-21 20:40:19,203 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Possible infinite loop detected aux_div_aux_div_aux_mod_x1_24_53_119 already exists at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:585) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:573) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:76) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:451) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:212) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:585) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:573) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:76) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:451) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:408) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.findBestReplacementSbr(DualJunctionDer.java:312) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.tryToEliminateSbr(DualJunctionDer.java:328) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:231) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:182) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:149) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminate(DualJunctionDer.java:127) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:869) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:835) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:753) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:384) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$LiveVariablesPostprocessorForward.postprocess(TraceCheckSpWp.java:539) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:371) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-21 20:40:19,208 INFO L168 Benchmark]: Toolchain (without parser) took 82534.27 ms. Allocated memory was 354.4 MB in the beginning and 13.6 GB in the end (delta: 13.3 GB). Free memory was 334.0 MB in the beginning and 9.8 GB in the end (delta: -9.5 GB). Peak memory consumption was 3.8 GB. Max. memory is 16.0 GB. [2021-05-21 20:40:19,208 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 354.4 MB. Free memory was 335.1 MB in the beginning and 335.0 MB in the end (delta: 65.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 20:40:19,208 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.80 ms. Allocated memory is still 354.4 MB. Free memory was 333.9 MB in the beginning and 332.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 20:40:19,208 INFO L168 Benchmark]: Boogie Preprocessor took 15.56 ms. Allocated memory is still 354.4 MB. Free memory was 332.4 MB in the beginning and 331.4 MB in the end (delta: 960.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 20:40:19,208 INFO L168 Benchmark]: RCFGBuilder took 236.61 ms. Allocated memory is still 354.4 MB. Free memory was 331.4 MB in the beginning and 319.9 MB in the end (delta: 11.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-05-21 20:40:19,208 INFO L168 Benchmark]: TraceAbstraction took 82248.83 ms. Allocated memory was 354.4 MB in the beginning and 13.6 GB in the end (delta: 13.3 GB). Free memory was 319.4 MB in the beginning and 9.8 GB in the end (delta: -9.5 GB). Peak memory consumption was 3.8 GB. Max. memory is 16.0 GB. [2021-05-21 20:40:19,208 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 0.16 ms. Allocated memory is still 354.4 MB. Free memory was 335.1 MB in the beginning and 335.0 MB in the end (delta: 65.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 27.80 ms. Allocated memory is still 354.4 MB. Free memory was 333.9 MB in the beginning and 332.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.56 ms. Allocated memory is still 354.4 MB. Free memory was 332.4 MB in the beginning and 331.4 MB in the end (delta: 960.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 236.61 ms. Allocated memory is still 354.4 MB. Free memory was 331.4 MB in the beginning and 319.9 MB in the end (delta: 11.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 82248.83 ms. Allocated memory was 354.4 MB in the beginning and 13.6 GB in the end (delta: 13.3 GB). Free memory was 319.4 MB in the beginning and 9.8 GB in the end (delta: -9.5 GB). Peak memory consumption was 3.8 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Possible infinite loop detected aux_div_aux_div_aux_mod_x1_24_53_119 already exists de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Possible infinite loop detected aux_div_aux_div_aux_mod_x1_24_53_119 already exists: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:198) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...