/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array-hom.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 21:54:42,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 21:54:42,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 21:54:42,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 21:54:42,241 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-12 21:54:42,277 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 21:54:42,277 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 21:54:42,277 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 21:54:42,277 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 21:54:42,278 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 21:54:42,278 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 21:54:42,278 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 21:54:42,279 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 21:54:42,279 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 21:54:42,279 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 21:54:42,279 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 21:54:42,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 21:54:42,279 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 21:54:42,280 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 21:54:42,280 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 21:54:42,280 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 21:54:42,280 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 21:54:42,280 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 21:54:42,280 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 21:54:42,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 21:54:42,281 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 21:54:42,281 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 21:54:42,281 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 21:54:42,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 21:54:42,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 21:54:42,281 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 21:54:42,281 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 21:54:42,282 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 21:54:42,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 21:54:42,282 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 21:54:42,282 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 21:54:42,282 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 21:54:42,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 21:54:42,610 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 21:54:42,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 21:54:42,612 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 21:54:42,613 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 21:54:42,614 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array-hom.wvr.bpl [2021-06-12 21:54:42,614 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array-hom.wvr.bpl' [2021-06-12 21:54:42,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 21:54:42,647 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 21:54:42,648 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 21:54:42,648 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 21:54:42,648 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 21:54:42,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:54:42" (1/1) ... [2021-06-12 21:54:42,662 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:54:42" (1/1) ... [2021-06-12 21:54:42,667 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 21:54:42,669 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 21:54:42,669 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 21:54:42,669 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 21:54:42,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:54:42" (1/1) ... [2021-06-12 21:54:42,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:54:42" (1/1) ... [2021-06-12 21:54:42,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:54:42" (1/1) ... [2021-06-12 21:54:42,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:54:42" (1/1) ... [2021-06-12 21:54:42,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:54:42" (1/1) ... [2021-06-12 21:54:42,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:54:42" (1/1) ... [2021-06-12 21:54:42,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:54:42" (1/1) ... [2021-06-12 21:54:42,683 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 21:54:42,683 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 21:54:42,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 21:54:42,683 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 21:54:42,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:54:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 21:54:42,745 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 21:54:42,745 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 21:54:42,745 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 21:54:42,746 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 21:54:42,746 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 21:54:42,746 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 21:54:42,746 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 21:54:42,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 21:54:42,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 21:54:42,746 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 21:54:42,746 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 21:54:42,747 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 21:54:42,747 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 21:54:42,938 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 21:54:42,938 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 21:54:42,940 INFO L202 PluginConnector]: Adding new model max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 09:54:42 BoogieIcfgContainer [2021-06-12 21:54:42,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 21:54:42,942 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 21:54:42,942 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 21:54:42,951 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 21:54:42,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:54:42" (1/2) ... [2021-06-12 21:54:42,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7769fb10 and model type max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 09:54:42, skipping insertion in model container [2021-06-12 21:54:42,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 09:54:42" (2/2) ... [2021-06-12 21:54:42,953 INFO L111 eAbstractionObserver]: Analyzing ICFG max-array-hom.wvr.bpl [2021-06-12 21:54:42,957 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 21:54:42,958 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 21:54:42,958 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 21:54:42,958 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 21:54:42,988 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-12 21:54:43,006 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-12 21:54:43,022 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 21:54:43,022 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 21:54:43,023 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 21:54:43,023 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 21:54:43,023 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 21:54:43,023 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 21:54:43,023 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 21:54:43,023 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 21:54:43,031 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-06-12 21:54:43,051 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:43,054 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:43,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 21:54:43,062 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:43,062 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:43,063 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:43,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:43,067 INFO L82 PathProgramCache]: Analyzing trace with hash -986458276, now seen corresponding path program 1 times [2021-06-12 21:54:43,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:43,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842176177] [2021-06-12 21:54:43,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:43,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:43,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:43,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:43,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842176177] [2021-06-12 21:54:43,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842176177] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:54:43,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:54:43,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 21:54:43,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544052080] [2021-06-12 21:54:43,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 21:54:43,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:43,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 21:54:43,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:54:43,349 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 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 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:43,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:43,382 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-06-12 21:54:43,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 21:54:43,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 21:54:43,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:43,394 INFO L225 Difference]: With dead ends: 217 [2021-06-12 21:54:43,394 INFO L226 Difference]: Without dead ends: 202 [2021-06-12 21:54:43,395 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:54:43,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-12 21:54:43,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-06-12 21:54:43,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:43,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-06-12 21:54:43,440 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-06-12 21:54:43,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:43,441 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-06-12 21:54:43,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:43,441 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-06-12 21:54:43,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 21:54:43,443 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:43,443 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:43,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 21:54:43,444 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:43,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:43,445 INFO L82 PathProgramCache]: Analyzing trace with hash -433058596, now seen corresponding path program 1 times [2021-06-12 21:54:43,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:43,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903244364] [2021-06-12 21:54:43,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:43,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:43,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:54:43,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:43,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903244364] [2021-06-12 21:54:43,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903244364] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:54:43,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:54:43,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 21:54:43,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758288232] [2021-06-12 21:54:43,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 21:54:43,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:43,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 21:54:43,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 21:54:43,517 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:43,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:43,573 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-06-12 21:54:43,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 21:54:43,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 21:54:43,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:43,575 INFO L225 Difference]: With dead ends: 158 [2021-06-12 21:54:43,575 INFO L226 Difference]: Without dead ends: 158 [2021-06-12 21:54:43,576 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 21:54:43,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-12 21:54:43,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-06-12 21:54:43,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:43,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-06-12 21:54:43,589 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-06-12 21:54:43,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:43,590 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-06-12 21:54:43,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:43,590 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-06-12 21:54:43,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 21:54:43,591 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:43,592 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:43,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 21:54:43,592 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:43,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:43,593 INFO L82 PathProgramCache]: Analyzing trace with hash 275548602, now seen corresponding path program 1 times [2021-06-12 21:54:43,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:43,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067305655] [2021-06-12 21:54:43,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:43,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:54:43,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:43,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067305655] [2021-06-12 21:54:43,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067305655] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:54:43,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:54:43,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 21:54:43,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750286136] [2021-06-12 21:54:43,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 21:54:43,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:43,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 21:54:43,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 21:54:43,635 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:43,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:43,671 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-06-12 21:54:43,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 21:54:43,672 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 21:54:43,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:43,674 INFO L225 Difference]: With dead ends: 183 [2021-06-12 21:54:43,674 INFO L226 Difference]: Without dead ends: 183 [2021-06-12 21:54:43,674 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 21:54:43,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-12 21:54:43,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-06-12 21:54:43,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:43,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-06-12 21:54:43,690 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-06-12 21:54:43,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:43,690 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-06-12 21:54:43,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:43,691 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-06-12 21:54:43,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:54:43,692 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:43,692 INFO L472 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] [2021-06-12 21:54:43,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 21:54:43,693 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:43,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:43,693 INFO L82 PathProgramCache]: Analyzing trace with hash -483303622, now seen corresponding path program 1 times [2021-06-12 21:54:43,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:43,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046717605] [2021-06-12 21:54:43,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:43,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:44,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:44,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:44,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046717605] [2021-06-12 21:54:44,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046717605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:44,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988494814] [2021-06-12 21:54:44,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:44,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:44,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:54:44,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:44,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:54:44,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:44,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-12 21:54:44,505 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:44,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-12 21:54:44,510 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:44,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:44,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:54:44,528 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:103, output treesize:21 [2021-06-12 21:54:44,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:44,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988494814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:44,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:44,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 21:54:44,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268073287] [2021-06-12 21:54:44,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:54:44,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:44,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:54:44,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:54:44,572 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-06-12 21:54:44,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:44,852 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-06-12 21:54:44,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 21:54:44,852 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 22 [2021-06-12 21:54:44,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:44,855 INFO L225 Difference]: With dead ends: 330 [2021-06-12 21:54:44,855 INFO L226 Difference]: Without dead ends: 315 [2021-06-12 21:54:44,855 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 456.2ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:54:44,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-12 21:54:44,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-06-12 21:54:44,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:44,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-06-12 21:54:44,872 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-06-12 21:54:44,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:44,872 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-06-12 21:54:44,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-06-12 21:54:44,873 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-06-12 21:54:44,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:54:44,875 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:44,875 INFO L472 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] [2021-06-12 21:54:45,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:45,093 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:45,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:45,094 INFO L82 PathProgramCache]: Analyzing trace with hash -651112714, now seen corresponding path program 2 times [2021-06-12 21:54:45,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:45,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46104185] [2021-06-12 21:54:45,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:45,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:45,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:45,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46104185] [2021-06-12 21:54:45,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46104185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:45,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566972213] [2021-06-12 21:54:45,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:45,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:54:45,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:45,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:54:45,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:45,796 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:54:45,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-06-12 21:54:45,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:45,809 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:54:45,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-06-12 21:54:45,812 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:45,822 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:45,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 21:54:45,833 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:45,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:45,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 21:54:45,844 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:45,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:45,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 21:54:45,905 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:125, output treesize:83 [2021-06-12 21:54:46,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:46,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566972213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:46,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:46,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-12 21:54:46,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191274406] [2021-06-12 21:54:46,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 21:54:46,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:46,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 21:54:46,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 21:54:46,042 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:46,471 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-06-12 21:54:46,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:46,657 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-06-12 21:54:46,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 21:54:46,657 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 21:54:46,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:46,660 INFO L225 Difference]: With dead ends: 374 [2021-06-12 21:54:46,660 INFO L226 Difference]: Without dead ends: 359 [2021-06-12 21:54:46,660 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 837.0ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:54:46,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-12 21:54:46,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-06-12 21:54:46,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:46,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-06-12 21:54:46,671 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-06-12 21:54:46,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:46,672 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-06-12 21:54:46,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:46,672 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-06-12 21:54:46,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:54:46,674 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:46,674 INFO L472 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] [2021-06-12 21:54:46,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:46,897 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:46,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:46,897 INFO L82 PathProgramCache]: Analyzing trace with hash -352339266, now seen corresponding path program 3 times [2021-06-12 21:54:46,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:46,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23386991] [2021-06-12 21:54:46,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:46,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:47,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:47,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:47,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23386991] [2021-06-12 21:54:47,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23386991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:47,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090825450] [2021-06-12 21:54:47,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:47,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 21:54:47,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:47,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:54:47,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:47,229 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 21:54:47,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:47,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-12 21:54:47,234 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:47,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-12 21:54:47,238 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:47,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:54:47,241 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:47,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-12 21:54:47,245 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:47,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:54:47,249 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:47,271 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-06-12 21:54:47,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:54:47,272 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:145, output treesize:21 [2021-06-12 21:54:47,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:47,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090825450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:47,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:47,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 21:54:47,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540537358] [2021-06-12 21:54:47,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:54:47,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:47,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:54:47,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:54:47,314 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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) [2021-06-12 21:54:47,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:47,488 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-06-12 21:54:47,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 21:54:47,488 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 22 [2021-06-12 21:54:47,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:47,490 INFO L225 Difference]: With dead ends: 296 [2021-06-12 21:54:47,490 INFO L226 Difference]: Without dead ends: 281 [2021-06-12 21:54:47,491 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 288.3ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:54:47,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-12 21:54:47,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-06-12 21:54:47,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:47,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-06-12 21:54:47,502 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-06-12 21:54:47,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:47,502 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-06-12 21:54:47,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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) [2021-06-12 21:54:47,503 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-06-12 21:54:47,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:54:47,507 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:47,507 INFO L472 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] [2021-06-12 21:54:47,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-12 21:54:47,729 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:47,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:47,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1218486334, now seen corresponding path program 4 times [2021-06-12 21:54:47,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:47,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750382222] [2021-06-12 21:54:47,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:47,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:47,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:47,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:47,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750382222] [2021-06-12 21:54:47,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750382222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:47,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981040418] [2021-06-12 21:54:47,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:47,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:54:47,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:47,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:54:47,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:48,184 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:54:48,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-06-12 21:54:48,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:48,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:48,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 21:54:48,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:48,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:48,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:48,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 21:54:48,285 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:48,295 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:54:48,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-06-12 21:54:48,297 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:48,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:48,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 21:54:48,366 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:83 [2021-06-12 21:54:48,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:48,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981040418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:48,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:48,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 21:54:48,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931283762] [2021-06-12 21:54:48,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:54:48,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:48,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:54:48,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:54:48,501 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:48,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:48,879 INFO L93 Difference]: Finished difference Result 409 states and 1185 transitions. [2021-06-12 21:54:48,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 21:54:48,880 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 21:54:48,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:48,882 INFO L225 Difference]: With dead ends: 409 [2021-06-12 21:54:48,882 INFO L226 Difference]: Without dead ends: 394 [2021-06-12 21:54:48,882 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 558.2ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:54:48,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-12 21:54:48,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 247. [2021-06-12 21:54:48,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:48,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-06-12 21:54:48,890 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-06-12 21:54:48,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:48,890 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-06-12 21:54:48,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:48,890 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-06-12 21:54:48,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:54:48,891 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:48,891 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:49,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:49,105 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:49,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:49,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1613936552, now seen corresponding path program 5 times [2021-06-12 21:54:49,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:49,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282969332] [2021-06-12 21:54:49,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:49,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:49,161 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:49,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:49,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282969332] [2021-06-12 21:54:49,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282969332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:49,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48950337] [2021-06-12 21:54:49,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:49,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:54:49,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:49,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:54:49,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:49,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:49,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48950337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:49,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:49,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 21:54:49,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329494328] [2021-06-12 21:54:49,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:54:49,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:49,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:54:49,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:54:49,296 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-12 21:54:49,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:49,724 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-06-12 21:54:49,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 21:54:49,725 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 24 [2021-06-12 21:54:49,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:49,728 INFO L225 Difference]: With dead ends: 619 [2021-06-12 21:54:49,728 INFO L226 Difference]: Without dead ends: 619 [2021-06-12 21:54:49,729 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 270.0ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:54:49,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-12 21:54:49,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-06-12 21:54:49,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:49,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-06-12 21:54:49,739 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-06-12 21:54:49,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:49,739 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-06-12 21:54:49,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-12 21:54:49,739 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-06-12 21:54:49,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:54:49,740 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:49,740 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:49,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-12 21:54:49,957 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:49,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:49,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1704711900, now seen corresponding path program 6 times [2021-06-12 21:54:49,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:49,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797208630] [2021-06-12 21:54:49,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:49,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:50,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:50,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:50,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797208630] [2021-06-12 21:54:50,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797208630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:50,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998790040] [2021-06-12 21:54:50,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:50,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:54:50,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:50,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:54:50,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:50,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:50,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998790040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:50,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:50,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:54:50,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577423494] [2021-06-12 21:54:50,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:54:50,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:50,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:54:50,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:54:50,124 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-12 21:54:50,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:50,939 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-06-12 21:54:50,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 21:54:50,939 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-06-12 21:54:50,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:50,944 INFO L225 Difference]: With dead ends: 1078 [2021-06-12 21:54:50,944 INFO L226 Difference]: Without dead ends: 1078 [2021-06-12 21:54:50,945 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 506.9ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 21:54:50,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-12 21:54:50,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-06-12 21:54:50,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:50,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-06-12 21:54:50,957 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-06-12 21:54:50,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:50,958 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-06-12 21:54:50,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-12 21:54:50,958 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-06-12 21:54:50,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:54:50,959 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:50,959 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:51,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:51,173 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:51,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:51,173 INFO L82 PathProgramCache]: Analyzing trace with hash -2023303316, now seen corresponding path program 7 times [2021-06-12 21:54:51,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:51,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595544570] [2021-06-12 21:54:51,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:51,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:51,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595544570] [2021-06-12 21:54:51,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595544570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:51,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881334902] [2021-06-12 21:54:51,214 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:51,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:51,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:54:51,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:51,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:51,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881334902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:51,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:51,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:54:51,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802767655] [2021-06-12 21:54:51,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:54:51,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:51,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:54:51,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:54:51,361 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-12 21:54:51,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:51,994 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-06-12 21:54:51,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 21:54:51,995 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-06-12 21:54:51,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:51,999 INFO L225 Difference]: With dead ends: 951 [2021-06-12 21:54:51,999 INFO L226 Difference]: Without dead ends: 951 [2021-06-12 21:54:52,000 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 401.2ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 21:54:52,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-12 21:54:52,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-06-12 21:54:52,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:52,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-06-12 21:54:52,011 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-06-12 21:54:52,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:52,011 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-06-12 21:54:52,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-12 21:54:52,011 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-06-12 21:54:52,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:54:52,012 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:52,012 INFO L472 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] [2021-06-12 21:54:52,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:52,234 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:52,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:52,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1087164644, now seen corresponding path program 1 times [2021-06-12 21:54:52,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:52,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517954108] [2021-06-12 21:54:52,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:52,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:52,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:54:52,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:52,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517954108] [2021-06-12 21:54:52,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517954108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:52,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934122066] [2021-06-12 21:54:52,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:52,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:52,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 21:54:52,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:52,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:54:52,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934122066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:52,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:52,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 21:54:52,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502470908] [2021-06-12 21:54:52,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 21:54:52,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:52,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 21:54:52,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 21:54:52,381 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) 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) [2021-06-12 21:54:52,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:52,490 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-06-12 21:54:52,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 21:54:52,490 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) 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 24 [2021-06-12 21:54:52,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:52,493 INFO L225 Difference]: With dead ends: 669 [2021-06-12 21:54:52,493 INFO L226 Difference]: Without dead ends: 663 [2021-06-12 21:54:52,494 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:54:52,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-06-12 21:54:52,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-06-12 21:54:52,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:52,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-06-12 21:54:52,506 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-06-12 21:54:52,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:52,506 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-06-12 21:54:52,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) 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) [2021-06-12 21:54:52,507 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-06-12 21:54:52,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:54:52,508 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:52,508 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:52,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-12 21:54:52,721 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:52,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:52,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1524133352, now seen corresponding path program 8 times [2021-06-12 21:54:52,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:52,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829678917] [2021-06-12 21:54:52,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:52,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:52,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:52,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:52,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829678917] [2021-06-12 21:54:52,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829678917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:52,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139100008] [2021-06-12 21:54:52,759 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:52,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:54:52,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:52,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:54:52,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:52,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:52,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139100008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:52,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:52,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 21:54:52,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478634022] [2021-06-12 21:54:52,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:54:52,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:52,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:54:52,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:54:52,877 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:53,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:53,039 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-06-12 21:54:53,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:54:53,039 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:54:53,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:53,042 INFO L225 Difference]: With dead ends: 710 [2021-06-12 21:54:53,042 INFO L226 Difference]: Without dead ends: 672 [2021-06-12 21:54:53,042 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 143.8ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:54:53,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-12 21:54:53,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-06-12 21:54:53,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:53,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-06-12 21:54:53,055 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-06-12 21:54:53,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:53,055 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-06-12 21:54:53,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:53,055 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-06-12 21:54:53,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:54:53,056 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:53,056 INFO L472 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] [2021-06-12 21:54:53,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:53,277 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:53,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:53,277 INFO L82 PathProgramCache]: Analyzing trace with hash 2064876612, now seen corresponding path program 2 times [2021-06-12 21:54:53,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:53,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279095890] [2021-06-12 21:54:53,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:53,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:54:53,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:53,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279095890] [2021-06-12 21:54:53,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279095890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:53,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143280721] [2021-06-12 21:54:53,311 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:53,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:54:53,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:53,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 21:54:53,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:53,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:54:53,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143280721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:53,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:53,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 21:54:53,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931112135] [2021-06-12 21:54:53,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 21:54:53,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:53,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 21:54:53,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 21:54:53,398 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) 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) [2021-06-12 21:54:53,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:53,502 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-06-12 21:54:53,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 21:54:53,503 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) 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 24 [2021-06-12 21:54:53,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:53,507 INFO L225 Difference]: With dead ends: 830 [2021-06-12 21:54:53,507 INFO L226 Difference]: Without dead ends: 830 [2021-06-12 21:54:53,507 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:54:53,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-12 21:54:53,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-06-12 21:54:53,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:53,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-06-12 21:54:53,521 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-06-12 21:54:53,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:53,522 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-06-12 21:54:53,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) 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) [2021-06-12 21:54:53,522 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-06-12 21:54:53,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:54:53,523 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:53,523 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:53,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-12 21:54:53,746 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:53,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:53,756 INFO L82 PathProgramCache]: Analyzing trace with hash 718195046, now seen corresponding path program 9 times [2021-06-12 21:54:53,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:53,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408761855] [2021-06-12 21:54:53,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:53,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:53,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:53,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:53,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408761855] [2021-06-12 21:54:53,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408761855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:53,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943093229] [2021-06-12 21:54:53,795 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:53,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:54:53,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:53,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:54:53,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:53,937 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:53,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943093229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:53,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:53,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 21:54:53,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448739871] [2021-06-12 21:54:53,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:54:53,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:53,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:54:53,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:54:53,939 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-06-12 21:54:54,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:54,253 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-06-12 21:54:54,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 21:54:54,253 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 24 [2021-06-12 21:54:54,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:54,258 INFO L225 Difference]: With dead ends: 1196 [2021-06-12 21:54:54,258 INFO L226 Difference]: Without dead ends: 1196 [2021-06-12 21:54:54,258 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 189.0ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:54:54,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-12 21:54:54,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-06-12 21:54:54,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:54,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-06-12 21:54:54,277 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-06-12 21:54:54,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:54,277 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-06-12 21:54:54,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-06-12 21:54:54,277 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-06-12 21:54:54,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:54:54,279 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:54,279 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:54,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-12 21:54:54,493 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:54,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:54,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1503109140, now seen corresponding path program 10 times [2021-06-12 21:54:54,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:54,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851904129] [2021-06-12 21:54:54,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:54,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:54,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:54,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851904129] [2021-06-12 21:54:54,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851904129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:54,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460563787] [2021-06-12 21:54:54,538 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:54,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:54:54,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:54,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:54:54,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:54,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:54,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460563787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:54,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:54,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 21:54:54,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392915988] [2021-06-12 21:54:54,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:54:54,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:54,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:54:54,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:54:54,649 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-06-12 21:54:55,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:55,062 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-06-12 21:54:55,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 21:54:55,062 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 24 [2021-06-12 21:54:55,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:55,067 INFO L225 Difference]: With dead ends: 1492 [2021-06-12 21:54:55,067 INFO L226 Difference]: Without dead ends: 1492 [2021-06-12 21:54:55,068 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 256.8ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 21:54:55,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-06-12 21:54:55,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-06-12 21:54:55,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:55,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-06-12 21:54:55,088 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-06-12 21:54:55,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:55,088 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-06-12 21:54:55,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-06-12 21:54:55,088 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-06-12 21:54:55,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:54:55,090 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:55,090 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:55,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-12 21:54:55,310 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:55,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:55,310 INFO L82 PathProgramCache]: Analyzing trace with hash 420086484, now seen corresponding path program 11 times [2021-06-12 21:54:55,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:55,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031322637] [2021-06-12 21:54:55,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:55,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:55,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:55,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031322637] [2021-06-12 21:54:55,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031322637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:55,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639028143] [2021-06-12 21:54:55,351 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:55,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:54:55,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:55,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:54:55,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:55,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:55,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639028143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:55,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:55,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 21:54:55,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565265532] [2021-06-12 21:54:55,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:54:55,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:55,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:54:55,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:54:55,475 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:55,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:55,744 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-06-12 21:54:55,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:54:55,744 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:54:55,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:55,749 INFO L225 Difference]: With dead ends: 1258 [2021-06-12 21:54:55,749 INFO L226 Difference]: Without dead ends: 1248 [2021-06-12 21:54:55,750 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 195.9ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:54:55,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-12 21:54:55,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-06-12 21:54:55,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:55,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-06-12 21:54:55,769 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-06-12 21:54:55,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:55,769 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-06-12 21:54:55,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:55,769 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-06-12 21:54:55,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:54:55,771 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:55,771 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:55,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-06-12 21:54:55,985 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:55,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:55,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1891164602, now seen corresponding path program 12 times [2021-06-12 21:54:55,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:55,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556334188] [2021-06-12 21:54:55,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:55,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:56,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:56,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:56,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556334188] [2021-06-12 21:54:56,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556334188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:56,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334895275] [2021-06-12 21:54:56,027 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:56,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:54:56,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:56,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:54:56,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:56,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:56,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334895275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:56,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:56,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 21:54:56,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992313749] [2021-06-12 21:54:56,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:54:56,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:56,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:54:56,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:54:56,142 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-06-12 21:54:56,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:56,419 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-06-12 21:54:56,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:54:56,420 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 24 [2021-06-12 21:54:56,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:56,426 INFO L225 Difference]: With dead ends: 1329 [2021-06-12 21:54:56,426 INFO L226 Difference]: Without dead ends: 1329 [2021-06-12 21:54:56,426 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 180.2ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:54:56,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-12 21:54:56,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-06-12 21:54:56,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:56,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-06-12 21:54:56,446 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-06-12 21:54:56,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:56,446 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-06-12 21:54:56,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-06-12 21:54:56,446 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-06-12 21:54:56,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:54:56,448 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:56,448 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:56,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:56,671 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:56,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:56,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1458287998, now seen corresponding path program 13 times [2021-06-12 21:54:56,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:56,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408510365] [2021-06-12 21:54:56,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:56,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:56,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:56,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:56,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408510365] [2021-06-12 21:54:56,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408510365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:56,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532939872] [2021-06-12 21:54:56,722 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:56,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:56,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:54:56,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:56,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:56,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532939872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:56,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:56,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 21:54:56,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360044066] [2021-06-12 21:54:56,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:54:56,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:56,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:54:56,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:54:56,816 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-06-12 21:54:57,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:57,168 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-06-12 21:54:57,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 21:54:57,169 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 24 [2021-06-12 21:54:57,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:57,174 INFO L225 Difference]: With dead ends: 1548 [2021-06-12 21:54:57,174 INFO L226 Difference]: Without dead ends: 1544 [2021-06-12 21:54:57,174 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 211.5ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:54:57,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-12 21:54:57,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-06-12 21:54:57,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:57,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-06-12 21:54:57,197 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-06-12 21:54:57,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:57,197 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-06-12 21:54:57,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-06-12 21:54:57,197 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-06-12 21:54:57,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:54:57,199 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:57,199 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:57,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:57,413 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:57,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:57,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1186278808, now seen corresponding path program 14 times [2021-06-12 21:54:57,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:57,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105883595] [2021-06-12 21:54:57,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:57,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:57,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:57,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:57,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105883595] [2021-06-12 21:54:57,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105883595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:57,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956695804] [2021-06-12 21:54:57,452 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:57,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:54:57,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:57,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:54:57,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:57,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:57,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956695804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:57,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:57,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:54:57,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615380471] [2021-06-12 21:54:57,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:54:57,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:57,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:54:57,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:54:57,586 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-12 21:54:58,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:58,294 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-06-12 21:54:58,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 21:54:58,294 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-06-12 21:54:58,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:58,304 INFO L225 Difference]: With dead ends: 2734 [2021-06-12 21:54:58,304 INFO L226 Difference]: Without dead ends: 2734 [2021-06-12 21:54:58,305 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 435.6ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 21:54:58,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-06-12 21:54:58,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-06-12 21:54:58,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:58,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-06-12 21:54:58,340 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-06-12 21:54:58,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:58,340 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-06-12 21:54:58,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-12 21:54:58,340 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-06-12 21:54:58,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:54:58,342 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:58,342 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:58,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:58,557 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:58,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:58,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1753230888, now seen corresponding path program 15 times [2021-06-12 21:54:58,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:58,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515290698] [2021-06-12 21:54:58,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:58,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:58,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:58,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:58,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515290698] [2021-06-12 21:54:58,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515290698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:58,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072735134] [2021-06-12 21:54:58,598 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:58,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:54:58,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:58,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:54:58,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:58,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:58,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072735134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:58,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:58,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:54:58,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103018057] [2021-06-12 21:54:58,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:54:58,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:58,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:54:58,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:54:58,746 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-12 21:54:59,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:59,447 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-06-12 21:54:59,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 21:54:59,447 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-06-12 21:54:59,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:59,454 INFO L225 Difference]: With dead ends: 2693 [2021-06-12 21:54:59,454 INFO L226 Difference]: Without dead ends: 2693 [2021-06-12 21:54:59,455 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 455.4ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 21:54:59,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-06-12 21:54:59,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-06-12 21:54:59,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:59,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-06-12 21:54:59,486 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-06-12 21:54:59,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:59,487 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-06-12 21:54:59,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-12 21:54:59,487 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-06-12 21:54:59,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:54:59,489 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:59,489 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:59,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-12 21:54:59,705 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:59,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:59,705 INFO L82 PathProgramCache]: Analyzing trace with hash 580885030, now seen corresponding path program 16 times [2021-06-12 21:54:59,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:59,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013477164] [2021-06-12 21:54:59,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:59,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:59,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:59,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:59,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013477164] [2021-06-12 21:54:59,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013477164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:59,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878365505] [2021-06-12 21:54:59,742 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:59,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:54:59,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:59,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:54:59,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:59,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:59,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878365505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:59,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:59,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 21:54:59,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043852240] [2021-06-12 21:54:59,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:54:59,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:59,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:54:59,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:54:59,846 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-06-12 21:55:00,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:00,431 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-06-12 21:55:00,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 21:55:00,432 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 24 [2021-06-12 21:55:00,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:00,437 INFO L225 Difference]: With dead ends: 2677 [2021-06-12 21:55:00,437 INFO L226 Difference]: Without dead ends: 2677 [2021-06-12 21:55:00,437 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 340.4ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 21:55:00,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-12 21:55:00,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-06-12 21:55:00,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:00,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-06-12 21:55:00,467 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-06-12 21:55:00,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:00,468 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-06-12 21:55:00,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-06-12 21:55:00,468 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-06-12 21:55:00,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:55:00,471 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:00,471 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:55:00,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-12 21:55:00,694 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:00,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:00,695 INFO L82 PathProgramCache]: Analyzing trace with hash 662261118, now seen corresponding path program 17 times [2021-06-12 21:55:00,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:00,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415064596] [2021-06-12 21:55:00,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:00,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:00,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:00,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:00,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415064596] [2021-06-12 21:55:00,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415064596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:00,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861220527] [2021-06-12 21:55:00,736 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 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 [2021-06-12 21:55:00,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 21:55:00,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:55:00,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:55:00,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:00,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:00,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861220527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:00,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:00,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 21:55:00,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455176971] [2021-06-12 21:55:00,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:55:00,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:00,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:55:00,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:55:00,840 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-06-12 21:55:01,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:01,514 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-06-12 21:55:01,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 21:55:01,515 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 24 [2021-06-12 21:55:01,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:01,521 INFO L225 Difference]: With dead ends: 2474 [2021-06-12 21:55:01,521 INFO L226 Difference]: Without dead ends: 2470 [2021-06-12 21:55:01,521 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 406.2ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 21:55:01,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-06-12 21:55:01,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-06-12 21:55:01,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:01,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-06-12 21:55:01,554 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-06-12 21:55:01,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:01,554 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-06-12 21:55:01,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-06-12 21:55:01,554 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-06-12 21:55:01,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:55:01,557 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:01,557 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:55:01,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-12 21:55:01,782 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:01,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:01,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1592918334, now seen corresponding path program 18 times [2021-06-12 21:55:01,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:01,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886645987] [2021-06-12 21:55:01,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:01,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:01,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:01,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:01,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886645987] [2021-06-12 21:55:01,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886645987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:01,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858735983] [2021-06-12 21:55:01,827 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 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 [2021-06-12 21:55:01,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:55:01,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:55:01,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:55:01,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:01,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:01,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858735983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:01,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:01,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:55:01,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200418770] [2021-06-12 21:55:01,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:55:01,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:01,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:55:01,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:55:01,931 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-06-12 21:55:02,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:02,549 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-06-12 21:55:02,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 21:55:02,550 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-06-12 21:55:02,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:02,555 INFO L225 Difference]: With dead ends: 2514 [2021-06-12 21:55:02,555 INFO L226 Difference]: Without dead ends: 2514 [2021-06-12 21:55:02,556 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 368.5ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 21:55:02,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-06-12 21:55:02,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-06-12 21:55:02,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:02,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-06-12 21:55:02,585 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-06-12 21:55:02,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:02,585 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-06-12 21:55:02,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-06-12 21:55:02,586 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-06-12 21:55:02,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:55:02,587 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:02,587 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:55:02,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-12 21:55:02,811 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:02,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:02,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1059009808, now seen corresponding path program 19 times [2021-06-12 21:55:02,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:02,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515110627] [2021-06-12 21:55:02,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:02,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:02,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:02,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:02,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515110627] [2021-06-12 21:55:02,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515110627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:02,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977143577] [2021-06-12 21:55:02,844 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 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 [2021-06-12 21:55:02,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:02,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:55:02,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:02,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:02,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977143577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:02,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:02,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:55:02,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953546141] [2021-06-12 21:55:02,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:55:02,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:02,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:55:02,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:55:02,969 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-06-12 21:55:03,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:03,574 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-06-12 21:55:03,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 21:55:03,574 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-06-12 21:55:03,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:03,580 INFO L225 Difference]: With dead ends: 2332 [2021-06-12 21:55:03,580 INFO L226 Difference]: Without dead ends: 2328 [2021-06-12 21:55:03,581 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 342.5ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 21:55:03,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-12 21:55:03,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-06-12 21:55:03,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:03,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-06-12 21:55:03,628 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-06-12 21:55:03,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:03,628 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-06-12 21:55:03,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-06-12 21:55:03,629 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-06-12 21:55:03,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:55:03,630 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:03,631 INFO L472 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] [2021-06-12 21:55:03,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-12 21:55:03,845 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:03,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:03,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1971295360, now seen corresponding path program 3 times [2021-06-12 21:55:03,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:03,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690893925] [2021-06-12 21:55:03,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:03,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:03,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:55:03,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:03,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690893925] [2021-06-12 21:55:03,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690893925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:03,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411586692] [2021-06-12 21:55:03,871 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 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 [2021-06-12 21:55:03,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 21:55:03,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:55:03,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 21:55:03,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:03,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:55:03,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411586692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:03,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:03,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 21:55:03,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496145492] [2021-06-12 21:55:03,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 21:55:03,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:03,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 21:55:03,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-12 21:55:03,954 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) 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) [2021-06-12 21:55:04,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:04,031 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-06-12 21:55:04,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 21:55:04,031 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) 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 24 [2021-06-12 21:55:04,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:04,037 INFO L225 Difference]: With dead ends: 929 [2021-06-12 21:55:04,037 INFO L226 Difference]: Without dead ends: 929 [2021-06-12 21:55:04,037 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:55:04,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-06-12 21:55:04,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-06-12 21:55:04,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:04,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-06-12 21:55:04,065 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-06-12 21:55:04,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:04,066 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-06-12 21:55:04,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) 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) [2021-06-12 21:55:04,066 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-06-12 21:55:04,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:55:04,068 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:04,068 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:55:04,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:55:04,281 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:04,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:04,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1041095616, now seen corresponding path program 20 times [2021-06-12 21:55:04,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:04,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461905224] [2021-06-12 21:55:04,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:04,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:04,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:04,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:04,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461905224] [2021-06-12 21:55:04,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461905224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:04,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630869535] [2021-06-12 21:55:04,315 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 [2021-06-12 21:55:04,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:55:04,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:55:04,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:55:04,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:04,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:04,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630869535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:04,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:04,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 21:55:04,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141901348] [2021-06-12 21:55:04,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 21:55:04,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:04,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 21:55:04,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-12 21:55:04,405 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-06-12 21:55:04,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:04,705 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-06-12 21:55:04,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 21:55:04,706 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 24 [2021-06-12 21:55:04,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:04,709 INFO L225 Difference]: With dead ends: 1555 [2021-06-12 21:55:04,709 INFO L226 Difference]: Without dead ends: 1555 [2021-06-12 21:55:04,709 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 164.6ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:55:04,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-06-12 21:55:04,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-06-12 21:55:04,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:04,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-06-12 21:55:04,729 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-06-12 21:55:04,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:04,729 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-06-12 21:55:04,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-06-12 21:55:04,729 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-06-12 21:55:04,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:55:04,731 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:04,731 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:55:04,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:55:04,953 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:04,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:04,953 INFO L82 PathProgramCache]: Analyzing trace with hash 861583836, now seen corresponding path program 21 times [2021-06-12 21:55:04,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:04,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375150032] [2021-06-12 21:55:04,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:04,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:04,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:04,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:04,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375150032] [2021-06-12 21:55:04,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375150032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:04,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414614950] [2021-06-12 21:55:04,988 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 [2021-06-12 21:55:05,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:55:05,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:55:05,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:55:05,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:05,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:05,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414614950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:05,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:05,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 21:55:05,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648569460] [2021-06-12 21:55:05,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 21:55:05,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:05,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 21:55:05,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-12 21:55:05,098 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) 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) [2021-06-12 21:55:05,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:05,331 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-06-12 21:55:05,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 21:55:05,331 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) 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 24 [2021-06-12 21:55:05,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:05,334 INFO L225 Difference]: With dead ends: 1605 [2021-06-12 21:55:05,334 INFO L226 Difference]: Without dead ends: 1605 [2021-06-12 21:55:05,334 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 147.5ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:55:05,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-06-12 21:55:05,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-06-12 21:55:05,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:05,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-06-12 21:55:05,355 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-06-12 21:55:05,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:05,355 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-06-12 21:55:05,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) 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) [2021-06-12 21:55:05,355 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-06-12 21:55:05,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:55:05,357 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:05,357 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:55:05,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:55:05,581 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:05,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:05,581 INFO L82 PathProgramCache]: Analyzing trace with hash 816762694, now seen corresponding path program 22 times [2021-06-12 21:55:05,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:05,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966295855] [2021-06-12 21:55:05,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:05,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:05,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:55:05,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:05,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966295855] [2021-06-12 21:55:05,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966295855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:05,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010557130] [2021-06-12 21:55:05,615 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 [2021-06-12 21:55:05,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:55:05,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:55:05,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:55:05,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:05,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:55:05,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010557130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:05,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:05,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 21:55:05,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662881182] [2021-06-12 21:55:05,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 21:55:05,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:05,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 21:55:05,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-12 21:55:05,684 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) 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) [2021-06-12 21:55:05,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:05,866 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-06-12 21:55:05,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 21:55:05,866 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) 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 24 [2021-06-12 21:55:05,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:05,869 INFO L225 Difference]: With dead ends: 1524 [2021-06-12 21:55:05,869 INFO L226 Difference]: Without dead ends: 1520 [2021-06-12 21:55:05,869 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 101.9ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:55:05,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-06-12 21:55:05,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-06-12 21:55:05,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:05,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-06-12 21:55:05,885 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-06-12 21:55:05,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:05,885 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-06-12 21:55:05,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) 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) [2021-06-12 21:55:05,886 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-06-12 21:55:05,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:55:05,887 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:05,887 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:55:06,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-12 21:55:06,103 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:06,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:06,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1414099352, now seen corresponding path program 23 times [2021-06-12 21:55:06,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:06,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652933293] [2021-06-12 21:55:06,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:06,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:06,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:06,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:06,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652933293] [2021-06-12 21:55:06,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652933293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:06,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918689920] [2021-06-12 21:55:06,148 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 [2021-06-12 21:55:06,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:55:06,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:55:06,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:55:06,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:06,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:06,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918689920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:06,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:06,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 21:55:06,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046510791] [2021-06-12 21:55:06,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 21:55:06,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:06,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 21:55:06,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-12 21:55:06,228 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-06-12 21:55:06,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:06,448 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-06-12 21:55:06,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 21:55:06,449 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 24 [2021-06-12 21:55:06,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:06,451 INFO L225 Difference]: With dead ends: 1508 [2021-06-12 21:55:06,451 INFO L226 Difference]: Without dead ends: 1496 [2021-06-12 21:55:06,451 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 126.0ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:55:06,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-06-12 21:55:06,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-06-12 21:55:06,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:06,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-06-12 21:55:06,468 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-06-12 21:55:06,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:06,468 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-06-12 21:55:06,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-06-12 21:55:06,468 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-06-12 21:55:06,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:55:06,470 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:06,470 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:55:06,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:55:06,689 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:06,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:06,689 INFO L82 PathProgramCache]: Analyzing trace with hash 887679068, now seen corresponding path program 24 times [2021-06-12 21:55:06,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:06,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752380057] [2021-06-12 21:55:06,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:06,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:06,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:06,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752380057] [2021-06-12 21:55:06,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752380057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:06,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749007036] [2021-06-12 21:55:06,727 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 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 [2021-06-12 21:55:06,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:55:06,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:55:06,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:55:06,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:06,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:06,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749007036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:06,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:06,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:55:06,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088486630] [2021-06-12 21:55:06,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:55:06,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:06,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:55:06,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:55:06,843 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-12 21:55:07,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:07,357 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-06-12 21:55:07,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 21:55:07,357 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-06-12 21:55:07,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:07,360 INFO L225 Difference]: With dead ends: 2412 [2021-06-12 21:55:07,360 INFO L226 Difference]: Without dead ends: 2412 [2021-06-12 21:55:07,361 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 347.0ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:55:07,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-06-12 21:55:07,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-06-12 21:55:07,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:07,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-06-12 21:55:07,381 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-06-12 21:55:07,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:07,381 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-06-12 21:55:07,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-12 21:55:07,382 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-06-12 21:55:07,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:55:07,383 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:07,383 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:55:07,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-12 21:55:07,589 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:07,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:07,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1454631148, now seen corresponding path program 25 times [2021-06-12 21:55:07,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:07,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721211592] [2021-06-12 21:55:07,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:07,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:07,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:07,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:07,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721211592] [2021-06-12 21:55:07,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721211592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:07,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427541674] [2021-06-12 21:55:07,625 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 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 [2021-06-12 21:55:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:07,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:55:07,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:07,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:07,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427541674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:07,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:07,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:55:07,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561469446] [2021-06-12 21:55:07,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:55:07,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:07,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:55:07,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:55:07,747 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-12 21:55:08,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:08,189 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-06-12 21:55:08,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 21:55:08,190 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-06-12 21:55:08,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:08,193 INFO L225 Difference]: With dead ends: 2335 [2021-06-12 21:55:08,193 INFO L226 Difference]: Without dead ends: 2335 [2021-06-12 21:55:08,194 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 304.8ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:55:08,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-06-12 21:55:08,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-06-12 21:55:08,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:08,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-12 21:55:08,219 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-12 21:55:08,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:08,219 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-12 21:55:08,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-12 21:55:08,219 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-12 21:55:08,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:55:08,221 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:08,221 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:55:08,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:55:08,440 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:08,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:08,441 INFO L82 PathProgramCache]: Analyzing trace with hash 282285290, now seen corresponding path program 26 times [2021-06-12 21:55:08,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:08,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319130325] [2021-06-12 21:55:08,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:08,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:08,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319130325] [2021-06-12 21:55:08,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319130325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:08,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733273635] [2021-06-12 21:55:08,477 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 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 [2021-06-12 21:55:08,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:55:08,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:55:08,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:55:08,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:08,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:08,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733273635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:08,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:08,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 21:55:08,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103406509] [2021-06-12 21:55:08,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:55:08,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:08,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:55:08,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:55:08,582 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-06-12 21:55:08,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:08,985 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-06-12 21:55:08,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 21:55:08,987 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 24 [2021-06-12 21:55:08,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:08,990 INFO L225 Difference]: With dead ends: 2285 [2021-06-12 21:55:08,991 INFO L226 Difference]: Without dead ends: 2285 [2021-06-12 21:55:08,991 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 266.5ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:55:08,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-12 21:55:09,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-06-12 21:55:09,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:09,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-12 21:55:09,010 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-12 21:55:09,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:09,010 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-12 21:55:09,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-06-12 21:55:09,010 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-12 21:55:09,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:55:09,012 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:09,012 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:55:09,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-12 21:55:09,216 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:09,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:09,216 INFO L82 PathProgramCache]: Analyzing trace with hash 363661378, now seen corresponding path program 27 times [2021-06-12 21:55:09,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:09,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058300446] [2021-06-12 21:55:09,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:09,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:09,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:09,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:09,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058300446] [2021-06-12 21:55:09,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058300446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:09,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619872717] [2021-06-12 21:55:09,259 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 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 [2021-06-12 21:55:09,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:55:09,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:55:09,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:55:09,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:09,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:09,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619872717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:09,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:09,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 21:55:09,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118479268] [2021-06-12 21:55:09,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:55:09,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:09,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:55:09,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:55:09,361 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-06-12 21:55:09,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:09,739 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-06-12 21:55:09,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 21:55:09,739 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 24 [2021-06-12 21:55:09,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:09,742 INFO L225 Difference]: With dead ends: 2176 [2021-06-12 21:55:09,742 INFO L226 Difference]: Without dead ends: 2172 [2021-06-12 21:55:09,743 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 229.2ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:55:09,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-12 21:55:09,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-06-12 21:55:09,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:09,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-12 21:55:09,766 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-12 21:55:09,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:09,766 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-12 21:55:09,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-06-12 21:55:09,766 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-12 21:55:09,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:55:09,768 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:09,768 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:55:09,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:55:09,981 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:09,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:09,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1294318594, now seen corresponding path program 28 times [2021-06-12 21:55:09,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:09,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944624121] [2021-06-12 21:55:09,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:09,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:10,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:10,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:10,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944624121] [2021-06-12 21:55:10,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944624121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:10,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079474734] [2021-06-12 21:55:10,031 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 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 [2021-06-12 21:55:10,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:55:10,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:55:10,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:55:10,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:10,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:10,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079474734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:10,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:10,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:55:10,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258699369] [2021-06-12 21:55:10,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:55:10,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:10,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:55:10,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:55:10,151 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-06-12 21:55:10,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:10,495 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-06-12 21:55:10,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 21:55:10,496 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-06-12 21:55:10,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:10,498 INFO L225 Difference]: With dead ends: 2199 [2021-06-12 21:55:10,498 INFO L226 Difference]: Without dead ends: 2199 [2021-06-12 21:55:10,499 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 238.9ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:55:10,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-06-12 21:55:10,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-06-12 21:55:10,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:10,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-12 21:55:10,517 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-12 21:55:10,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:10,517 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-12 21:55:10,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-06-12 21:55:10,517 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-12 21:55:10,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:55:10,519 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:10,519 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:55:10,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-12 21:55:10,719 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:10,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:10,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1357609548, now seen corresponding path program 29 times [2021-06-12 21:55:10,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:10,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375097555] [2021-06-12 21:55:10,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:10,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:10,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:10,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:10,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375097555] [2021-06-12 21:55:10,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375097555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:10,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822972771] [2021-06-12 21:55:10,754 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 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 [2021-06-12 21:55:10,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:55:10,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:55:10,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:55:10,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:10,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:10,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822972771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:10,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:10,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:55:10,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375774724] [2021-06-12 21:55:10,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:55:10,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:10,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:55:10,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:55:10,857 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-06-12 21:55:11,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:11,235 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-06-12 21:55:11,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 21:55:11,236 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-06-12 21:55:11,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:11,238 INFO L225 Difference]: With dead ends: 2156 [2021-06-12 21:55:11,238 INFO L226 Difference]: Without dead ends: 2152 [2021-06-12 21:55:11,239 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 253.2ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:55:11,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-06-12 21:55:11,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-06-12 21:55:11,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:11,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-12 21:55:11,260 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-12 21:55:11,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:11,260 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-12 21:55:11,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-06-12 21:55:11,261 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-12 21:55:11,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:55:11,262 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:11,262 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:55:11,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-12 21:55:11,485 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:11,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:11,485 INFO L82 PathProgramCache]: Analyzing trace with hash -354181564, now seen corresponding path program 30 times [2021-06-12 21:55:11,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:11,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233038171] [2021-06-12 21:55:11,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:11,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:11,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:11,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:11,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233038171] [2021-06-12 21:55:11,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233038171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:11,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410274850] [2021-06-12 21:55:11,520 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 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 [2021-06-12 21:55:11,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:55:11,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:55:11,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:55:11,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:11,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:11,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410274850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:11,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:11,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 21:55:11,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560786092] [2021-06-12 21:55:11,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:55:11,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:11,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:55:11,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:55:11,612 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-06-12 21:55:11,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:11,947 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-06-12 21:55:11,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 21:55:11,947 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 24 [2021-06-12 21:55:11,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:11,950 INFO L225 Difference]: With dead ends: 2097 [2021-06-12 21:55:11,950 INFO L226 Difference]: Without dead ends: 2097 [2021-06-12 21:55:11,950 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 214.4ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:55:11,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-06-12 21:55:11,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-06-12 21:55:11,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:11,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-06-12 21:55:11,968 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-06-12 21:55:11,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:11,969 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-06-12 21:55:11,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-06-12 21:55:11,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-06-12 21:55:11,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:55:11,971 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:11,971 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:55:12,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:55:12,179 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:12,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:12,180 INFO L82 PathProgramCache]: Analyzing trace with hash -272805476, now seen corresponding path program 31 times [2021-06-12 21:55:12,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:12,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955732090] [2021-06-12 21:55:12,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:12,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:12,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:12,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:12,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955732090] [2021-06-12 21:55:12,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955732090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:12,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297827513] [2021-06-12 21:55:12,210 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 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 [2021-06-12 21:55:12,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:12,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:55:12,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:12,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:12,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297827513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:12,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:12,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 21:55:12,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117061482] [2021-06-12 21:55:12,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:55:12,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:12,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:55:12,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:55:12,288 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-06-12 21:55:12,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:12,546 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-06-12 21:55:12,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 21:55:12,547 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 24 [2021-06-12 21:55:12,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:12,549 INFO L225 Difference]: With dead ends: 1963 [2021-06-12 21:55:12,549 INFO L226 Difference]: Without dead ends: 1959 [2021-06-12 21:55:12,550 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 159.3ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:55:12,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-06-12 21:55:12,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-06-12 21:55:12,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:12,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-06-12 21:55:12,572 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-06-12 21:55:12,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:12,573 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-06-12 21:55:12,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-06-12 21:55:12,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-06-12 21:55:12,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:55:12,575 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:12,575 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:55:12,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-06-12 21:55:12,797 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:12,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:12,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1787897448, now seen corresponding path program 32 times [2021-06-12 21:55:12,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:12,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403037403] [2021-06-12 21:55:12,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:12,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:12,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:12,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403037403] [2021-06-12 21:55:12,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403037403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:12,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836397782] [2021-06-12 21:55:12,830 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 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 [2021-06-12 21:55:12,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:55:12,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:55:12,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:55:12,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:12,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836397782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:12,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:12,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 21:55:12,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118809794] [2021-06-12 21:55:12,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:55:12,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:12,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:55:12,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:55:12,908 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-06-12 21:55:13,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:13,128 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-06-12 21:55:13,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 21:55:13,128 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 24 [2021-06-12 21:55:13,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:13,131 INFO L225 Difference]: With dead ends: 1728 [2021-06-12 21:55:13,131 INFO L226 Difference]: Without dead ends: 1716 [2021-06-12 21:55:13,131 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 131.8ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:55:13,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-06-12 21:55:13,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-06-12 21:55:13,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:13,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-06-12 21:55:13,146 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-06-12 21:55:13,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:13,147 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-06-12 21:55:13,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-06-12 21:55:13,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-06-12 21:55:13,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:55:13,149 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:13,149 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:55:13,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:55:13,371 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:13,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:13,371 INFO L82 PathProgramCache]: Analyzing trace with hash -190770732, now seen corresponding path program 33 times [2021-06-12 21:55:13,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:13,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188030711] [2021-06-12 21:55:13,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:13,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:13,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:13,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:13,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188030711] [2021-06-12 21:55:13,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188030711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:13,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220594926] [2021-06-12 21:55:13,411 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 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 [2021-06-12 21:55:13,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:55:13,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:55:13,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:55:13,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:13,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:13,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220594926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:13,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:13,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:55:13,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966432325] [2021-06-12 21:55:13,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:55:13,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:13,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:55:13,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:55:13,511 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-06-12 21:55:13,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:13,846 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-06-12 21:55:13,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 21:55:13,847 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-06-12 21:55:13,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:13,849 INFO L225 Difference]: With dead ends: 1821 [2021-06-12 21:55:13,849 INFO L226 Difference]: Without dead ends: 1821 [2021-06-12 21:55:13,849 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 212.9ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:55:13,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-06-12 21:55:13,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-06-12 21:55:13,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:13,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-06-12 21:55:13,867 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-06-12 21:55:13,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:13,867 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-06-12 21:55:13,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-06-12 21:55:13,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-06-12 21:55:13,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:55:13,868 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:13,868 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:55:14,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-12 21:55:14,069 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:14,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:14,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1452268422, now seen corresponding path program 34 times [2021-06-12 21:55:14,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:14,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314920297] [2021-06-12 21:55:14,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:14,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:14,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:14,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:14,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314920297] [2021-06-12 21:55:14,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314920297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:14,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382521240] [2021-06-12 21:55:14,108 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 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 [2021-06-12 21:55:14,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:55:14,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:55:14,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:55:14,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:14,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:14,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382521240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:14,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:14,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 21:55:14,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615278523] [2021-06-12 21:55:14,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:55:14,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:14,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:55:14,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:55:14,210 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-06-12 21:55:14,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:14,451 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-06-12 21:55:14,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 21:55:14,452 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-06-12 21:55:14,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:14,454 INFO L225 Difference]: With dead ends: 1790 [2021-06-12 21:55:14,454 INFO L226 Difference]: Without dead ends: 1786 [2021-06-12 21:55:14,454 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 162.3ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:55:14,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-06-12 21:55:14,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-06-12 21:55:14,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:14,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-06-12 21:55:14,480 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-06-12 21:55:14,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:14,480 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-06-12 21:55:14,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-06-12 21:55:14,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-06-12 21:55:14,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:55:14,483 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:14,483 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:55:14,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-12 21:55:14,697 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:14,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:14,697 INFO L82 PathProgramCache]: Analyzing trace with hash 184811244, now seen corresponding path program 35 times [2021-06-12 21:55:14,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:14,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419710543] [2021-06-12 21:55:14,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:14,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:14,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:14,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:14,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419710543] [2021-06-12 21:55:14,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419710543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:14,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155822123] [2021-06-12 21:55:14,735 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 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 [2021-06-12 21:55:14,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:55:14,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:55:14,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:55:14,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:14,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:14,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155822123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:14,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:14,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 21:55:14,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27718948] [2021-06-12 21:55:14,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:55:14,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:14,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:55:14,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:55:14,825 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-06-12 21:55:14,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:14,970 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-06-12 21:55:14,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:55:14,971 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 24 [2021-06-12 21:55:14,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:14,973 INFO L225 Difference]: With dead ends: 1649 [2021-06-12 21:55:14,973 INFO L226 Difference]: Without dead ends: 1637 [2021-06-12 21:55:14,973 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 96.2ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:55:14,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-06-12 21:55:14,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-06-12 21:55:14,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:14,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-06-12 21:55:14,989 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-06-12 21:55:14,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:14,989 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-06-12 21:55:14,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-06-12 21:55:14,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-06-12 21:55:14,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:55:14,991 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:14,991 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:55:15,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:55:15,192 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:15,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:15,192 INFO L82 PathProgramCache]: Analyzing trace with hash -998684486, now seen corresponding path program 4 times [2021-06-12 21:55:15,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:15,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995263475] [2021-06-12 21:55:15,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:15,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:15,432 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-06-12 21:55:15,565 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-12 21:55:15,681 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-12 21:55:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:15,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:15,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995263475] [2021-06-12 21:55:15,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995263475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:15,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186331752] [2021-06-12 21:55:15,858 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 [2021-06-12 21:55:15,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:55:15,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:55:15,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 21:55:15,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:16,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:16,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:16,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:16,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 21:55:16,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:16,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:16,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:16,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:16,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:55:16,403 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:16,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:16,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:16,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:16,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-06-12 21:55:16,411 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:16,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:16,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:16,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:16,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:55:16,419 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:16,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:16,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:16,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:16,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:55:16,429 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:16,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:16,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:16,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:16,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:55:16,438 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:16,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:16,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:16,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:16,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:55:16,447 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:16,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:16,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:16,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:16,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:55:16,457 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:16,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:16,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:16,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:16,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:55:16,465 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:16,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:16,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:16,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:16,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 21:55:16,472 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:16,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:16,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:16,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:16,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:55:16,481 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:16,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:16,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:16,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:16,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:55:16,488 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:16,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:16,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:16,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:16,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 21:55:16,497 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:16,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:16,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:16,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:16,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:55:16,505 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:16,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:16,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:16,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 21:55:16,510 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:16,586 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-12 21:55:16,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 21:55:16,588 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-12 21:55:16,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:16,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186331752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:16,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:16,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 21:55:16,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161807880] [2021-06-12 21:55:16,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:55:16,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:16,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:55:16,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:55:16,646 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 21:55:17,299 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2021-06-12 21:55:17,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:17,583 INFO L93 Difference]: Finished difference Result 1531 states and 5001 transitions. [2021-06-12 21:55:17,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:55:17,584 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-06-12 21:55:17,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:17,586 INFO L225 Difference]: With dead ends: 1531 [2021-06-12 21:55:17,586 INFO L226 Difference]: Without dead ends: 1516 [2021-06-12 21:55:17,586 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1387.2ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:55:17,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2021-06-12 21:55:17,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1141. [2021-06-12 21:55:17,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:17,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-06-12 21:55:17,602 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-06-12 21:55:17,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:17,603 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-06-12 21:55:17,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 21:55:17,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-06-12 21:55:17,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:55:17,605 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:17,605 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:55:17,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-12 21:55:17,821 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:17,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:17,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1267884794, now seen corresponding path program 5 times [2021-06-12 21:55:17,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:17,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594758892] [2021-06-12 21:55:17,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:17,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:18,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:18,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:18,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594758892] [2021-06-12 21:55:18,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594758892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:18,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88090757] [2021-06-12 21:55:18,535 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 [2021-06-12 21:55:18,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:55:18,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:55:18,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 21:55:18,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:19,087 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-12 21:55:19,154 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_3], 2=[A, v_prenex_5]} [2021-06-12 21:55:19,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:19,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:55:19,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:19,282 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-06-12 21:55:19,282 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-06-12 21:55:19,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:19,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:19,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:19,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:55:19,289 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:19,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:19,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:19,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:55:19,294 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:19,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:19,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:19,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:19,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:55:19,337 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:19,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:19,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 21:55:19,375 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-06-12 21:55:19,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:19,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88090757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:19,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:19,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 21:55:19,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135278441] [2021-06-12 21:55:19,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:55:19,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:19,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:55:19,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:55:19,453 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 21:55:20,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:20,331 INFO L93 Difference]: Finished difference Result 1509 states and 4945 transitions. [2021-06-12 21:55:20,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:55:20,332 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-06-12 21:55:20,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:20,334 INFO L225 Difference]: With dead ends: 1509 [2021-06-12 21:55:20,334 INFO L226 Difference]: Without dead ends: 1494 [2021-06-12 21:55:20,335 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1510.1ms TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:55:20,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2021-06-12 21:55:20,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1150. [2021-06-12 21:55:20,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:20,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-06-12 21:55:20,350 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-06-12 21:55:20,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:20,350 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-06-12 21:55:20,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 21:55:20,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-06-12 21:55:20,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:55:20,352 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:20,352 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:55:20,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:55:20,557 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:20,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:20,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1435653194, now seen corresponding path program 36 times [2021-06-12 21:55:20,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:20,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764810317] [2021-06-12 21:55:20,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:20,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:21,099 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-06-12 21:55:21,283 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-06-12 21:55:21,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:21,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:21,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764810317] [2021-06-12 21:55:21,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764810317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:21,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037618707] [2021-06-12 21:55:21,427 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 [2021-06-12 21:55:21,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:55:21,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:55:21,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:55:21,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:22,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:22,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:22,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 21:55:22,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:22,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:22,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:22,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 21:55:22,131 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:22,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:22,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:22,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 21:55:22,143 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:22,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:22,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:22,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 21:55:22,158 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:22,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:22,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:22,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-12 21:55:22,170 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:22,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:22,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:22,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-12 21:55:22,181 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:22,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:22,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:22,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-12 21:55:22,190 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:22,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:22,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:22,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-12 21:55:22,202 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:22,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:22,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:22,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-12 21:55:22,212 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:22,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:22,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:22,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-12 21:55:22,222 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:22,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:22,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:22,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 21:55:22,232 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:22,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:22,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:22,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-12 21:55:22,245 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:22,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:22,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:22,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 21:55:22,255 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:22,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:22,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:22,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-12 21:55:22,266 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:22,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:22,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:22,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:22,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-12 21:55:22,272 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:22,300 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-06-12 21:55:22,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:55:22,302 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-12 21:55:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:22,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037618707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:22,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:22,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-12 21:55:22,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999354154] [2021-06-12 21:55:22,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:55:22,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:22,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:55:22,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:55:22,343 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:23,509 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 41 [2021-06-12 21:55:24,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:24,112 INFO L93 Difference]: Finished difference Result 1607 states and 5192 transitions. [2021-06-12 21:55:24,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 21:55:24,112 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:55:24,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:24,114 INFO L225 Difference]: With dead ends: 1607 [2021-06-12 21:55:24,114 INFO L226 Difference]: Without dead ends: 1592 [2021-06-12 21:55:24,115 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 2281.3ms TimeCoverageRelationStatistics Valid=247, Invalid=1159, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 21:55:24,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-06-12 21:55:24,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1180. [2021-06-12 21:55:24,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:24,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-06-12 21:55:24,129 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-06-12 21:55:24,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:24,129 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-06-12 21:55:24,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:24,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-06-12 21:55:24,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:55:24,131 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:24,131 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:55:24,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-12 21:55:24,332 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:24,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:24,332 INFO L82 PathProgramCache]: Analyzing trace with hash -630606018, now seen corresponding path program 6 times [2021-06-12 21:55:24,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:24,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174633159] [2021-06-12 21:55:24,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:24,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:24,853 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-06-12 21:55:25,072 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-06-12 21:55:25,302 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-06-12 21:55:25,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:25,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:25,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174633159] [2021-06-12 21:55:25,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174633159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:25,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694714982] [2021-06-12 21:55:25,353 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 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 [2021-06-12 21:55:25,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:55:25,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:55:25,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:55:25,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:25,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:25,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:25,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:25,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 21:55:25,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:25,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:25,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:25,704 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:55:25,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-12 21:55:25,705 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:25,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:25,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:25,719 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:25,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-06-12 21:55:25,725 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:25,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:25,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:25,741 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:55:25,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-06-12 21:55:25,743 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:25,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:25,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:25,762 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:55:25,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-06-12 21:55:25,764 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:25,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:25,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:25,776 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:55:25,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-06-12 21:55:25,777 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:25,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:25,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:25,791 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:55:25,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-06-12 21:55:25,792 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:25,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:25,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:25,807 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:55:25,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 30 [2021-06-12 21:55:25,808 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:25,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:25,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:25,820 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:55:25,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-06-12 21:55:25,821 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:25,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:25,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:25,834 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:55:25,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-06-12 21:55:25,836 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:25,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:25,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:25,850 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:55:25,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 25 [2021-06-12 21:55:25,851 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:25,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:25,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:25,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:25,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-06-12 21:55:25,871 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:25,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:25,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:25,887 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:25,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2021-06-12 21:55:25,889 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:25,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:25,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:25,906 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:55:25,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 24 [2021-06-12 21:55:25,908 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:25,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:25,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:25,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:25,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-06-12 21:55:25,926 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:25,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:25,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:25,935 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:55:25,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-06-12 21:55:25,936 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:26,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:26,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 21:55:26,022 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:865, output treesize:221 [2021-06-12 21:55:26,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:26,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694714982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:26,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:26,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 21:55:26,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85940216] [2021-06-12 21:55:26,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:55:26,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:26,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:55:26,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:55:26,252 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:27,001 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-06-12 21:55:27,138 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-06-12 21:55:27,279 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2021-06-12 21:55:27,673 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-06-12 21:55:27,828 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-06-12 21:55:28,105 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-06-12 21:55:28,258 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-06-12 21:55:28,506 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2021-06-12 21:55:28,669 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-06-12 21:55:29,207 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-06-12 21:55:29,467 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2021-06-12 21:55:29,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:29,568 INFO L93 Difference]: Finished difference Result 1843 states and 5867 transitions. [2021-06-12 21:55:29,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 21:55:29,568 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:55:29,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:29,570 INFO L225 Difference]: With dead ends: 1843 [2021-06-12 21:55:29,570 INFO L226 Difference]: Without dead ends: 1828 [2021-06-12 21:55:29,571 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 3844.0ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 21:55:29,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-06-12 21:55:29,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1198. [2021-06-12 21:55:29,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.346700083542189) internal successors, (4006), 1197 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:29,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-06-12 21:55:29,587 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-06-12 21:55:29,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:29,588 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-06-12 21:55:29,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:29,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-06-12 21:55:29,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:55:29,589 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:29,589 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:55:29,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:55:29,790 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:29,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:29,790 INFO L82 PathProgramCache]: Analyzing trace with hash 919775546, now seen corresponding path program 37 times [2021-06-12 21:55:29,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:29,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202917551] [2021-06-12 21:55:29,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:29,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:30,215 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-06-12 21:55:30,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:30,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:30,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202917551] [2021-06-12 21:55:30,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202917551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:30,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24866363] [2021-06-12 21:55:30,390 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 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 [2021-06-12 21:55:30,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:30,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 21:55:30,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:31,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:31,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:31,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-12 21:55:31,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:31,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:31,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:31,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 21:55:31,073 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:31,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:31,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:31,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-12 21:55:31,083 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:31,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:31,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:31,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 21:55:31,094 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:31,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:31,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:31,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-12 21:55:31,103 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:31,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:31,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:31,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-12 21:55:31,111 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:31,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:31,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:31,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-12 21:55:31,120 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:31,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:31,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:31,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 21:55:31,132 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:31,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:31,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:31,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-12 21:55:31,141 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:31,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:31,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:31,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-12 21:55:31,149 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:31,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:31,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:31,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 21:55:31,157 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:31,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:31,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:31,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 21:55:31,164 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:31,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:31,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:31,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-12 21:55:31,171 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:31,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:31,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:31,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-12 21:55:31,180 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:31,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:31,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:31,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:31,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 21:55:31,185 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:31,208 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-06-12 21:55:31,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:55:31,209 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-12 21:55:31,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:31,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24866363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:31,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:31,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-12 21:55:31,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011290435] [2021-06-12 21:55:31,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:55:31,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:31,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:55:31,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:55:31,263 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:32,460 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 49 [2021-06-12 21:55:32,680 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2021-06-12 21:55:32,823 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2021-06-12 21:55:32,952 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2021-06-12 21:55:33,291 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 52 [2021-06-12 21:55:33,466 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2021-06-12 21:55:33,947 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 54 [2021-06-12 21:55:34,423 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-06-12 21:55:34,596 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-06-12 21:55:34,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:34,725 INFO L93 Difference]: Finished difference Result 1877 states and 5988 transitions. [2021-06-12 21:55:34,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 21:55:34,726 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:55:34,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:34,728 INFO L225 Difference]: With dead ends: 1877 [2021-06-12 21:55:34,728 INFO L226 Difference]: Without dead ends: 1862 [2021-06-12 21:55:34,729 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 3599.2ms TimeCoverageRelationStatistics Valid=480, Invalid=2276, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 21:55:34,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-06-12 21:55:34,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1206. [2021-06-12 21:55:34,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 3.349377593360996) internal successors, (4036), 1205 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:34,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-06-12 21:55:34,744 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-06-12 21:55:34,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:34,744 INFO L482 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-06-12 21:55:34,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:34,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-06-12 21:55:34,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:55:34,746 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:34,746 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:55:34,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:55:34,946 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:34,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:34,947 INFO L82 PathProgramCache]: Analyzing trace with hash -56543298, now seen corresponding path program 38 times [2021-06-12 21:55:34,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:34,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134948144] [2021-06-12 21:55:34,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:34,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:35,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:35,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:35,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134948144] [2021-06-12 21:55:35,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134948144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:35,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489211252] [2021-06-12 21:55:35,547 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 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 [2021-06-12 21:55:35,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:55:35,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:55:35,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:55:35,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:36,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:36,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:36,272 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-12 21:55:36,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-06-12 21:55:36,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:36,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:36,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:36,309 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-06-12 21:55:36,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 29 [2021-06-12 21:55:36,311 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:36,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:36,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:36,337 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-12 21:55:36,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 31 [2021-06-12 21:55:36,343 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:36,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:36,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:36,386 INFO L354 Elim1Store]: treesize reduction 9, result has 66.7 percent of original size [2021-06-12 21:55:36,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 36 [2021-06-12 21:55:36,391 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:36,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:36,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:36,412 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 21:55:36,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-06-12 21:55:36,413 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:36,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:36,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:36,431 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 21:55:36,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-12 21:55:36,432 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:36,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:36,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:36,461 INFO L354 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2021-06-12 21:55:36,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 22 [2021-06-12 21:55:36,463 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:36,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:36,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:36,479 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 21:55:36,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-12 21:55:36,480 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:36,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:36,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:36,514 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-12 21:55:36,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 28 [2021-06-12 21:55:36,519 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:36,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:36,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:36,534 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 21:55:36,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-06-12 21:55:36,535 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:36,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:36,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:36,551 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 21:55:36,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-12 21:55:36,552 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:36,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:36,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:36,575 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-12 21:55:36,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 28 [2021-06-12 21:55:36,576 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:36,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:36,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:36,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:36,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-06-12 21:55:36,633 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:36,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:36,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:36,654 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 21:55:36,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-12 21:55:36,655 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:36,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:36,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:36,674 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 21:55:36,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-12 21:55:36,675 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:36,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:36,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:36,687 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 21:55:36,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-12 21:55:36,688 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:36,841 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-06-12 21:55:36,842 INFO L628 ElimStorePlain]: treesize reduction 94, result has 58.6 percent of original size [2021-06-12 21:55:36,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 21:55:36,849 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:148 [2021-06-12 21:55:37,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:37,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489211252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:37,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:37,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-06-12 21:55:37,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043478879] [2021-06-12 21:55:37,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:55:37,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:37,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:55:37,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:55:37,021 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:38,422 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-06-12 21:55:38,546 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-06-12 21:55:38,749 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 48 [2021-06-12 21:55:38,884 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 45 [2021-06-12 21:55:39,216 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-06-12 21:55:39,758 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2021-06-12 21:55:39,905 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-06-12 21:55:40,046 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-12 21:55:40,383 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-06-12 21:55:40,695 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2021-06-12 21:55:40,868 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 42 [2021-06-12 21:55:41,118 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-06-12 21:55:41,397 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-06-12 21:55:41,522 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2021-06-12 21:55:41,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:41,659 INFO L93 Difference]: Finished difference Result 2051 states and 6324 transitions. [2021-06-12 21:55:41,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 21:55:41,659 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:55:41,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:41,662 INFO L225 Difference]: With dead ends: 2051 [2021-06-12 21:55:41,662 INFO L226 Difference]: Without dead ends: 2006 [2021-06-12 21:55:41,663 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 4821.6ms TimeCoverageRelationStatistics Valid=531, Invalid=3129, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 21:55:41,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2021-06-12 21:55:41,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 1381. [2021-06-12 21:55:41,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1380 states have (on average 3.318840579710145) internal successors, (4580), 1380 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:41,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 4580 transitions. [2021-06-12 21:55:41,682 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 4580 transitions. Word has length 26 [2021-06-12 21:55:41,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:41,682 INFO L482 AbstractCegarLoop]: Abstraction has 1381 states and 4580 transitions. [2021-06-12 21:55:41,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:41,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 4580 transitions. [2021-06-12 21:55:41,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:55:41,684 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:41,684 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:55:41,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-06-12 21:55:41,884 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:41,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:41,885 INFO L82 PathProgramCache]: Analyzing trace with hash -2141610526, now seen corresponding path program 7 times [2021-06-12 21:55:41,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:41,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161487694] [2021-06-12 21:55:41,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:42,103 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-06-12 21:55:42,235 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-12 21:55:42,357 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-06-12 21:55:42,476 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-06-12 21:55:42,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:42,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:42,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161487694] [2021-06-12 21:55:42,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161487694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:42,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264562078] [2021-06-12 21:55:42,584 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 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 [2021-06-12 21:55:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:42,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:55:42,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:43,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:43,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:43,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:43,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:55:43,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:43,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:43,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:43,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:43,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:55:43,067 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:43,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:43,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:43,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:43,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 21:55:43,074 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:43,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:43,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:43,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:43,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:55:43,082 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:43,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:43,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:43,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:43,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 21:55:43,090 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:43,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:43,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:43,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:43,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:55:43,101 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:43,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:43,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:43,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:43,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:55:43,108 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:43,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:43,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:43,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:43,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:55:43,116 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:43,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:43,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:43,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:43,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:55:43,123 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:43,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:43,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:43,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:43,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 21:55:43,130 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:43,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:43,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:43,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:43,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:55:43,138 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:43,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:43,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:43,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:43,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-06-12 21:55:43,144 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:43,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:43,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:43,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:43,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:55:43,154 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:43,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:43,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:43,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:43,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:55:43,160 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:43,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:43,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:43,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 21:55:43,165 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:43,251 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-12 21:55:43,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 21:55:43,253 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-12 21:55:43,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:43,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264562078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:43,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:43,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 21:55:43,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682163546] [2021-06-12 21:55:43,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:55:43,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:43,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:55:43,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:55:43,307 INFO L87 Difference]: Start difference. First operand 1381 states and 4580 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:44,222 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-06-12 21:55:45,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:45,211 INFO L93 Difference]: Finished difference Result 1960 states and 6315 transitions. [2021-06-12 21:55:45,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 21:55:45,211 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:55:45,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:45,214 INFO L225 Difference]: With dead ends: 1960 [2021-06-12 21:55:45,214 INFO L226 Difference]: Without dead ends: 1945 [2021-06-12 21:55:45,214 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 2323.9ms TimeCoverageRelationStatistics Valid=236, Invalid=1170, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 21:55:45,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2021-06-12 21:55:45,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 1425. [2021-06-12 21:55:45,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1424 states have (on average 3.3202247191011236) internal successors, (4728), 1424 states have internal predecessors, (4728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:45,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 4728 transitions. [2021-06-12 21:55:45,234 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 4728 transitions. Word has length 26 [2021-06-12 21:55:45,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:45,234 INFO L482 AbstractCegarLoop]: Abstraction has 1425 states and 4728 transitions. [2021-06-12 21:55:45,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:45,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 4728 transitions. [2021-06-12 21:55:45,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:55:45,237 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:45,237 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:55:45,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:55:45,452 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:45,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:45,452 INFO L82 PathProgramCache]: Analyzing trace with hash 124958754, now seen corresponding path program 8 times [2021-06-12 21:55:45,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:45,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004502551] [2021-06-12 21:55:45,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:45,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:46,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:46,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:46,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004502551] [2021-06-12 21:55:46,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004502551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:46,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039412879] [2021-06-12 21:55:46,010 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 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 [2021-06-12 21:55:46,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:55:46,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:55:46,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 21:55:46,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:46,448 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-06-12 21:55:46,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:46,543 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:46,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 41 [2021-06-12 21:55:46,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:46,758 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-06-12 21:55:46,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:46,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:46,790 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-12 21:55:46,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-06-12 21:55:46,795 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:46,961 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-06-12 21:55:46,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:46,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:46,985 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-12 21:55:46,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-06-12 21:55:46,989 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:47,129 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-06-12 21:55:47,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:47,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:47,156 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-12 21:55:47,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 34 [2021-06-12 21:55:47,161 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:47,296 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-06-12 21:55:47,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:47,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:47,315 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:47,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 34 [2021-06-12 21:55:47,323 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:47,488 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-12 21:55:47,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:47,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:47,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:47,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 41 [2021-06-12 21:55:47,515 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:47,684 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-12 21:55:47,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:47,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:47,709 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-12 21:55:47,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 30 [2021-06-12 21:55:47,711 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:47,844 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-12 21:55:47,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:47,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:47,862 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-12 21:55:47,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 29 [2021-06-12 21:55:47,864 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:47,987 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-12 21:55:47,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:48,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 21:55:48,005 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:445, output treesize:479 [2021-06-12 21:55:48,280 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-06-12 21:55:48,507 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-06-12 21:55:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:48,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039412879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:48,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:48,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 21:55:48,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124685353] [2021-06-12 21:55:48,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:55:48,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:48,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:55:48,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:55:48,638 INFO L87 Difference]: Start difference. First operand 1425 states and 4728 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:49,701 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 55 [2021-06-12 21:55:50,074 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 60 [2021-06-12 21:55:50,459 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 56 [2021-06-12 21:55:50,782 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 58 [2021-06-12 21:55:51,140 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-06-12 21:55:51,612 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2021-06-12 21:55:52,029 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2021-06-12 21:55:52,173 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-06-12 21:55:52,507 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2021-06-12 21:55:52,840 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 73 [2021-06-12 21:55:53,298 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 60 [2021-06-12 21:55:53,632 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 44 [2021-06-12 21:55:54,186 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 77 [2021-06-12 21:55:54,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:54,258 INFO L93 Difference]: Finished difference Result 2026 states and 6474 transitions. [2021-06-12 21:55:54,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 21:55:54,258 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:55:54,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:54,261 INFO L225 Difference]: With dead ends: 2026 [2021-06-12 21:55:54,261 INFO L226 Difference]: Without dead ends: 2011 [2021-06-12 21:55:54,261 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 6172.0ms TimeCoverageRelationStatistics Valid=321, Invalid=1749, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 21:55:54,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2021-06-12 21:55:54,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 1444. [2021-06-12 21:55:54,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 3.324324324324324) internal successors, (4797), 1443 states have internal predecessors, (4797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:54,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 4797 transitions. [2021-06-12 21:55:54,281 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 4797 transitions. Word has length 26 [2021-06-12 21:55:54,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:54,281 INFO L482 AbstractCegarLoop]: Abstraction has 1444 states and 4797 transitions. [2021-06-12 21:55:54,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:54,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 4797 transitions. [2021-06-12 21:55:54,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:55:54,283 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:54,284 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:55:54,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable451 [2021-06-12 21:55:54,497 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:54,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:54,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1506197498, now seen corresponding path program 9 times [2021-06-12 21:55:54,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:54,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123166582] [2021-06-12 21:55:54,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:54,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:55,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:55,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:55,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123166582] [2021-06-12 21:55:55,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123166582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:55,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767747959] [2021-06-12 21:55:55,058 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 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 [2021-06-12 21:55:55,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:55:55,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:55:55,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:55:55,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:55,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:55,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:55,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:55,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:55:55,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:55,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:55,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:55,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 21:55:55,704 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:55,866 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-06-12 21:55:55,866 INFO L628 ElimStorePlain]: treesize reduction 93, result has 59.6 percent of original size [2021-06-12 21:55:55,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:55,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:55,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:55,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:55:55,873 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:55,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:55,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:55:55,878 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:55,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:55,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:55,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:55,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:55:55,927 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:55,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:55,967 INFO L518 ElimStorePlain]: Eliminatee v_prenex_26 vanished before elimination [2021-06-12 21:55:55,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 21:55:55,970 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:285, output treesize:51 [2021-06-12 21:55:56,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:56,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767747959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:56,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:56,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 21:55:56,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058950452] [2021-06-12 21:55:56,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:55:56,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:56,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:55:56,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:55:56,027 INFO L87 Difference]: Start difference. First operand 1444 states and 4797 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 21:55:56,683 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2021-06-12 21:55:57,076 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-06-12 21:55:57,290 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 48 [2021-06-12 21:55:57,676 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 60 [2021-06-12 21:55:57,978 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-06-12 21:55:58,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:58,045 INFO L93 Difference]: Finished difference Result 2027 states and 6512 transitions. [2021-06-12 21:55:58,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 21:55:58,046 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-06-12 21:55:58,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:58,049 INFO L225 Difference]: With dead ends: 2027 [2021-06-12 21:55:58,049 INFO L226 Difference]: Without dead ends: 2012 [2021-06-12 21:55:58,049 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 2475.2ms TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 21:55:58,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2012 states. [2021-06-12 21:55:58,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2012 to 1454. [2021-06-12 21:55:58,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1453 states have (on average 3.3269098417068137) internal successors, (4834), 1453 states have internal predecessors, (4834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:58,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 4834 transitions. [2021-06-12 21:55:58,068 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 4834 transitions. Word has length 26 [2021-06-12 21:55:58,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:58,068 INFO L482 AbstractCegarLoop]: Abstraction has 1454 states and 4834 transitions. [2021-06-12 21:55:58,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 21:55:58,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 4834 transitions. [2021-06-12 21:55:58,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:55:58,070 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:58,070 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:55:58,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:55:58,271 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:58,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:58,271 INFO L82 PathProgramCache]: Analyzing trace with hash 247191222, now seen corresponding path program 10 times [2021-06-12 21:55:58,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:58,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569198695] [2021-06-12 21:55:58,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:58,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:58,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:58,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:58,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569198695] [2021-06-12 21:55:58,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569198695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:58,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331224596] [2021-06-12 21:55:58,709 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 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 [2021-06-12 21:55:58,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:55:58,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:55:58,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:55:58,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:58,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:58,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:58,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:58,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:58,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:59,002 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:55:59,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 21:55:59,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:59,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:59,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:59,020 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:59,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-06-12 21:55:59,023 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:59,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:59,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:59,045 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:55:59,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-06-12 21:55:59,048 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:59,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:59,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:59,063 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:55:59,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 21:55:59,064 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:59,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:59,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:59,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:59,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-06-12 21:55:59,083 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:59,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:59,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:59,096 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:55:59,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 21:55:59,096 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:59,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:59,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:59,107 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:55:59,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 21:55:59,108 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:59,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:59,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:59,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:59,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-06-12 21:55:59,125 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:59,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:59,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:59,137 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:55:59,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 21:55:59,138 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:59,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:59,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:59,152 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:59,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 24 [2021-06-12 21:55:59,166 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:59,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:59,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:59,182 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:55:59,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 21:55:59,183 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:59,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:59,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:59,197 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:55:59,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-12 21:55:59,198 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:59,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:59,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:59,212 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:55:59,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-06-12 21:55:59,213 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:59,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:59,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:59,224 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:55:59,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 21:55:59,225 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:59,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:59,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:59,246 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:59,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-06-12 21:55:59,247 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:59,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:59,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:59,256 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:55:59,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 20 [2021-06-12 21:55:59,258 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:59,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:59,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 21:55:59,329 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:729, output treesize:181 [2021-06-12 21:55:59,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:59,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331224596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:59,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:59,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 21:55:59,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557042139] [2021-06-12 21:55:59,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:55:59,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:59,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:55:59,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:55:59,527 INFO L87 Difference]: Start difference. First operand 1454 states and 4834 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:56:01,486 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2021-06-12 21:56:01,769 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 62 [2021-06-12 21:56:01,995 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 21:56:02,227 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-06-12 21:56:02,367 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-06-12 21:56:02,567 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2021-06-12 21:56:02,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:56:02,695 INFO L93 Difference]: Finished difference Result 2385 states and 7601 transitions. [2021-06-12 21:56:02,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 21:56:02,695 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:56:02,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:56:02,698 INFO L225 Difference]: With dead ends: 2385 [2021-06-12 21:56:02,699 INFO L226 Difference]: Without dead ends: 2355 [2021-06-12 21:56:02,699 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 3249.4ms TimeCoverageRelationStatistics Valid=381, Invalid=1781, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 21:56:02,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2021-06-12 21:56:02,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 1467. [2021-06-12 21:56:02,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1466 states have (on average 3.3342428376534787) internal successors, (4888), 1466 states have internal predecessors, (4888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:56:02,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 4888 transitions. [2021-06-12 21:56:02,731 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 4888 transitions. Word has length 26 [2021-06-12 21:56:02,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:56:02,731 INFO L482 AbstractCegarLoop]: Abstraction has 1467 states and 4888 transitions. [2021-06-12 21:56:02,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:56:02,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 4888 transitions. [2021-06-12 21:56:02,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:56:02,734 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:56:02,734 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:56:02,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-12 21:56:02,934 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:56:02,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:56:02,935 INFO L82 PathProgramCache]: Analyzing trace with hash 317421942, now seen corresponding path program 11 times [2021-06-12 21:56:02,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:56:02,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963045190] [2021-06-12 21:56:02,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:56:02,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:56:03,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:56:03,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:56:03,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963045190] [2021-06-12 21:56:03,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963045190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:56:03,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566939820] [2021-06-12 21:56:03,474 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 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 [2021-06-12 21:56:03,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:56:03,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:56:03,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:56:03,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:56:03,891 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-06-12 21:56:04,085 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 51 [2021-06-12 21:56:04,147 INFO L446 ElimStorePlain]: Different costs {1=[A, v_prenex_37], 2=[v_prenex_39, v_prenex_38]} [2021-06-12 21:56:04,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:04,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-12 21:56:04,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:04,257 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-12 21:56:04,258 INFO L628 ElimStorePlain]: treesize reduction 54, result has 72.0 percent of original size [2021-06-12 21:56:04,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:04,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:56:04,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:04,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:04,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:04,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:04,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:56:04,312 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:04,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:04,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:04,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:04,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:04,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:56:04,359 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:04,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:04,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:04,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:56:04,363 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:04,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:04,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 21:56:04,402 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:205, output treesize:51 [2021-06-12 21:56:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:56:04,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566939820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:56:04,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:56:04,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 21:56:04,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121475901] [2021-06-12 21:56:04,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:56:04,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:56:04,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:56:04,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:56:04,460 INFO L87 Difference]: Start difference. First operand 1467 states and 4888 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:56:05,052 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-06-12 21:56:05,277 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-06-12 21:56:05,609 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2021-06-12 21:56:05,853 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2021-06-12 21:56:06,314 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-06-12 21:56:06,696 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2021-06-12 21:56:06,900 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2021-06-12 21:56:07,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:56:07,045 INFO L93 Difference]: Finished difference Result 1957 states and 6396 transitions. [2021-06-12 21:56:07,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 21:56:07,046 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:56:07,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:56:07,048 INFO L225 Difference]: With dead ends: 1957 [2021-06-12 21:56:07,048 INFO L226 Difference]: Without dead ends: 1942 [2021-06-12 21:56:07,048 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 3049.3ms TimeCoverageRelationStatistics Valid=273, Invalid=1209, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:56:07,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2021-06-12 21:56:07,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 1470. [2021-06-12 21:56:07,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 3.3356024506466984) internal successors, (4900), 1469 states have internal predecessors, (4900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:56:07,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 4900 transitions. [2021-06-12 21:56:07,067 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 4900 transitions. Word has length 26 [2021-06-12 21:56:07,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:56:07,067 INFO L482 AbstractCegarLoop]: Abstraction has 1470 states and 4900 transitions. [2021-06-12 21:56:07,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:56:07,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 4900 transitions. [2021-06-12 21:56:07,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:56:07,069 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:56:07,069 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:56:07,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable524 [2021-06-12 21:56:07,270 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:56:07,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:56:07,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1300110838, now seen corresponding path program 12 times [2021-06-12 21:56:07,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:56:07,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974194145] [2021-06-12 21:56:07,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:56:07,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:56:07,620 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2021-06-12 21:56:07,751 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-06-12 21:56:07,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:56:07,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:56:07,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974194145] [2021-06-12 21:56:07,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974194145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:56:07,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107469653] [2021-06-12 21:56:07,810 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:56:07,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:56:07,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:56:07,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:56:07,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:56:08,161 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-06-12 21:56:08,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:08,219 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:56:08,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 21:56:08,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:08,334 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-12 21:56:08,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:08,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:08,346 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:08,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 21:56:08,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:08,453 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-12 21:56:08,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:08,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:08,465 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:08,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 21:56:08,467 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:08,573 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-12 21:56:08,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:08,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:08,585 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:56:08,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 21:56:08,586 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:08,688 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-12 21:56:08,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:08,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:08,700 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:56:08,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 21:56:08,702 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:08,802 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-12 21:56:08,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:08,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:08,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:08,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 21:56:08,817 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:08,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:08,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:08,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:08,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 21:56:08,923 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:09,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:09,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:09,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:09,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 21:56:09,028 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:09,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:09,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 21:56:09,120 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-06-12 21:56:09,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:56:09,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107469653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:56:09,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:56:09,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 21:56:09,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973468645] [2021-06-12 21:56:09,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:56:09,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:56:09,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:56:09,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:56:09,312 INFO L87 Difference]: Start difference. First operand 1470 states and 4900 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 21:56:09,643 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-06-12 21:56:10,071 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 47 [2021-06-12 21:56:10,423 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-06-12 21:56:10,711 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-06-12 21:56:10,997 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-06-12 21:56:11,212 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-12 21:56:11,410 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2021-06-12 21:56:11,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:56:11,511 INFO L93 Difference]: Finished difference Result 2349 states and 7518 transitions. [2021-06-12 21:56:11,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 21:56:11,511 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-06-12 21:56:11,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:56:11,515 INFO L225 Difference]: With dead ends: 2349 [2021-06-12 21:56:11,515 INFO L226 Difference]: Without dead ends: 2319 [2021-06-12 21:56:11,515 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2490.5ms TimeCoverageRelationStatistics Valid=255, Invalid=935, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:56:11,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2021-06-12 21:56:11,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 1476. [2021-06-12 21:56:11,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1475 states have (on average 3.3403389830508474) internal successors, (4927), 1475 states have internal predecessors, (4927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:56:11,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 4927 transitions. [2021-06-12 21:56:11,540 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 4927 transitions. Word has length 26 [2021-06-12 21:56:11,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:56:11,540 INFO L482 AbstractCegarLoop]: Abstraction has 1476 states and 4927 transitions. [2021-06-12 21:56:11,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 21:56:11,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 4927 transitions. [2021-06-12 21:56:11,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:56:11,542 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:56:11,542 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:56:11,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:56:11,743 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:56:11,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:56:11,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1219202938, now seen corresponding path program 39 times [2021-06-12 21:56:11,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:56:11,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844763021] [2021-06-12 21:56:11,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:56:11,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:56:12,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:56:12,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:56:12,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844763021] [2021-06-12 21:56:12,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844763021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:56:12,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488104629] [2021-06-12 21:56:12,184 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:56:12,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:56:12,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:56:12,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 21:56:12,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:56:12,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:12,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:12,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 19 [2021-06-12 21:56:12,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:12,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:12,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:12,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 7 [2021-06-12 21:56:12,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:12,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:12,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:12,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-12 21:56:12,569 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:12,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:12,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:12,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2021-06-12 21:56:12,579 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:12,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:12,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:12,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 19 [2021-06-12 21:56:12,589 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:12,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:12,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:12,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-06-12 21:56:12,599 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:12,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:12,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:12,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-06-12 21:56:12,609 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:12,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:12,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:12,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-06-12 21:56:12,619 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:12,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:12,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:12,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-06-12 21:56:12,629 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:12,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:12,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:12,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 16 [2021-06-12 21:56:12,639 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:12,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:12,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:12,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 13 [2021-06-12 21:56:12,649 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:12,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:12,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:12,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-06-12 21:56:12,658 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:12,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:12,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:12,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 13 [2021-06-12 21:56:12,668 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:12,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:12,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:12,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-06-12 21:56:12,678 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:12,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:12,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:12,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 13 [2021-06-12 21:56:12,686 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:12,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:12,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:12,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:12,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-12 21:56:12,692 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:12,731 INFO L628 ElimStorePlain]: treesize reduction 48, result has 49.5 percent of original size [2021-06-12 21:56:12,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:56:12,732 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:921, output treesize:47 [2021-06-12 21:56:12,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:56:12,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488104629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:56:12,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:56:12,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-12 21:56:12,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010102949] [2021-06-12 21:56:12,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:56:12,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:56:12,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:56:12,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:56:12,809 INFO L87 Difference]: Start difference. First operand 1476 states and 4927 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 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) [2021-06-12 21:56:13,181 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-06-12 21:56:13,379 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-06-12 21:56:13,675 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-06-12 21:56:13,824 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-06-12 21:56:13,994 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2021-06-12 21:56:14,572 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-06-12 21:56:15,005 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-06-12 21:56:15,232 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 67 [2021-06-12 21:56:15,785 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 62 [2021-06-12 21:56:15,973 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 50 [2021-06-12 21:56:16,498 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-12 21:56:16,672 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2021-06-12 21:56:16,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:56:16,966 INFO L93 Difference]: Finished difference Result 3196 states and 9983 transitions. [2021-06-12 21:56:16,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 21:56:16,966 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 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 26 [2021-06-12 21:56:16,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:56:16,971 INFO L225 Difference]: With dead ends: 3196 [2021-06-12 21:56:16,971 INFO L226 Difference]: Without dead ends: 3109 [2021-06-12 21:56:16,971 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 3958.2ms TimeCoverageRelationStatistics Valid=620, Invalid=3286, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 21:56:16,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2021-06-12 21:56:16,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 1509. [2021-06-12 21:56:16,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1509 states, 1508 states have (on average 3.343501326259947) internal successors, (5042), 1508 states have internal predecessors, (5042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:56:16,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1509 states to 1509 states and 5042 transitions. [2021-06-12 21:56:16,997 INFO L78 Accepts]: Start accepts. Automaton has 1509 states and 5042 transitions. Word has length 26 [2021-06-12 21:56:16,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:56:16,998 INFO L482 AbstractCegarLoop]: Abstraction has 1509 states and 5042 transitions. [2021-06-12 21:56:16,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 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) [2021-06-12 21:56:16,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1509 states and 5042 transitions. [2021-06-12 21:56:17,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:56:17,000 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:56:17,000 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:56:17,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable549 [2021-06-12 21:56:17,201 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:56:17,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:56:17,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1873451990, now seen corresponding path program 40 times [2021-06-12 21:56:17,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:56:17,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583293921] [2021-06-12 21:56:17,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:56:17,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:56:17,591 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-06-12 21:56:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:56:17,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:56:17,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583293921] [2021-06-12 21:56:17,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583293921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:56:17,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638634788] [2021-06-12 21:56:17,863 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:56:17,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:56:17,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:56:17,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 21:56:17,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:56:18,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:18,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:18,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-12 21:56:18,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:18,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:18,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:18,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-12 21:56:18,553 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:18,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:18,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:18,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-06-12 21:56:18,564 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:18,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:18,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:18,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-06-12 21:56:18,576 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:18,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:18,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:18,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-12 21:56:18,587 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:18,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:18,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:18,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-06-12 21:56:18,598 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:18,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:18,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:18,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-06-12 21:56:18,609 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:18,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:18,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:18,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-06-12 21:56:18,619 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:18,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:18,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:18,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-12 21:56:18,630 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:18,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:18,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:18,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-06-12 21:56:18,639 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:18,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:18,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:18,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-06-12 21:56:18,658 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:18,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:18,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:18,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-06-12 21:56:18,667 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:18,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:18,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:18,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-06-12 21:56:18,675 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:18,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:18,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:18,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-12 21:56:18,682 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:18,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:18,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:18,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-12 21:56:18,690 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:18,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:18,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:18,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:18,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-12 21:56:18,695 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:18,727 INFO L628 ElimStorePlain]: treesize reduction 38, result has 49.3 percent of original size [2021-06-12 21:56:18,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:56:18,728 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:31 [2021-06-12 21:56:18,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:56:18,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638634788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:56:18,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:56:18,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-12 21:56:18,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606471029] [2021-06-12 21:56:18,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:56:18,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:56:18,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:56:18,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:56:18,778 INFO L87 Difference]: Start difference. First operand 1509 states and 5042 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-06-12 21:56:19,311 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-06-12 21:56:19,631 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2021-06-12 21:56:19,780 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2021-06-12 21:56:20,242 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-06-12 21:56:20,719 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 70 [2021-06-12 21:56:21,008 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 61 [2021-06-12 21:56:21,492 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 43 [2021-06-12 21:56:21,640 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-06-12 21:56:21,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:56:21,873 INFO L93 Difference]: Finished difference Result 2965 states and 9388 transitions. [2021-06-12 21:56:21,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 21:56:21,874 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 26 [2021-06-12 21:56:21,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:56:21,878 INFO L225 Difference]: With dead ends: 2965 [2021-06-12 21:56:21,878 INFO L226 Difference]: Without dead ends: 2920 [2021-06-12 21:56:21,878 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 3288.6ms TimeCoverageRelationStatistics Valid=535, Invalid=2435, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 21:56:21,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2920 states. [2021-06-12 21:56:21,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2920 to 1512. [2021-06-12 21:56:21,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 3.345466578424884) internal successors, (5055), 1511 states have internal predecessors, (5055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:56:21,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 5055 transitions. [2021-06-12 21:56:21,902 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 5055 transitions. Word has length 26 [2021-06-12 21:56:21,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:56:21,902 INFO L482 AbstractCegarLoop]: Abstraction has 1512 states and 5055 transitions. [2021-06-12 21:56:21,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-06-12 21:56:21,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 5055 transitions. [2021-06-12 21:56:21,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:56:21,904 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:56:21,904 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:56:22,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-06-12 21:56:22,105 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:56:22,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:56:22,105 INFO L82 PathProgramCache]: Analyzing trace with hash -39803338, now seen corresponding path program 41 times [2021-06-12 21:56:22,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:56:22,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610058825] [2021-06-12 21:56:22,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:56:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:56:22,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:56:22,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:56:22,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610058825] [2021-06-12 21:56:22,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610058825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:56:22,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931944584] [2021-06-12 21:56:22,577 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:56:22,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:56:22,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:56:22,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 21:56:22,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:56:23,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,174 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-06-12 21:56:23,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 30 [2021-06-12 21:56:23,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:23,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,203 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-06-12 21:56:23,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 37 [2021-06-12 21:56:23,208 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:23,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,232 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:23,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 45 [2021-06-12 21:56:23,238 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:23,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,262 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-06-12 21:56:23,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-06-12 21:56:23,265 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:23,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,281 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:56:23,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 1 [2021-06-12 21:56:23,282 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:23,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,307 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-06-12 21:56:23,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 25 [2021-06-12 21:56:23,308 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:23,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,333 INFO L354 Elim1Store]: treesize reduction 26, result has 21.2 percent of original size [2021-06-12 21:56:23,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2021-06-12 21:56:23,334 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:23,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,352 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:56:23,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-12 21:56:23,353 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:23,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,370 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:56:23,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-06-12 21:56:23,371 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:23,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,387 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:56:23,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-12 21:56:23,388 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:23,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,404 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:56:23,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-06-12 21:56:23,405 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:23,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,431 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-06-12 21:56:23,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-06-12 21:56:23,432 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:23,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,465 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:56:23,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-12 21:56:23,466 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:23,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,487 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:56:23,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-12 21:56:23,488 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:23,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,517 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:56:23,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-12 21:56:23,523 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:23,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:23,536 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:56:23,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-12 21:56:23,537 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:23,640 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-06-12 21:56:23,640 INFO L628 ElimStorePlain]: treesize reduction 69, result has 64.2 percent of original size [2021-06-12 21:56:23,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 21:56:23,642 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:133 [2021-06-12 21:56:23,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:56:23,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931944584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:56:23,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:56:23,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-12 21:56:23,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385201355] [2021-06-12 21:56:23,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:56:23,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:56:23,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:56:23,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:56:23,778 INFO L87 Difference]: Start difference. First operand 1512 states and 5055 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-06-12 21:56:24,276 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-06-12 21:56:24,398 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-06-12 21:56:24,832 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2021-06-12 21:56:25,054 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-06-12 21:56:25,577 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2021-06-12 21:56:25,814 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2021-06-12 21:56:26,179 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2021-06-12 21:56:26,684 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 60 [2021-06-12 21:56:27,170 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2021-06-12 21:56:27,414 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2021-06-12 21:56:27,586 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2021-06-12 21:56:27,836 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2021-06-12 21:56:28,060 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 42 [2021-06-12 21:56:28,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:56:28,641 INFO L93 Difference]: Finished difference Result 3428 states and 10667 transitions. [2021-06-12 21:56:28,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 21:56:28,642 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 26 [2021-06-12 21:56:28,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:56:28,646 INFO L225 Difference]: With dead ends: 3428 [2021-06-12 21:56:28,647 INFO L226 Difference]: Without dead ends: 3368 [2021-06-12 21:56:28,647 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 4564.6ms TimeCoverageRelationStatistics Valid=833, Invalid=3457, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 21:56:28,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2021-06-12 21:56:28,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 1525. [2021-06-12 21:56:28,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1524 states have (on average 3.356299212598425) internal successors, (5115), 1524 states have internal predecessors, (5115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:56:28,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 5115 transitions. [2021-06-12 21:56:28,674 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 5115 transitions. Word has length 26 [2021-06-12 21:56:28,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:56:28,675 INFO L482 AbstractCegarLoop]: Abstraction has 1525 states and 5115 transitions. [2021-06-12 21:56:28,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-06-12 21:56:28,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 5115 transitions. [2021-06-12 21:56:28,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:56:28,677 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:56:28,677 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:56:28,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable682 [2021-06-12 21:56:28,878 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:56:28,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:56:28,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1882815202, now seen corresponding path program 13 times [2021-06-12 21:56:28,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:56:28,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097046811] [2021-06-12 21:56:28,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:56:28,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:56:29,273 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 32 [2021-06-12 21:56:29,476 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-06-12 21:56:29,647 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-06-12 21:56:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:56:29,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:56:29,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097046811] [2021-06-12 21:56:29,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097046811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:56:29,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708128012] [2021-06-12 21:56:29,767 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:56:29,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:56:29,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:56:29,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:56:30,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:30,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:30,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:30,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 21:56:30,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:30,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:30,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:30,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:30,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:56:30,168 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:30,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:30,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:30,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:30,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:56:30,175 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:30,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:30,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:30,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:30,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:56:30,182 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:30,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:30,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:30,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:30,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:56:30,189 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:30,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:30,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:30,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:30,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:56:30,197 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:30,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:30,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:30,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:30,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 21:56:30,204 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:30,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:30,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:30,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:30,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:56:30,211 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:30,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:30,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:30,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:30,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:56:30,219 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:30,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:30,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:30,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:30,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 21:56:30,226 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:30,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:30,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:30,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:30,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:56:30,235 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:30,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:30,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:30,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:30,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 21:56:30,242 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:30,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:30,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:30,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:30,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:56:30,248 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:30,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:30,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:30,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:30,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:56:30,255 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:30,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:30,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:30,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-06-12 21:56:30,260 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:30,349 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-12 21:56:30,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 21:56:30,352 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-12 21:56:30,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:56:30,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708128012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:56:30,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:56:30,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 21:56:30,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415421579] [2021-06-12 21:56:30,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:56:30,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:56:30,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:56:30,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:56:30,423 INFO L87 Difference]: Start difference. First operand 1525 states and 5115 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 21:56:31,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:56:31,276 INFO L93 Difference]: Finished difference Result 1908 states and 6274 transitions. [2021-06-12 21:56:31,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:56:31,276 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-06-12 21:56:31,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:56:31,279 INFO L225 Difference]: With dead ends: 1908 [2021-06-12 21:56:31,279 INFO L226 Difference]: Without dead ends: 1893 [2021-06-12 21:56:31,279 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1541.9ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:56:31,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2021-06-12 21:56:31,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 1533. [2021-06-12 21:56:31,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1532 states have (on average 3.352480417754569) internal successors, (5136), 1532 states have internal predecessors, (5136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:56:31,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 5136 transitions. [2021-06-12 21:56:31,299 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 5136 transitions. Word has length 26 [2021-06-12 21:56:31,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:56:31,299 INFO L482 AbstractCegarLoop]: Abstraction has 1533 states and 5136 transitions. [2021-06-12 21:56:31,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 21:56:31,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 5136 transitions. [2021-06-12 21:56:31,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:56:31,302 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:56:31,302 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:56:31,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable795 [2021-06-12 21:56:31,502 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:56:31,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:56:31,502 INFO L82 PathProgramCache]: Analyzing trace with hash 950706158, now seen corresponding path program 14 times [2021-06-12 21:56:31,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:56:31,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817583379] [2021-06-12 21:56:31,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:56:31,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:56:31,730 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-06-12 21:56:32,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:56:32,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:56:32,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817583379] [2021-06-12 21:56:32,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817583379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:56:32,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129393074] [2021-06-12 21:56:32,157 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:56:32,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:56:32,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:56:32,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 21:56:32,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:56:32,517 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-06-12 21:56:32,600 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_60, v_prenex_62], 3=[A, v_prenex_54, v_prenex_64, v_prenex_58, v_prenex_56, v_prenex_66]} [2021-06-12 21:56:32,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:32,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 21:56:32,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:32,820 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-06-12 21:56:32,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:32,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:32,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 21:56:32,848 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:33,009 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-12 21:56:33,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:33,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:33,032 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-12 21:56:33,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-06-12 21:56:33,036 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:33,178 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-12 21:56:33,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:33,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:33,199 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-12 21:56:33,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-06-12 21:56:33,203 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:33,346 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-06-12 21:56:33,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:33,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:33,366 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-12 21:56:33,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 26 [2021-06-12 21:56:33,368 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:33,499 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-12 21:56:33,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:33,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:33,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:33,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2021-06-12 21:56:33,520 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:33,645 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-12 21:56:33,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:33,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:33,663 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-12 21:56:33,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 23 [2021-06-12 21:56:33,664 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:33,789 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-12 21:56:33,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:33,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:33,808 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-12 21:56:33,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-06-12 21:56:33,810 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:33,936 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-12 21:56:33,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:33,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 21:56:33,967 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:391, output treesize:457 [2021-06-12 21:56:34,269 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-06-12 21:56:34,476 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-06-12 21:56:34,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:56:34,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129393074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:56:34,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:56:34,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 21:56:34,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296893734] [2021-06-12 21:56:34,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:56:34,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:56:34,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:56:34,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:56:34,573 INFO L87 Difference]: Start difference. First operand 1533 states and 5136 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:56:34,824 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 21 [2021-06-12 21:56:35,552 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 45 [2021-06-12 21:56:35,977 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-12 21:56:36,546 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 99 [2021-06-12 21:56:36,747 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-06-12 21:56:37,171 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-06-12 21:56:37,597 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2021-06-12 21:56:37,944 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 47 [2021-06-12 21:56:38,181 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2021-06-12 21:56:38,657 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 72 [2021-06-12 21:56:38,883 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 34 [2021-06-12 21:56:38,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:56:38,939 INFO L93 Difference]: Finished difference Result 2211 states and 7083 transitions. [2021-06-12 21:56:38,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 21:56:38,939 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:56:38,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:56:38,942 INFO L225 Difference]: With dead ends: 2211 [2021-06-12 21:56:38,942 INFO L226 Difference]: Without dead ends: 2181 [2021-06-12 21:56:38,942 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 5045.1ms TimeCoverageRelationStatistics Valid=256, Invalid=1384, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 21:56:38,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2021-06-12 21:56:38,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 1518. [2021-06-12 21:56:38,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 3.3513513513513513) internal successors, (5084), 1517 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:56:38,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 5084 transitions. [2021-06-12 21:56:38,974 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 5084 transitions. Word has length 26 [2021-06-12 21:56:38,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:56:38,975 INFO L482 AbstractCegarLoop]: Abstraction has 1518 states and 5084 transitions. [2021-06-12 21:56:38,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:56:38,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 5084 transitions. [2021-06-12 21:56:38,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:56:38,980 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:56:38,980 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:56:39,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable825,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:56:39,201 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:56:39,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:56:39,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1721464722, now seen corresponding path program 15 times [2021-06-12 21:56:39,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:56:39,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673608328] [2021-06-12 21:56:39,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:56:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:56:39,479 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-06-12 21:56:39,756 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-06-12 21:56:39,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:56:39,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:56:39,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673608328] [2021-06-12 21:56:39,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673608328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:56:39,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691972030] [2021-06-12 21:56:39,931 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:56:39,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:56:39,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:56:39,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 21:56:39,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:56:40,273 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 21:56:40,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 21:56:40,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:40,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:40,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 21:56:40,292 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:40,309 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 21:56:40,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 21:56:40,310 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:40,327 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 21:56:40,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 21:56:40,329 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:40,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:40,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-12 21:56:40,349 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:40,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:40,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 21:56:40,366 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:40,375 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 21:56:40,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:56:40,376 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:40,389 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 21:56:40,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 21:56:40,390 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:40,403 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 21:56:40,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:56:40,405 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:40,417 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 21:56:40,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:56:40,418 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:40,445 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 21:56:40,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-12 21:56:40,450 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:40,476 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 21:56:40,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-12 21:56:40,481 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:40,494 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 21:56:40,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 21:56:40,496 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:40,507 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 21:56:40,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:56:40,508 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:40,520 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 21:56:40,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 21:56:40,521 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:40,538 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 21:56:40,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-12 21:56:40,541 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:40,668 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-06-12 21:56:40,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:40,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 21:56:40,692 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:737, output treesize:430 [2021-06-12 21:56:40,916 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-06-12 21:56:41,141 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-06-12 21:56:41,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:56:41,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691972030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:56:41,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:56:41,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-12 21:56:41,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595766667] [2021-06-12 21:56:41,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:56:41,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:56:41,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:56:41,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:56:41,254 INFO L87 Difference]: Start difference. First operand 1518 states and 5084 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:56:42,246 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2021-06-12 21:56:42,394 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 46 [2021-06-12 21:56:42,572 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 49 [2021-06-12 21:56:42,814 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 57 [2021-06-12 21:56:42,968 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-06-12 21:56:43,176 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-06-12 21:56:43,419 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-12 21:56:43,668 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-06-12 21:56:43,945 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-06-12 21:56:44,232 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2021-06-12 21:56:44,410 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 34 [2021-06-12 21:56:44,652 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 47 [2021-06-12 21:56:44,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:56:44,721 INFO L93 Difference]: Finished difference Result 2207 states and 7076 transitions. [2021-06-12 21:56:44,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 21:56:44,722 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:56:44,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:56:44,724 INFO L225 Difference]: With dead ends: 2207 [2021-06-12 21:56:44,725 INFO L226 Difference]: Without dead ends: 2192 [2021-06-12 21:56:44,725 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 4099.9ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 21:56:44,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2021-06-12 21:56:44,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 1522. [2021-06-12 21:56:44,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 3.356344510190664) internal successors, (5105), 1521 states have internal predecessors, (5105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:56:44,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 5105 transitions. [2021-06-12 21:56:44,747 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 5105 transitions. Word has length 26 [2021-06-12 21:56:44,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:56:44,747 INFO L482 AbstractCegarLoop]: Abstraction has 1522 states and 5105 transitions. [2021-06-12 21:56:44,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:56:44,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 5105 transitions. [2021-06-12 21:56:44,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:56:44,749 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:56:44,749 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:56:44,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable856,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:56:44,953 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:56:44,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:56:44,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1741432748, now seen corresponding path program 16 times [2021-06-12 21:56:44,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:56:44,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521752184] [2021-06-12 21:56:44,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:56:44,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:56:45,307 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2021-06-12 21:56:45,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:56:45,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:56:45,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521752184] [2021-06-12 21:56:45,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521752184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:56:45,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22371966] [2021-06-12 21:56:45,420 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:56:45,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:56:45,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:56:45,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:56:45,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:56:45,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:45,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:45,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 21:56:45,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:45,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:45,735 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:45,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 21:56:45,737 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:45,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:45,748 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:45,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 21:56:45,749 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:45,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:45,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:45,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 21:56:45,761 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:45,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:45,770 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:56:45,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 21:56:45,771 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:45,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:45,780 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:56:45,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:56:45,781 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:45,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:45,790 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:56:45,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 21:56:45,791 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:45,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:45,799 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:56:45,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:56:45,800 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:45,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:45,811 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:45,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 21:56:45,814 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:45,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:45,825 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:56:45,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 21:56:45,826 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:45,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:45,838 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:56:45,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 21:56:45,839 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:45,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:45,847 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:56:45,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:56:45,848 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:45,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:45,858 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:56:45,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 21:56:45,860 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:45,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:45,871 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:56:45,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:56:45,873 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:45,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:45,881 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:56:45,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 21:56:45,881 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:45,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:45,887 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:56:45,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 21:56:45,888 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:45,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:45,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 21:56:45,985 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:705, output treesize:180 [2021-06-12 21:56:46,137 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-06-12 21:56:46,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:56:46,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22371966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:56:46,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:56:46,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 21:56:46,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327298181] [2021-06-12 21:56:46,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:56:46,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:56:46,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:56:46,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:56:46,232 INFO L87 Difference]: Start difference. First operand 1522 states and 5105 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:56:47,005 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-06-12 21:56:47,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:56:47,042 INFO L93 Difference]: Finished difference Result 2055 states and 6709 transitions. [2021-06-12 21:56:47,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:56:47,042 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:56:47,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:56:47,045 INFO L225 Difference]: With dead ends: 2055 [2021-06-12 21:56:47,045 INFO L226 Difference]: Without dead ends: 2040 [2021-06-12 21:56:47,045 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1252.4ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:56:47,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2021-06-12 21:56:47,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1529. [2021-06-12 21:56:47,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.356020942408377) internal successors, (5128), 1528 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:56:47,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5128 transitions. [2021-06-12 21:56:47,069 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5128 transitions. Word has length 26 [2021-06-12 21:56:47,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:56:47,069 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5128 transitions. [2021-06-12 21:56:47,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:56:47,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5128 transitions. [2021-06-12 21:56:47,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:56:47,071 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:56:47,071 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:56:47,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable911,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:56:47,272 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:56:47,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:56:47,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1484642536, now seen corresponding path program 17 times [2021-06-12 21:56:47,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:56:47,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911927177] [2021-06-12 21:56:47,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:56:47,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:56:47,572 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-06-12 21:56:47,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:56:47,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:56:47,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911927177] [2021-06-12 21:56:47,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911927177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:56:47,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521089281] [2021-06-12 21:56:47,799 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:56:47,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:56:47,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:56:47,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 21:56:47,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:56:48,151 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-06-12 21:56:48,381 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2021-06-12 21:56:48,448 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_76], 2=[A, v_prenex_75]} [2021-06-12 21:56:48,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:48,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:56:48,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:48,554 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-06-12 21:56:48,554 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-06-12 21:56:48,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:48,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:48,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:56:48,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:48,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:48,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:48,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:48,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:48,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:56:48,607 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:48,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:48,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:48,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:56:48,611 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:48,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:48,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 21:56:48,647 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-06-12 21:56:48,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:56:48,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521089281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:56:48,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:56:48,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 21:56:48,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124147823] [2021-06-12 21:56:48,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:56:48,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:56:48,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:56:48,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:56:48,703 INFO L87 Difference]: Start difference. First operand 1529 states and 5128 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:56:49,397 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2021-06-12 21:56:49,843 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-12 21:56:50,184 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-06-12 21:56:50,365 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-06-12 21:56:50,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:56:50,514 INFO L93 Difference]: Finished difference Result 2067 states and 6781 transitions. [2021-06-12 21:56:50,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 21:56:50,514 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:56:50,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:56:50,517 INFO L225 Difference]: With dead ends: 2067 [2021-06-12 21:56:50,517 INFO L226 Difference]: Without dead ends: 2052 [2021-06-12 21:56:50,517 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 2326.1ms TimeCoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:56:50,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2021-06-12 21:56:50,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 1532. [2021-06-12 21:56:50,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1531 states have (on average 3.357282821685173) internal successors, (5140), 1531 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:56:50,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 5140 transitions. [2021-06-12 21:56:50,545 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 5140 transitions. Word has length 26 [2021-06-12 21:56:50,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:56:50,545 INFO L482 AbstractCegarLoop]: Abstraction has 1532 states and 5140 transitions. [2021-06-12 21:56:50,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:56:50,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 5140 transitions. [2021-06-12 21:56:50,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:56:50,548 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:56:50,549 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:56:50,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable952 [2021-06-12 21:56:50,772 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:56:50,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:56:50,772 INFO L82 PathProgramCache]: Analyzing trace with hash -808425550, now seen corresponding path program 18 times [2021-06-12 21:56:50,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:56:50,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944720424] [2021-06-12 21:56:50,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:56:50,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:56:51,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:56:51,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:56:51,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944720424] [2021-06-12 21:56:51,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944720424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:56:51,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048148195] [2021-06-12 21:56:51,220 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:56:51,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:56:51,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:56:51,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:56:51,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:56:51,699 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-12 21:56:51,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:51,908 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:51,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 21:56:51,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:52,244 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 150 [2021-06-12 21:56:52,244 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.8 percent of original size [2021-06-12 21:56:52,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:52,269 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 21:56:52,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-06-12 21:56:52,270 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:52,400 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-06-12 21:56:52,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:52,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:52,423 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:52,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-12 21:56:52,433 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:52,560 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-06-12 21:56:52,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:52,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:52,590 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:52,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-12 21:56:52,596 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:52,826 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 132 [2021-06-12 21:56:52,827 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.1 percent of original size [2021-06-12 21:56:52,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:52,846 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 21:56:52,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 21:56:52,848 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:52,964 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-06-12 21:56:52,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:52,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:52,985 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 21:56:52,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-12 21:56:52,987 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:53,101 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-12 21:56:53,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:53,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:53,121 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 21:56:53,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-12 21:56:53,124 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:53,234 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-12 21:56:53,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:53,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:53,253 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 21:56:53,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 21:56:53,254 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:53,361 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-12 21:56:53,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:53,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 21:56:53,383 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:365, output treesize:256 [2021-06-12 21:56:53,568 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-12 21:56:53,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:56:53,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048148195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:56:53,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:56:53,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 21:56:53,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717680556] [2021-06-12 21:56:53,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:56:53,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:56:53,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:56:53,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:56:53,665 INFO L87 Difference]: Start difference. First operand 1532 states and 5140 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 21:56:54,345 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-06-12 21:56:54,629 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2021-06-12 21:56:55,213 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 122 [2021-06-12 21:56:55,468 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-06-12 21:56:55,813 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-12 21:56:56,356 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 117 [2021-06-12 21:56:56,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:56:56,425 INFO L93 Difference]: Finished difference Result 2080 states and 6806 transitions. [2021-06-12 21:56:56,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 21:56:56,425 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-06-12 21:56:56,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:56:56,428 INFO L225 Difference]: With dead ends: 2080 [2021-06-12 21:56:56,428 INFO L226 Difference]: Without dead ends: 2065 [2021-06-12 21:56:56,428 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 3265.5ms TimeCoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:56:56,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2065 states. [2021-06-12 21:56:56,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2065 to 1529. [2021-06-12 21:56:56,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.356020942408377) internal successors, (5128), 1528 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:56:56,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5128 transitions. [2021-06-12 21:56:56,447 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5128 transitions. Word has length 26 [2021-06-12 21:56:56,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:56:56,447 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5128 transitions. [2021-06-12 21:56:56,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 21:56:56,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5128 transitions. [2021-06-12 21:56:56,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:56:56,449 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:56:56,449 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:56:56,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable962,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:56:56,650 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:56:56,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:56:56,650 INFO L82 PathProgramCache]: Analyzing trace with hash -2091148486, now seen corresponding path program 19 times [2021-06-12 21:56:56,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:56:56,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973904875] [2021-06-12 21:56:56,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:56:56,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:56:57,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:56:57,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:56:57,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973904875] [2021-06-12 21:56:57,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973904875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:56:57,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300609488] [2021-06-12 21:56:57,074 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:56:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:56:57,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 21:56:57,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:56:57,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:57,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:57,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:57,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:56:57,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:57,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:57,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:57,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:57,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:56:57,450 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:57,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:57,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:57,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:57,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 21:56:57,456 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:57,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:57,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:57,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:57,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:56:57,462 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:57,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:57,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:57,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:57,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:56:57,468 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:57,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:57,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:57,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:57,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 21:56:57,474 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:57,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:57,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:57,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:57,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:56:57,480 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:57,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:57,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:57,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:57,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-06-12 21:56:57,486 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:57,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:57,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:57,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:57,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 21:56:57,492 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:57,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:57,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:57,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:57,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:56:57,498 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:57,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:57,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:57,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:57,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:56:57,505 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:57,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:57,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:57,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:57,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:56:57,512 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:57,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:57,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:57,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:57,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:56:57,518 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:57,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:57,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:57,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:57,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 21:56:57,523 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:57,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:56:57,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:56:57,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:56:57,527 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:57,598 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-12 21:56:57,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 21:56:57,600 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-12 21:56:57,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:56:57,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300609488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:56:57,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:56:57,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 21:56:57,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259562768] [2021-06-12 21:56:57,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:56:57,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:56:57,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:56:57,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:56:57,649 INFO L87 Difference]: Start difference. First operand 1529 states and 5128 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 21:56:58,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:56:58,512 INFO L93 Difference]: Finished difference Result 1986 states and 6507 transitions. [2021-06-12 21:56:58,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:56:58,512 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-06-12 21:56:58,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:56:58,515 INFO L225 Difference]: With dead ends: 1986 [2021-06-12 21:56:58,515 INFO L226 Difference]: Without dead ends: 1965 [2021-06-12 21:56:58,515 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1161.2ms TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:56:58,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2021-06-12 21:56:58,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1570. [2021-06-12 21:56:58,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1569 states have (on average 3.3524537922243467) internal successors, (5260), 1569 states have internal predecessors, (5260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:56:58,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 5260 transitions. [2021-06-12 21:56:58,538 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 5260 transitions. Word has length 26 [2021-06-12 21:56:58,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:56:58,538 INFO L482 AbstractCegarLoop]: Abstraction has 1570 states and 5260 transitions. [2021-06-12 21:56:58,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 21:56:58,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 5260 transitions. [2021-06-12 21:56:58,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:56:58,541 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:56:58,541 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:56:58,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable994 [2021-06-12 21:56:58,741 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:56:58,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:56:58,742 INFO L82 PathProgramCache]: Analyzing trace with hash 2036009718, now seen corresponding path program 20 times [2021-06-12 21:56:58,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:56:58,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575704590] [2021-06-12 21:56:58,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:56:58,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:56:59,040 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-06-12 21:56:59,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:56:59,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:56:59,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575704590] [2021-06-12 21:56:59,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575704590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:56:59,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447937773] [2021-06-12 21:56:59,284 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:56:59,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:56:59,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:56:59,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 21:56:59,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:56:59,707 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 21:56:59,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:56:59,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:59,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:59,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-12 21:56:59,732 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:59,743 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 21:56:59,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:56:59,744 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:59,763 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 21:56:59,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-12 21:56:59,767 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:59,784 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 21:56:59,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 21:56:59,786 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:59,805 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 21:56:59,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-12 21:56:59,806 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:59,816 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 21:56:59,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 21:56:59,817 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:59,826 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 21:56:59,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 21:56:59,826 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:59,843 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 21:56:59,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 21:56:59,845 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:59,864 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 21:56:59,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-12 21:56:59,867 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:59,876 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 21:56:59,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 21:56:59,877 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:59,886 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 21:56:59,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:56:59,886 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:59,895 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 21:56:59,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 21:56:59,896 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:59,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:59,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 21:56:59,918 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:59,932 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:56:59,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 21:56:59,933 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 21:56:59,939 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 21:56:59,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:56:59,940 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:00,044 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-06-12 21:57:00,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:00,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 21:57:00,056 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:737, output treesize:407 [2021-06-12 21:57:00,291 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-06-12 21:57:00,502 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-06-12 21:57:00,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:00,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447937773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:00,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:57:00,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-12 21:57:00,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555935633] [2021-06-12 21:57:00,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:57:00,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:57:00,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:57:00,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:57:00,614 INFO L87 Difference]: Start difference. First operand 1570 states and 5260 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:01,264 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-12 21:57:01,625 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-06-12 21:57:01,790 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-12 21:57:02,289 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2021-06-12 21:57:03,005 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 34 [2021-06-12 21:57:03,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:57:03,076 INFO L93 Difference]: Finished difference Result 2168 states and 6948 transitions. [2021-06-12 21:57:03,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 21:57:03,076 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:57:03,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:57:03,079 INFO L225 Difference]: With dead ends: 2168 [2021-06-12 21:57:03,079 INFO L226 Difference]: Without dead ends: 2143 [2021-06-12 21:57:03,079 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 3115.9ms TimeCoverageRelationStatistics Valid=242, Invalid=1318, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 21:57:03,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2021-06-12 21:57:03,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 1584. [2021-06-12 21:57:03,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1583 states have (on average 3.360707517372078) internal successors, (5320), 1583 states have internal predecessors, (5320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:03,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 5320 transitions. [2021-06-12 21:57:03,109 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 5320 transitions. Word has length 26 [2021-06-12 21:57:03,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:57:03,109 INFO L482 AbstractCegarLoop]: Abstraction has 1584 states and 5320 transitions. [2021-06-12 21:57:03,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:03,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 5320 transitions. [2021-06-12 21:57:03,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:57:03,112 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:57:03,112 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:57:03,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1022 [2021-06-12 21:57:03,317 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:57:03,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:57:03,317 INFO L82 PathProgramCache]: Analyzing trace with hash 2016041692, now seen corresponding path program 21 times [2021-06-12 21:57:03,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:57:03,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581231867] [2021-06-12 21:57:03,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:57:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:57:03,514 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2021-06-12 21:57:03,652 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 40 [2021-06-12 21:57:03,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:03,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:57:03,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581231867] [2021-06-12 21:57:03,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581231867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:03,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032040179] [2021-06-12 21:57:03,838 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:03,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:57:03,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:57:03,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:57:03,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:57:04,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:04,207 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:57:04,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 21:57:04,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:04,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:04,222 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:57:04,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 21:57:04,224 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:04,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:04,235 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:04,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 21:57:04,237 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:04,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:04,246 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:57:04,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:57:04,247 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:04,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:04,258 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:57:04,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 21:57:04,259 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:04,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:04,268 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:57:04,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:57:04,269 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:04,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:04,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:04,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 21:57:04,283 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:04,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:04,292 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:57:04,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 21:57:04,293 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:04,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:04,301 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:57:04,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:57:04,302 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:04,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:04,311 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:57:04,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 21:57:04,312 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:04,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:04,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:04,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 21:57:04,327 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:04,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:04,338 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:57:04,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 21:57:04,340 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:04,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:04,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:04,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 21:57:04,353 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:04,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:04,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:04,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 21:57:04,368 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:04,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:04,376 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:57:04,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:57:04,377 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:04,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:04,383 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:57:04,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 21:57:04,384 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:04,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:04,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 21:57:04,495 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-06-12 21:57:04,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:04,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032040179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:04,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:57:04,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-12 21:57:04,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488020831] [2021-06-12 21:57:04,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:57:04,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:57:04,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:57:04,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:57:04,690 INFO L87 Difference]: Start difference. First operand 1584 states and 5320 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:05,552 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-06-12 21:57:05,993 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-06-12 21:57:06,233 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 21:57:06,549 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-06-12 21:57:06,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:57:06,602 INFO L93 Difference]: Finished difference Result 2090 states and 6847 transitions. [2021-06-12 21:57:06,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 21:57:06,602 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:57:06,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:57:06,605 INFO L225 Difference]: With dead ends: 2090 [2021-06-12 21:57:06,606 INFO L226 Difference]: Without dead ends: 2061 [2021-06-12 21:57:06,606 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 2253.7ms TimeCoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 21:57:06,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-06-12 21:57:06,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1587. [2021-06-12 21:57:06,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 3.3612862547288778) internal successors, (5331), 1586 states have internal predecessors, (5331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:06,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 5331 transitions. [2021-06-12 21:57:06,627 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 5331 transitions. Word has length 26 [2021-06-12 21:57:06,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:57:06,627 INFO L482 AbstractCegarLoop]: Abstraction has 1587 states and 5331 transitions. [2021-06-12 21:57:06,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:06,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 5331 transitions. [2021-06-12 21:57:06,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:57:06,630 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:57:06,630 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:57:06,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1071,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:06,830 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:57:06,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:57:06,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1960184130, now seen corresponding path program 22 times [2021-06-12 21:57:06,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:57:06,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677040298] [2021-06-12 21:57:06,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:57:06,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:57:07,068 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2021-06-12 21:57:07,236 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 44 [2021-06-12 21:57:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:07,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:57:07,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677040298] [2021-06-12 21:57:07,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677040298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:07,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052188337] [2021-06-12 21:57:07,501 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:07,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:57:07,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:57:07,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:57:07,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:57:07,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:07,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:07,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:07,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:57:07,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:07,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:07,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:07,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:57:07,818 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:07,919 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-06-12 21:57:07,920 INFO L628 ElimStorePlain]: treesize reduction 121, result has 46.0 percent of original size [2021-06-12 21:57:07,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:07,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:57:07,927 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:07,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:07,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:07,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:07,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:57:07,969 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:08,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:08,004 INFO L518 ElimStorePlain]: Eliminatee v_prenex_113 vanished before elimination [2021-06-12 21:57:08,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 21:57:08,007 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:264, output treesize:51 [2021-06-12 21:57:08,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:08,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052188337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:08,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:57:08,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 21:57:08,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958809589] [2021-06-12 21:57:08,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:57:08,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:57:08,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:57:08,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:57:08,064 INFO L87 Difference]: Start difference. First operand 1587 states and 5331 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:08,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:57:08,385 INFO L93 Difference]: Finished difference Result 1662 states and 5522 transitions. [2021-06-12 21:57:08,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:57:08,386 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:57:08,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:57:08,388 INFO L225 Difference]: With dead ends: 1662 [2021-06-12 21:57:08,388 INFO L226 Difference]: Without dead ends: 1647 [2021-06-12 21:57:08,388 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 849.5ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:57:08,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-06-12 21:57:08,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1593. [2021-06-12 21:57:08,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1592 states have (on average 3.363065326633166) internal successors, (5354), 1592 states have internal predecessors, (5354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:08,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 5354 transitions. [2021-06-12 21:57:08,405 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 5354 transitions. Word has length 26 [2021-06-12 21:57:08,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:57:08,405 INFO L482 AbstractCegarLoop]: Abstraction has 1593 states and 5354 transitions. [2021-06-12 21:57:08,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:08,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 5354 transitions. [2021-06-12 21:57:08,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:57:08,407 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:57:08,407 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:57:08,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1112,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:08,608 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:57:08,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:57:08,608 INFO L82 PathProgramCache]: Analyzing trace with hash -389358530, now seen corresponding path program 23 times [2021-06-12 21:57:08,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:57:08,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228684571] [2021-06-12 21:57:08,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:57:08,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:57:08,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:08,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:57:08,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228684571] [2021-06-12 21:57:08,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228684571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:08,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655228494] [2021-06-12 21:57:08,983 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:09,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:57:09,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:57:09,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 21:57:09,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:57:09,342 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_115, v_prenex_117], 3=[A, v_prenex_119]} [2021-06-12 21:57:09,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:09,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:09,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 21:57:09,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:09,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:09,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:09,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 21:57:09,373 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:09,509 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-12 21:57:09,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:09,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:09,523 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:57:09,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 21:57:09,525 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:09,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:09,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:09,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 21:57:09,536 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:09,661 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-12 21:57:09,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:09,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:09,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:09,675 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-12 21:57:09,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-06-12 21:57:09,677 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:09,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:09,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:09,688 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:09,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-06-12 21:57:09,691 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:09,803 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-06-12 21:57:09,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:09,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:09,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:09,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:09,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-12 21:57:09,820 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:09,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:09,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:09,830 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-12 21:57:09,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-06-12 21:57:09,831 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:09,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:09,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 21:57:09,936 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:349, output treesize:194 [2021-06-12 21:57:10,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:10,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655228494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:10,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:57:10,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 21:57:10,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325011244] [2021-06-12 21:57:10,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:57:10,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:57:10,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:57:10,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:57:10,144 INFO L87 Difference]: Start difference. First operand 1593 states and 5354 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:11,374 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-06-12 21:57:11,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:57:11,442 INFO L93 Difference]: Finished difference Result 2262 states and 7355 transitions. [2021-06-12 21:57:11,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:57:11,442 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:57:11,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:57:11,445 INFO L225 Difference]: With dead ends: 2262 [2021-06-12 21:57:11,445 INFO L226 Difference]: Without dead ends: 2212 [2021-06-12 21:57:11,445 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1532.0ms TimeCoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:57:11,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-06-12 21:57:11,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1600. [2021-06-12 21:57:11,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 3.367104440275172) internal successors, (5384), 1599 states have internal predecessors, (5384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:11,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 5384 transitions. [2021-06-12 21:57:11,465 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 5384 transitions. Word has length 26 [2021-06-12 21:57:11,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:57:11,465 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 5384 transitions. [2021-06-12 21:57:11,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:11,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 5384 transitions. [2021-06-12 21:57:11,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:57:11,467 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:57:11,467 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:57:11,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1123 [2021-06-12 21:57:11,668 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:57:11,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:57:11,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1800748254, now seen corresponding path program 24 times [2021-06-12 21:57:11,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:57:11,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458562398] [2021-06-12 21:57:11,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:57:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:57:11,921 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2021-06-12 21:57:12,051 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2021-06-12 21:57:12,199 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-06-12 21:57:12,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:12,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:57:12,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458562398] [2021-06-12 21:57:12,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458562398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:12,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251537083] [2021-06-12 21:57:12,378 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:12,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:57:12,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:57:12,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 21:57:12,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:57:12,846 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-12 21:57:13,036 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-06-12 21:57:13,115 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_129], 2=[A, v_prenex_128]} [2021-06-12 21:57:13,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:13,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:57:13,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:13,228 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-06-12 21:57:13,228 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-06-12 21:57:13,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:13,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:13,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:57:13,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:13,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:13,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:13,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:13,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:13,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:57:13,293 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:13,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:13,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:13,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:57:13,297 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:13,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:13,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 21:57:13,334 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-06-12 21:57:13,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:13,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251537083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:13,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:57:13,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 21:57:13,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743360104] [2021-06-12 21:57:13,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:57:13,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:57:13,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:57:13,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:57:13,392 INFO L87 Difference]: Start difference. First operand 1600 states and 5384 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 21:57:14,262 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-12 21:57:14,631 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 76 [2021-06-12 21:57:14,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:57:14,735 INFO L93 Difference]: Finished difference Result 1991 states and 6587 transitions. [2021-06-12 21:57:14,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:57:14,736 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-06-12 21:57:14,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:57:14,738 INFO L225 Difference]: With dead ends: 1991 [2021-06-12 21:57:14,738 INFO L226 Difference]: Without dead ends: 1976 [2021-06-12 21:57:14,738 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 2165.7ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:57:14,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2021-06-12 21:57:14,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1611. [2021-06-12 21:57:14,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1610 states have (on average 3.3670807453416147) internal successors, (5421), 1610 states have internal predecessors, (5421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:14,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 5421 transitions. [2021-06-12 21:57:14,757 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 5421 transitions. Word has length 26 [2021-06-12 21:57:14,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:57:14,757 INFO L482 AbstractCegarLoop]: Abstraction has 1611 states and 5421 transitions. [2021-06-12 21:57:14,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 21:57:14,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 5421 transitions. [2021-06-12 21:57:14,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:57:14,759 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:57:14,759 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:57:14,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1154 [2021-06-12 21:57:14,960 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:57:14,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:57:14,960 INFO L82 PathProgramCache]: Analyzing trace with hash 183215474, now seen corresponding path program 25 times [2021-06-12 21:57:14,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:57:14,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438206541] [2021-06-12 21:57:14,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:57:14,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:57:15,178 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-06-12 21:57:15,314 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2021-06-12 21:57:15,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:15,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:57:15,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438206541] [2021-06-12 21:57:15,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438206541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:15,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921724512] [2021-06-12 21:57:15,522 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:15,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:57:15,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:57:15,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:57:15,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:15,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:15,778 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:57:15,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 21:57:15,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:15,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:15,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:15,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:15,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-06-12 21:57:15,794 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:15,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:15,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:15,809 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:57:15,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-06-12 21:57:15,810 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:15,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:15,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:15,822 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:57:15,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 21:57:15,823 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:15,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:15,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:15,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:15,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-06-12 21:57:15,839 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:15,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:15,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:15,850 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:57:15,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 21:57:15,851 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:15,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:15,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:15,861 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:57:15,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 21:57:15,862 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:15,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:15,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:15,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:15,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-06-12 21:57:15,878 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:15,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:15,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:15,891 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:57:15,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 21:57:15,891 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:15,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:15,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:15,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:15,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 24 [2021-06-12 21:57:15,909 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:15,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:15,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:15,927 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:57:15,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 21:57:15,928 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:15,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:15,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:15,945 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:57:15,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-12 21:57:15,946 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:15,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:15,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:15,964 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:57:15,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-06-12 21:57:15,966 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:15,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:15,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:15,981 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:57:15,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 21:57:15,982 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:15,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:15,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:15,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:16,000 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:16,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-06-12 21:57:16,001 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:16,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:16,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:16,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:16,013 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:57:16,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 20 [2021-06-12 21:57:16,015 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:16,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:16,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 21:57:16,090 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:729, output treesize:181 [2021-06-12 21:57:16,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:16,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921724512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:16,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:57:16,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 21:57:16,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661598219] [2021-06-12 21:57:16,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:57:16,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:57:16,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:57:16,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:57:16,298 INFO L87 Difference]: Start difference. First operand 1611 states and 5421 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:16,919 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-06-12 21:57:17,096 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-06-12 21:57:17,515 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-06-12 21:57:17,672 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2021-06-12 21:57:17,872 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 21:57:17,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:57:17,964 INFO L93 Difference]: Finished difference Result 2102 states and 6930 transitions. [2021-06-12 21:57:17,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:57:17,964 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:57:17,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:57:17,967 INFO L225 Difference]: With dead ends: 2102 [2021-06-12 21:57:17,967 INFO L226 Difference]: Without dead ends: 2083 [2021-06-12 21:57:17,967 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 2043.4ms TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:57:17,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2021-06-12 21:57:17,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 1612. [2021-06-12 21:57:17,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1611 states have (on average 3.3699565487274983) internal successors, (5429), 1611 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:17,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 5429 transitions. [2021-06-12 21:57:17,986 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 5429 transitions. Word has length 26 [2021-06-12 21:57:17,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:57:17,986 INFO L482 AbstractCegarLoop]: Abstraction has 1612 states and 5429 transitions. [2021-06-12 21:57:17,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:17,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 5429 transitions. [2021-06-12 21:57:17,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:57:17,988 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:57:17,989 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:57:18,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1163,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:18,202 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:57:18,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:57:18,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1506727430, now seen corresponding path program 26 times [2021-06-12 21:57:18,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:57:18,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469580087] [2021-06-12 21:57:18,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:57:18,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:57:18,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:18,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:57:18,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469580087] [2021-06-12 21:57:18,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469580087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:18,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067724646] [2021-06-12 21:57:18,611 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:18,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:57:18,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:57:18,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:57:18,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:57:18,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:18,831 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:57:18,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:57:18,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:18,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:18,841 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:57:18,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:57:18,842 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:18,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:18,850 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:57:18,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:57:18,850 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:18,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:18,862 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:57:18,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 21:57:18,864 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:18,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:18,874 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:18,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 21:57:18,875 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:18,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:18,886 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:57:18,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 21:57:18,887 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:18,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:18,895 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:57:18,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:57:18,896 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:18,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:18,906 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:18,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 21:57:18,907 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:18,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:18,915 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:57:18,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 21:57:18,916 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:18,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:18,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:18,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 21:57:18,929 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:18,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:18,937 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:57:18,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 21:57:18,938 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:18,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:18,948 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:18,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 21:57:18,950 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:18,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:18,960 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:57:18,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 21:57:18,962 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:18,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:18,972 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:18,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 21:57:18,976 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:18,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:18,983 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:57:18,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 21:57:18,984 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:18,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:18,989 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:57:18,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 21:57:18,990 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:19,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:19,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 21:57:19,061 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-06-12 21:57:19,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:19,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067724646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:19,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:57:19,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 21:57:19,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023553259] [2021-06-12 21:57:19,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:57:19,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:57:19,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:57:19,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:57:19,284 INFO L87 Difference]: Start difference. First operand 1612 states and 5429 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:19,850 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-06-12 21:57:20,506 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-06-12 21:57:20,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:57:20,562 INFO L93 Difference]: Finished difference Result 2116 states and 6975 transitions. [2021-06-12 21:57:20,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:57:20,562 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:57:20,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:57:20,565 INFO L225 Difference]: With dead ends: 2116 [2021-06-12 21:57:20,565 INFO L226 Difference]: Without dead ends: 2091 [2021-06-12 21:57:20,565 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1574.8ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:57:20,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-06-12 21:57:20,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1618. [2021-06-12 21:57:20,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 3.368583797155226) internal successors, (5447), 1617 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:20,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 5447 transitions. [2021-06-12 21:57:20,586 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 5447 transitions. Word has length 26 [2021-06-12 21:57:20,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:57:20,587 INFO L482 AbstractCegarLoop]: Abstraction has 1618 states and 5447 transitions. [2021-06-12 21:57:20,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:20,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 5447 transitions. [2021-06-12 21:57:20,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:57:20,589 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:57:20,589 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:57:20,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1188 [2021-06-12 21:57:20,806 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:57:20,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:57:20,806 INFO L82 PathProgramCache]: Analyzing trace with hash -132958662, now seen corresponding path program 42 times [2021-06-12 21:57:20,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:57:20,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480552950] [2021-06-12 21:57:20,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:57:20,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:57:21,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:21,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:57:21,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480552950] [2021-06-12 21:57:21,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480552950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:21,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237073387] [2021-06-12 21:57:21,457 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:21,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:57:21,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:57:21,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:57:21,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:57:22,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:22,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:22,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-12 21:57:22,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:22,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:22,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:22,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-06-12 21:57:22,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:22,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:22,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:22,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-06-12 21:57:22,107 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:22,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:22,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:22,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-12 21:57:22,118 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:22,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:22,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:22,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-06-12 21:57:22,129 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:22,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:22,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:22,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-12 21:57:22,139 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:22,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:22,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:22,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-06-12 21:57:22,150 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:22,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:22,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:22,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-12 21:57:22,161 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:22,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:22,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:22,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-06-12 21:57:22,173 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:22,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:22,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:22,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-06-12 21:57:22,183 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:22,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:22,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:22,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-12 21:57:22,194 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:22,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:22,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:22,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-12 21:57:22,204 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:22,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:22,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:22,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-06-12 21:57:22,214 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:22,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:22,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:22,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-12 21:57:22,224 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:22,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:22,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:22,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-06-12 21:57:22,232 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:22,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:22,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:22,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:22,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-06-12 21:57:22,237 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:22,268 INFO L628 ElimStorePlain]: treesize reduction 20, result has 64.9 percent of original size [2021-06-12 21:57:22,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:57:22,269 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:27 [2021-06-12 21:57:22,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:22,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237073387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:22,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:57:22,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-12 21:57:22,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512601686] [2021-06-12 21:57:22,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:57:22,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:57:22,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:57:22,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:57:22,298 INFO L87 Difference]: Start difference. First operand 1618 states and 5447 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:23,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:57:23,906 INFO L93 Difference]: Finished difference Result 2097 states and 6880 transitions. [2021-06-12 21:57:23,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 21:57:23,907 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:57:23,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:57:23,909 INFO L225 Difference]: With dead ends: 2097 [2021-06-12 21:57:23,909 INFO L226 Difference]: Without dead ends: 2071 [2021-06-12 21:57:23,909 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1973.7ms TimeCoverageRelationStatistics Valid=340, Invalid=1552, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 21:57:23,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-06-12 21:57:23,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1622. [2021-06-12 21:57:23,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 3.366440468846391) internal successors, (5457), 1621 states have internal predecessors, (5457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:23,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 5457 transitions. [2021-06-12 21:57:23,928 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 5457 transitions. Word has length 26 [2021-06-12 21:57:23,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:57:23,928 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 5457 transitions. [2021-06-12 21:57:23,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:23,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 5457 transitions. [2021-06-12 21:57:23,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:57:23,930 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:57:23,930 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:57:24,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1205 [2021-06-12 21:57:24,130 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:57:24,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:57:24,131 INFO L82 PathProgramCache]: Analyzing trace with hash 934915902, now seen corresponding path program 43 times [2021-06-12 21:57:24,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:57:24,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477758052] [2021-06-12 21:57:24,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:57:24,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:57:24,708 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2021-06-12 21:57:24,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:24,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:57:24,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477758052] [2021-06-12 21:57:24,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477758052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:24,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11134645] [2021-06-12 21:57:24,793 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:24,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:57:24,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:57:24,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:57:25,092 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-06-12 21:57:25,141 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_132, v_prenex_134], 6=[A, v_prenex_130]} [2021-06-12 21:57:25,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:25,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:25,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:25,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-12 21:57:25,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:25,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:25,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:25,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:57:25,155 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:25,266 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-06-12 21:57:25,266 INFO L628 ElimStorePlain]: treesize reduction 180, result has 40.2 percent of original size [2021-06-12 21:57:25,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:25,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-12 21:57:25,272 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:25,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:25,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:25,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:25,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:25,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:25,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 21:57:25,313 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:25,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:25,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:25,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:25,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 21:57:25,348 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:25,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:25,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 21:57:25,377 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:341, output treesize:43 [2021-06-12 21:57:25,425 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:25,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11134645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:25,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:57:25,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 21:57:25,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273861230] [2021-06-12 21:57:25,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:57:25,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:57:25,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:57:25,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:57:25,426 INFO L87 Difference]: Start difference. First operand 1622 states and 5457 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-06-12 21:57:27,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:57:27,273 INFO L93 Difference]: Finished difference Result 2270 states and 7447 transitions. [2021-06-12 21:57:27,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 21:57:27,273 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 26 [2021-06-12 21:57:27,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:57:27,276 INFO L225 Difference]: With dead ends: 2270 [2021-06-12 21:57:27,276 INFO L226 Difference]: Without dead ends: 2255 [2021-06-12 21:57:27,277 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 2205.4ms TimeCoverageRelationStatistics Valid=391, Invalid=1589, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 21:57:27,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2021-06-12 21:57:27,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 1622. [2021-06-12 21:57:27,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 3.366440468846391) internal successors, (5457), 1621 states have internal predecessors, (5457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:27,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 5457 transitions. [2021-06-12 21:57:27,298 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 5457 transitions. Word has length 26 [2021-06-12 21:57:27,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:57:27,299 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 5457 transitions. [2021-06-12 21:57:27,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-06-12 21:57:27,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 5457 transitions. [2021-06-12 21:57:27,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:57:27,301 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:57:27,301 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:57:27,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1319,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:27,501 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:57:27,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:57:27,501 INFO L82 PathProgramCache]: Analyzing trace with hash 346540478, now seen corresponding path program 27 times [2021-06-12 21:57:27,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:57:27,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840450820] [2021-06-12 21:57:27,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:57:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:57:27,741 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2021-06-12 21:57:28,066 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-06-12 21:57:28,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:28,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:57:28,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840450820] [2021-06-12 21:57:28,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840450820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:28,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670342493] [2021-06-12 21:57:28,179 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:28,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:57:28,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:57:28,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:57:28,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:57:28,477 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-06-12 21:57:28,653 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-12 21:57:28,957 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 56 [2021-06-12 21:57:29,022 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_143, v_prenex_145], 6=[A, v_prenex_147]} [2021-06-12 21:57:29,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:29,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:29,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:29,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:57:29,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:29,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:29,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:29,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:57:29,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:29,251 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-06-12 21:57:29,252 INFO L628 ElimStorePlain]: treesize reduction 147, result has 51.5 percent of original size [2021-06-12 21:57:29,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:29,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:29,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:29,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:57:29,259 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:29,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:29,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:29,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:57:29,264 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:29,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:29,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:29,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:57:29,318 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:29,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:29,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:29,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 21:57:29,370 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:29,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:29,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 21:57:29,416 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:341, output treesize:61 [2021-06-12 21:57:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:29,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670342493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:29,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:57:29,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 21:57:29,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476639768] [2021-06-12 21:57:29,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:57:29,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:57:29,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:57:29,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:57:29,481 INFO L87 Difference]: Start difference. First operand 1622 states and 5457 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 21:57:29,906 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-06-12 21:57:30,221 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-06-12 21:57:30,393 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 47 [2021-06-12 21:57:30,849 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 69 [2021-06-12 21:57:31,433 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 77 [2021-06-12 21:57:31,949 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 89 [2021-06-12 21:57:32,589 WARN L205 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 87 [2021-06-12 21:57:32,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:57:32,717 INFO L93 Difference]: Finished difference Result 2122 states and 6912 transitions. [2021-06-12 21:57:32,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 21:57:32,717 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-06-12 21:57:32,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:57:32,720 INFO L225 Difference]: With dead ends: 2122 [2021-06-12 21:57:32,720 INFO L226 Difference]: Without dead ends: 2107 [2021-06-12 21:57:32,720 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 3901.5ms TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:57:32,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2021-06-12 21:57:32,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 1633. [2021-06-12 21:57:32,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1633 states, 1632 states have (on average 3.3670343137254903) internal successors, (5495), 1632 states have internal predecessors, (5495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:32,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1633 states to 1633 states and 5495 transitions. [2021-06-12 21:57:32,748 INFO L78 Accepts]: Start accepts. Automaton has 1633 states and 5495 transitions. Word has length 26 [2021-06-12 21:57:32,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:57:32,748 INFO L482 AbstractCegarLoop]: Abstraction has 1633 states and 5495 transitions. [2021-06-12 21:57:32,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 21:57:32,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1633 states and 5495 transitions. [2021-06-12 21:57:32,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:57:32,750 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:57:32,750 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:57:32,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1333 [2021-06-12 21:57:32,950 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:57:32,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:57:32,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1896922042, now seen corresponding path program 44 times [2021-06-12 21:57:32,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:57:32,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711744701] [2021-06-12 21:57:32,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:57:32,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:57:33,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:33,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:57:33,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711744701] [2021-06-12 21:57:33,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711744701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:33,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327917165] [2021-06-12 21:57:33,499 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:33,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:57:33,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:57:33,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 21:57:33,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:57:33,884 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-06-12 21:57:34,217 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_158], 6=[v_prenex_160, v_prenex_162]} [2021-06-12 21:57:34,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:34,241 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-12 21:57:34,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-06-12 21:57:34,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:34,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:34,266 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-12 21:57:34,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-06-12 21:57:34,267 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:34,442 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-12 21:57:34,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:34,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:34,463 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-12 21:57:34,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 23 [2021-06-12 21:57:34,464 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:34,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:34,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:34,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2021-06-12 21:57:34,484 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:34,652 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-12 21:57:34,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:34,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:34,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:34,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:34,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:34,674 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:34,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-06-12 21:57:34,679 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:34,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:34,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:34,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:34,699 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-12 21:57:34,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-06-12 21:57:34,700 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:34,849 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-12 21:57:34,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:34,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:34,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:34,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:34,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:34,874 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-12 21:57:34,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-06-12 21:57:34,876 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:34,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:34,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:34,895 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-12 21:57:34,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-06-12 21:57:34,898 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:35,028 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-06-12 21:57:35,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:35,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 21:57:35,046 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:433, output treesize:343 [2021-06-12 21:57:35,168 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-06-12 21:57:35,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:35,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327917165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:35,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:57:35,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 21:57:35,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119812903] [2021-06-12 21:57:35,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:57:35,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:57:35,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:57:35,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:57:35,231 INFO L87 Difference]: Start difference. First operand 1633 states and 5495 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:37,485 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2021-06-12 21:57:38,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:57:38,076 INFO L93 Difference]: Finished difference Result 2550 states and 8113 transitions. [2021-06-12 21:57:38,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 21:57:38,076 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:57:38,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:57:38,079 INFO L225 Difference]: With dead ends: 2550 [2021-06-12 21:57:38,079 INFO L226 Difference]: Without dead ends: 2506 [2021-06-12 21:57:38,079 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 3229.6ms TimeCoverageRelationStatistics Valid=511, Invalid=2459, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 21:57:38,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2506 states. [2021-06-12 21:57:38,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2506 to 1640. [2021-06-12 21:57:38,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 3.36790726052471) internal successors, (5520), 1639 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:38,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 5520 transitions. [2021-06-12 21:57:38,101 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 5520 transitions. Word has length 26 [2021-06-12 21:57:38,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:57:38,101 INFO L482 AbstractCegarLoop]: Abstraction has 1640 states and 5520 transitions. [2021-06-12 21:57:38,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:38,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 5520 transitions. [2021-06-12 21:57:38,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:57:38,103 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:57:38,103 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:57:38,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1349,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:38,305 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:57:38,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:57:38,305 INFO L82 PathProgramCache]: Analyzing trace with hash 920603198, now seen corresponding path program 45 times [2021-06-12 21:57:38,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:57:38,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429276728] [2021-06-12 21:57:38,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:57:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:57:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:38,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:57:38,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429276728] [2021-06-12 21:57:38,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429276728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:38,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146938598] [2021-06-12 21:57:38,795 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:38,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:57:38,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:57:38,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 21:57:38,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:57:39,133 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-06-12 21:57:39,333 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-12 21:57:39,658 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-12 21:57:40,054 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-12 21:57:40,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2021-06-12 21:57:40,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:40,112 INFO L354 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2021-06-12 21:57:40,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 38 [2021-06-12 21:57:40,113 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:41,202 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 175 DAG size of output: 169 [2021-06-12 21:57:41,203 INFO L628 ElimStorePlain]: treesize reduction 23, result has 97.5 percent of original size [2021-06-12 21:57:41,271 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-06-12 21:57:41,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 51 [2021-06-12 21:57:41,274 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:41,326 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-06-12 21:57:41,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2021-06-12 21:57:41,330 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:41,865 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-06-12 21:57:41,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:41,918 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:41,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 67 [2021-06-12 21:57:41,942 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:41,995 INFO L354 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2021-06-12 21:57:41,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2021-06-12 21:57:42,001 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:43,639 WARN L205 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 185 DAG size of output: 168 [2021-06-12 21:57:43,640 INFO L628 ElimStorePlain]: treesize reduction 92, result has 90.6 percent of original size [2021-06-12 21:57:43,709 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-12 21:57:43,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 59 [2021-06-12 21:57:43,720 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:43,786 INFO L354 Elim1Store]: treesize reduction 4, result has 91.8 percent of original size [2021-06-12 21:57:43,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 63 [2021-06-12 21:57:43,800 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:44,875 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 181 DAG size of output: 172 [2021-06-12 21:57:44,876 INFO L628 ElimStorePlain]: treesize reduction 83, result has 91.5 percent of original size [2021-06-12 21:57:44,938 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-06-12 21:57:44,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 52 [2021-06-12 21:57:44,946 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:44,985 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:44,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 61 [2021-06-12 21:57:45,017 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:45,515 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2021-06-12 21:57:45,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:45,582 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-12 21:57:45,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2021-06-12 21:57:45,591 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:45,657 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-12 21:57:45,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 56 [2021-06-12 21:57:45,676 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:46,645 WARN L205 SmtUtils]: Spent 969.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 152 [2021-06-12 21:57:46,646 INFO L628 ElimStorePlain]: treesize reduction 37, result has 95.8 percent of original size [2021-06-12 21:57:46,706 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-06-12 21:57:46,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 52 [2021-06-12 21:57:46,715 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:46,766 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-06-12 21:57:46,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 51 [2021-06-12 21:57:46,769 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:47,240 WARN L205 SmtUtils]: Spent 470.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-06-12 21:57:47,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:47,303 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-06-12 21:57:47,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2021-06-12 21:57:47,307 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:47,361 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-12 21:57:47,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 56 [2021-06-12 21:57:47,381 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:48,221 WARN L205 SmtUtils]: Spent 839.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 136 [2021-06-12 21:57:48,221 INFO L628 ElimStorePlain]: treesize reduction 68, result has 91.9 percent of original size [2021-06-12 21:57:48,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-06-12 21:57:48,353 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 17 variables, input treesize:913, output treesize:2294 [2021-06-12 21:57:49,043 WARN L205 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 69 [2021-06-12 21:57:49,212 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-06-12 21:57:49,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:49,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146938598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:49,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:57:49,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 21:57:49,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889936854] [2021-06-12 21:57:49,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:57:49,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:57:49,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:57:49,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:57:49,242 INFO L87 Difference]: Start difference. First operand 1640 states and 5520 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:51,824 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-06-12 21:57:52,228 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-06-12 21:57:52,952 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 89 [2021-06-12 21:57:53,366 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2021-06-12 21:57:53,742 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-06-12 21:57:53,911 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 33 [2021-06-12 21:57:54,544 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 90 [2021-06-12 21:57:55,058 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 92 [2021-06-12 21:57:56,016 WARN L205 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 96 [2021-06-12 21:57:56,414 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-06-12 21:57:56,657 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 47 [2021-06-12 21:57:56,814 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 30 [2021-06-12 21:57:56,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:57:56,954 INFO L93 Difference]: Finished difference Result 3086 states and 9767 transitions. [2021-06-12 21:57:56,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 21:57:56,954 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:57:56,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:57:56,958 INFO L225 Difference]: With dead ends: 3086 [2021-06-12 21:57:56,958 INFO L226 Difference]: Without dead ends: 3056 [2021-06-12 21:57:56,959 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 8160.5ms TimeCoverageRelationStatistics Valid=696, Invalid=4134, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 21:57:56,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2021-06-12 21:57:56,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 1671. [2021-06-12 21:57:56,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1671 states, 1670 states have (on average 3.3748502994011975) internal successors, (5636), 1670 states have internal predecessors, (5636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:56,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 5636 transitions. [2021-06-12 21:57:56,987 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 5636 transitions. Word has length 26 [2021-06-12 21:57:56,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:57:56,987 INFO L482 AbstractCegarLoop]: Abstraction has 1671 states and 5636 transitions. [2021-06-12 21:57:56,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:57:56,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 5636 transitions. [2021-06-12 21:57:56,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:57:56,990 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:57:56,990 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:57:57,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1419,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:57,205 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:57:57,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:57:57,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1936410854, now seen corresponding path program 28 times [2021-06-12 21:57:57,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:57:57,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45782975] [2021-06-12 21:57:57,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:57:57,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:57:57,419 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-06-12 21:57:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:57,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:57:57,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45782975] [2021-06-12 21:57:57,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45782975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:57,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601261273] [2021-06-12 21:57:57,817 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:57:57,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:57:57,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:57:57,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 21:57:57,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:57:58,150 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-12 21:57:58,401 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-06-12 21:57:58,471 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_185], 2=[v_prenex_186, v_prenex_187], 3=[A]} [2021-06-12 21:57:58,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:58,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:57:58,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:58,612 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-06-12 21:57:58,612 INFO L628 ElimStorePlain]: treesize reduction 94, result has 60.3 percent of original size [2021-06-12 21:57:58,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:58,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:58,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:58,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:57:58,619 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:58,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:58,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:58,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:57:58,624 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:58,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:58,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:58,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:57:58,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:57:58,672 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:58,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:58,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:57:58,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 21:57:58,716 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:57:58,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:57:58,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 21:57:58,754 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:251, output treesize:56 [2021-06-12 21:57:58,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:57:58,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601261273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:57:58,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:57:58,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 21:57:58,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948714886] [2021-06-12 21:57:58,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:57:58,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:57:58,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:57:58,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:57:58,810 INFO L87 Difference]: Start difference. First operand 1671 states and 5636 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 21:57:59,184 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-06-12 21:57:59,429 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-06-12 21:58:00,245 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-06-12 21:58:00,382 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-12 21:58:00,610 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2021-06-12 21:58:00,853 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 62 [2021-06-12 21:58:01,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:58:01,015 INFO L93 Difference]: Finished difference Result 2244 states and 7296 transitions. [2021-06-12 21:58:01,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 21:58:01,016 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-06-12 21:58:01,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:58:01,019 INFO L225 Difference]: With dead ends: 2244 [2021-06-12 21:58:01,019 INFO L226 Difference]: Without dead ends: 2229 [2021-06-12 21:58:01,019 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 2666.6ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:58:01,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2229 states. [2021-06-12 21:58:01,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2229 to 1676. [2021-06-12 21:58:01,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.3761194029850747) internal successors, (5655), 1675 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:58:01,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5655 transitions. [2021-06-12 21:58:01,040 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5655 transitions. Word has length 26 [2021-06-12 21:58:01,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:58:01,040 INFO L482 AbstractCegarLoop]: Abstraction has 1676 states and 5655 transitions. [2021-06-12 21:58:01,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 21:58:01,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5655 transitions. [2021-06-12 21:58:01,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:58:01,042 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:58:01,042 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:58:01,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1636,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:58:01,243 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:58:01,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:58:01,243 INFO L82 PathProgramCache]: Analyzing trace with hash 318878074, now seen corresponding path program 29 times [2021-06-12 21:58:01,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:58:01,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068715136] [2021-06-12 21:58:01,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:58:01,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:58:01,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:58:01,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:58:01,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068715136] [2021-06-12 21:58:01,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068715136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:58:01,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103506741] [2021-06-12 21:58:01,618 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:58:01,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:58:01,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:58:01,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 21:58:01,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:58:02,030 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-12 21:58:02,233 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-12 21:58:02,283 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_195, v_prenex_197, v_prenex_199, v_prenex_200, v_prenex_201], 3=[v_prenex_196, v_prenex_198]} [2021-06-12 21:58:02,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:02,297 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:58:02,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 21:58:02,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:02,414 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-12 21:58:02,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:02,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:02,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:02,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 21:58:02,428 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:02,546 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-12 21:58:02,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:02,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:02,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:02,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 21:58:02,560 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:02,676 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-12 21:58:02,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:02,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:02,688 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:02,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 21:58:02,692 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:02,800 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-12 21:58:02,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:02,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:02,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:02,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 21:58:02,814 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:02,916 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-12 21:58:02,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:02,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:02,927 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:58:02,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 21:58:02,929 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:03,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:03,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:03,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:03,039 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-12 21:58:03,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-06-12 21:58:03,041 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:03,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:03,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:03,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:03,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:03,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-06-12 21:58:03,147 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:03,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:03,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 21:58:03,242 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:317, output treesize:184 [2021-06-12 21:58:03,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:58:03,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103506741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:58:03,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:58:03,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 21:58:03,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31192415] [2021-06-12 21:58:03,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:58:03,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:58:03,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:58:03,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:58:03,456 INFO L87 Difference]: Start difference. First operand 1676 states and 5655 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:58:03,813 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-06-12 21:58:04,861 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-06-12 21:58:05,397 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 72 [2021-06-12 21:58:05,811 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 106 [2021-06-12 21:58:06,251 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2021-06-12 21:58:06,753 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 110 [2021-06-12 21:58:07,253 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2021-06-12 21:58:07,501 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-06-12 21:58:07,841 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2021-06-12 21:58:08,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:58:08,008 INFO L93 Difference]: Finished difference Result 2686 states and 8637 transitions. [2021-06-12 21:58:08,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 21:58:08,008 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:58:08,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:58:08,012 INFO L225 Difference]: With dead ends: 2686 [2021-06-12 21:58:08,012 INFO L226 Difference]: Without dead ends: 2652 [2021-06-12 21:58:08,012 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 4550.2ms TimeCoverageRelationStatistics Valid=371, Invalid=1435, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 21:58:08,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2021-06-12 21:58:08,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 1683. [2021-06-12 21:58:08,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.381688466111772) internal successors, (5688), 1682 states have internal predecessors, (5688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:58:08,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5688 transitions. [2021-06-12 21:58:08,038 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5688 transitions. Word has length 26 [2021-06-12 21:58:08,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:58:08,038 INFO L482 AbstractCegarLoop]: Abstraction has 1683 states and 5688 transitions. [2021-06-12 21:58:08,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:58:08,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5688 transitions. [2021-06-12 21:58:08,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:58:08,040 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:58:08,040 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:58:08,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1647 [2021-06-12 21:58:08,240 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:58:08,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:58:08,241 INFO L82 PathProgramCache]: Analyzing trace with hash 2122915566, now seen corresponding path program 46 times [2021-06-12 21:58:08,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:58:08,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369992320] [2021-06-12 21:58:08,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:58:08,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:58:08,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:58:08,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:58:08,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369992320] [2021-06-12 21:58:08,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369992320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:58:08,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130481158] [2021-06-12 21:58:08,647 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:58:08,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:58:08,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:58:08,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 21:58:08,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:58:09,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:09,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:09,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-06-12 21:58:09,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:09,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:09,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:09,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-06-12 21:58:09,285 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:09,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:09,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:09,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 21:58:09,293 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:09,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:09,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:09,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-12 21:58:09,302 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:09,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:09,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:09,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-06-12 21:58:09,312 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:09,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:09,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:09,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-06-12 21:58:09,321 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:09,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:09,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:09,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-12 21:58:09,330 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:09,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:09,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:09,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-12 21:58:09,339 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:09,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:09,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:09,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-12 21:58:09,349 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:09,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:09,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:09,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:58:09,358 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:09,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:09,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:09,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-12 21:58:09,367 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:09,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:09,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:09,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-12 21:58:09,376 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:09,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:09,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:09,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 19 [2021-06-12 21:58:09,393 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:09,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:09,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:09,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-06-12 21:58:09,429 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:09,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:09,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:09,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-06-12 21:58:09,440 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:09,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:09,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:09,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:09,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-12 21:58:09,447 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:09,510 INFO L628 ElimStorePlain]: treesize reduction 216, result has 14.6 percent of original size [2021-06-12 21:58:09,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:58:09,511 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:31 [2021-06-12 21:58:09,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:58:09,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130481158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:58:09,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:58:09,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-12 21:58:09,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475705111] [2021-06-12 21:58:09,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:58:09,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:58:09,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:58:09,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:58:09,553 INFO L87 Difference]: Start difference. First operand 1683 states and 5688 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-06-12 21:58:10,253 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2021-06-12 21:58:10,939 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-06-12 21:58:11,578 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-06-12 21:58:12,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:58:12,272 INFO L93 Difference]: Finished difference Result 3384 states and 10825 transitions. [2021-06-12 21:58:12,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 21:58:12,272 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 26 [2021-06-12 21:58:12,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:58:12,277 INFO L225 Difference]: With dead ends: 3384 [2021-06-12 21:58:12,277 INFO L226 Difference]: Without dead ends: 3348 [2021-06-12 21:58:12,277 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 2803.4ms TimeCoverageRelationStatistics Valid=538, Invalid=2432, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 21:58:12,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3348 states. [2021-06-12 21:58:12,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3348 to 1796. [2021-06-12 21:58:12,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1795 states have (on average 3.403899721448468) internal successors, (6110), 1795 states have internal predecessors, (6110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:58:12,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 6110 transitions. [2021-06-12 21:58:12,307 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 6110 transitions. Word has length 26 [2021-06-12 21:58:12,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:58:12,307 INFO L482 AbstractCegarLoop]: Abstraction has 1796 states and 6110 transitions. [2021-06-12 21:58:12,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-06-12 21:58:12,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 6110 transitions. [2021-06-12 21:58:12,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:58:12,309 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:58:12,309 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:58:12,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1664,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:58:12,510 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:58:12,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:58:12,510 INFO L82 PathProgramCache]: Analyzing trace with hash -338403078, now seen corresponding path program 47 times [2021-06-12 21:58:12,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:58:12,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555123788] [2021-06-12 21:58:12,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:58:12,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:58:12,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:58:12,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:58:12,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555123788] [2021-06-12 21:58:12,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555123788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:58:12,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546472342] [2021-06-12 21:58:12,969 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:58:13,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:58:13,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:58:13,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 21:58:13,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:58:13,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,494 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-06-12 21:58:13,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 37 [2021-06-12 21:58:13,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:13,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,529 INFO L354 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2021-06-12 21:58:13,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 47 [2021-06-12 21:58:13,533 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:13,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,558 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-06-12 21:58:13,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-06-12 21:58:13,561 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:13,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,587 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-06-12 21:58:13,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-06-12 21:58:13,589 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:13,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,606 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:58:13,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-06-12 21:58:13,607 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:13,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,632 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-06-12 21:58:13,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 28 [2021-06-12 21:58:13,633 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:13,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,659 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-06-12 21:58:13,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 28 [2021-06-12 21:58:13,660 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:13,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,678 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:58:13,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-12 21:58:13,679 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:13,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,696 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:58:13,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-12 21:58:13,697 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:13,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,714 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:58:13,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-12 21:58:13,715 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:13,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,740 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-06-12 21:58:13,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 25 [2021-06-12 21:58:13,741 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:13,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,757 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:58:13,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 1 [2021-06-12 21:58:13,758 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:13,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,775 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:58:13,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-06-12 21:58:13,776 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:13,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,791 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:58:13,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-12 21:58:13,792 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:13,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,814 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:13,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 45 [2021-06-12 21:58:13,820 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:13,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:13,830 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:58:13,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-12 21:58:13,831 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:13,993 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-06-12 21:58:13,993 INFO L628 ElimStorePlain]: treesize reduction 116, result has 51.7 percent of original size [2021-06-12 21:58:13,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 21:58:13,995 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:133 [2021-06-12 21:58:14,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:58:14,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546472342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:58:14,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:58:14,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-12 21:58:14,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191791052] [2021-06-12 21:58:14,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:58:14,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:58:14,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:58:14,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:58:14,142 INFO L87 Difference]: Start difference. First operand 1796 states and 6110 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-06-12 21:58:15,414 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 47 [2021-06-12 21:58:15,912 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-06-12 21:58:16,145 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-06-12 21:58:16,358 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-06-12 21:58:16,838 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-06-12 21:58:17,094 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-06-12 21:58:17,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:58:17,350 INFO L93 Difference]: Finished difference Result 3832 states and 12118 transitions. [2021-06-12 21:58:17,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 21:58:17,351 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 26 [2021-06-12 21:58:17,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:58:17,356 INFO L225 Difference]: With dead ends: 3832 [2021-06-12 21:58:17,356 INFO L226 Difference]: Without dead ends: 3775 [2021-06-12 21:58:17,356 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 3308.4ms TimeCoverageRelationStatistics Valid=649, Invalid=2657, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 21:58:17,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3775 states. [2021-06-12 21:58:17,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3775 to 1819. [2021-06-12 21:58:17,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1818 states have (on average 3.407590759075908) internal successors, (6195), 1818 states have internal predecessors, (6195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:58:17,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 6195 transitions. [2021-06-12 21:58:17,390 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 6195 transitions. Word has length 26 [2021-06-12 21:58:17,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:58:17,390 INFO L482 AbstractCegarLoop]: Abstraction has 1819 states and 6195 transitions. [2021-06-12 21:58:17,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-06-12 21:58:17,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 6195 transitions. [2021-06-12 21:58:17,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:58:17,392 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:58:17,392 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:58:17,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1770 [2021-06-12 21:58:17,593 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:58:17,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:58:17,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1512099618, now seen corresponding path program 30 times [2021-06-12 21:58:17,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:58:17,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131043395] [2021-06-12 21:58:17,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:58:17,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:58:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:58:18,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:58:18,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131043395] [2021-06-12 21:58:18,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131043395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:58:18,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500972563] [2021-06-12 21:58:18,105 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:58:18,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:58:18,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:58:18,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:58:18,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:58:18,571 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-12 21:58:19,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:19,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:19,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 21:58:19,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:19,222 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-06-12 21:58:19,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:19,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:19,245 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 21:58:19,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 21:58:19,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:19,391 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-06-12 21:58:19,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:19,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:19,416 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 21:58:19,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-12 21:58:19,419 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:19,574 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-06-12 21:58:19,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:19,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:19,598 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 21:58:19,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-12 21:58:19,601 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:19,740 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-06-12 21:58:19,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:19,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:19,763 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 21:58:19,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-12 21:58:19,765 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:19,902 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-12 21:58:19,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:19,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:19,921 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 21:58:19,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 21:58:19,923 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:20,058 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-06-12 21:58:20,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:20,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:20,076 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:20,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 21:58:20,078 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:20,214 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-06-12 21:58:20,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:20,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:20,232 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:20,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-12 21:58:20,236 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:20,368 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-12 21:58:20,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:20,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 21:58:20,389 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:373, output treesize:497 [2021-06-12 21:58:20,702 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-06-12 21:58:20,957 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-06-12 21:58:21,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:58:21,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500972563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:58:21,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:58:21,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 21:58:21,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199355413] [2021-06-12 21:58:21,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:58:21,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:58:21,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:58:21,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:58:21,064 INFO L87 Difference]: Start difference. First operand 1819 states and 6195 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:58:21,301 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 28 [2021-06-12 21:58:22,069 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-06-12 21:58:22,257 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 49 [2021-06-12 21:58:22,589 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2021-06-12 21:58:22,904 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-06-12 21:58:23,475 WARN L205 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 86 [2021-06-12 21:58:23,965 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2021-06-12 21:58:24,352 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 60 [2021-06-12 21:58:24,624 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2021-06-12 21:58:25,178 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 83 [2021-06-12 21:58:25,400 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-12 21:58:25,643 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-06-12 21:58:26,138 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 74 [2021-06-12 21:58:26,769 WARN L205 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 120 [2021-06-12 21:58:27,221 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 133 [2021-06-12 21:58:28,100 WARN L205 SmtUtils]: Spent 671.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 140 [2021-06-12 21:58:28,482 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 99 [2021-06-12 21:58:28,894 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2021-06-12 21:58:29,272 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 44 [2021-06-12 21:58:29,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:58:29,337 INFO L93 Difference]: Finished difference Result 2671 states and 8693 transitions. [2021-06-12 21:58:29,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 21:58:29,337 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:58:29,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:58:29,341 INFO L225 Difference]: With dead ends: 2671 [2021-06-12 21:58:29,341 INFO L226 Difference]: Without dead ends: 2637 [2021-06-12 21:58:29,341 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 8793.8ms TimeCoverageRelationStatistics Valid=388, Invalid=2162, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 21:58:29,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2021-06-12 21:58:29,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 1837. [2021-06-12 21:58:29,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 3.411764705882353) internal successors, (6264), 1836 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:58:29,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 6264 transitions. [2021-06-12 21:58:29,366 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 6264 transitions. Word has length 26 [2021-06-12 21:58:29,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:58:29,366 INFO L482 AbstractCegarLoop]: Abstraction has 1837 states and 6264 transitions. [2021-06-12 21:58:29,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:58:29,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 6264 transitions. [2021-06-12 21:58:29,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:58:29,368 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:58:29,368 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:58:29,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1885 [2021-06-12 21:58:29,569 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:58:29,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:58:29,569 INFO L82 PathProgramCache]: Analyzing trace with hash 461518918, now seen corresponding path program 31 times [2021-06-12 21:58:29,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:58:29,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961486554] [2021-06-12 21:58:29,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:58:29,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:58:29,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:58:29,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:58:29,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961486554] [2021-06-12 21:58:29,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961486554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:58:29,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131178985] [2021-06-12 21:58:29,956 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:58:29,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:58:29,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:58:29,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:58:30,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:30,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:30,188 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:30,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 21:58:30,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:30,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:30,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:30,198 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:58:30,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-12 21:58:30,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:30,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:30,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:30,212 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:30,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-06-12 21:58:30,216 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:30,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:30,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:30,228 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:58:30,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-06-12 21:58:30,229 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:30,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:30,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:30,242 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:58:30,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-06-12 21:58:30,243 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:30,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:30,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:30,253 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:58:30,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-06-12 21:58:30,254 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:30,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:30,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:30,264 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:58:30,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-06-12 21:58:30,264 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:30,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:30,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:30,274 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:58:30,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 30 [2021-06-12 21:58:30,275 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:30,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:30,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:30,283 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:58:30,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-06-12 21:58:30,284 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:30,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:30,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:30,294 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:58:30,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-06-12 21:58:30,295 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:30,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:30,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:30,304 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:58:30,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 25 [2021-06-12 21:58:30,305 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:30,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:30,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:30,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:30,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-06-12 21:58:30,319 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:30,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:30,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:30,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:30,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2021-06-12 21:58:30,333 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:30,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:30,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:30,345 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:58:30,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 24 [2021-06-12 21:58:30,346 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:30,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:30,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:30,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:30,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-06-12 21:58:30,359 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:30,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:30,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:30,366 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:58:30,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-06-12 21:58:30,366 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:30,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:30,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 21:58:30,443 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:865, output treesize:221 [2021-06-12 21:58:30,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:58:30,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131178985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:58:30,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:58:30,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 21:58:30,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689924953] [2021-06-12 21:58:30,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:58:30,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:58:30,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:58:30,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:58:30,648 INFO L87 Difference]: Start difference. First operand 1837 states and 6264 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:58:31,495 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-06-12 21:58:32,348 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-06-12 21:58:32,709 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-06-12 21:58:32,968 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 43 [2021-06-12 21:58:33,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:58:33,136 INFO L93 Difference]: Finished difference Result 2618 states and 8665 transitions. [2021-06-12 21:58:33,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 21:58:33,136 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:58:33,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:58:33,140 INFO L225 Difference]: With dead ends: 2618 [2021-06-12 21:58:33,140 INFO L226 Difference]: Without dead ends: 2584 [2021-06-12 21:58:33,140 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 2510.0ms TimeCoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 21:58:33,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2021-06-12 21:58:33,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 1832. [2021-06-12 21:58:33,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1831 states have (on average 3.409612233752048) internal successors, (6243), 1831 states have internal predecessors, (6243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:58:33,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 6243 transitions. [2021-06-12 21:58:33,165 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 6243 transitions. Word has length 26 [2021-06-12 21:58:33,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:58:33,165 INFO L482 AbstractCegarLoop]: Abstraction has 1832 states and 6243 transitions. [2021-06-12 21:58:33,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:58:33,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 6243 transitions. [2021-06-12 21:58:33,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:58:33,167 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:58:33,167 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:58:33,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1945,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:58:33,368 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:58:33,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:58:33,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1795376066, now seen corresponding path program 32 times [2021-06-12 21:58:33,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:58:33,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971029645] [2021-06-12 21:58:33,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:58:33,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:58:33,584 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-06-12 21:58:33,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:58:33,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:58:33,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971029645] [2021-06-12 21:58:33,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971029645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:58:33,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831387643] [2021-06-12 21:58:33,835 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:58:33,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:58:33,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:58:33,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:58:33,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:58:34,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:34,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-12 21:58:34,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:34,289 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 21:58:34,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-12 21:58:34,297 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:34,430 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-12 21:58:34,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:34,447 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:34,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 21:58:34,448 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:34,462 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:34,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 21:58:34,467 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:34,606 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-12 21:58:34,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:34,624 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 21:58:34,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 21:58:34,626 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:34,643 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 21:58:34,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-12 21:58:34,647 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:34,773 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-12 21:58:34,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:34,793 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 21:58:34,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-12 21:58:34,794 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:34,808 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 21:58:34,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 21:58:34,810 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:34,931 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-06-12 21:58:34,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:34,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 21:58:34,965 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:349, output treesize:430 [2021-06-12 21:58:35,221 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-06-12 21:58:35,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:58:35,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831387643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:58:35,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:58:35,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 21:58:35,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822975365] [2021-06-12 21:58:35,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:58:35,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:58:35,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:58:35,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:58:35,484 INFO L87 Difference]: Start difference. First operand 1832 states and 6243 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:58:35,661 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 27 [2021-06-12 21:58:36,145 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-06-12 21:58:36,287 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 47 [2021-06-12 21:58:36,502 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-06-12 21:58:37,127 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-06-12 21:58:37,499 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2021-06-12 21:58:37,782 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44 [2021-06-12 21:58:38,147 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-06-12 21:58:38,537 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2021-06-12 21:58:38,822 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-06-12 21:58:39,122 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2021-06-12 21:58:39,462 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-06-12 21:58:39,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:58:39,809 INFO L93 Difference]: Finished difference Result 2647 states and 8625 transitions. [2021-06-12 21:58:39,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 21:58:39,809 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:58:39,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:58:39,813 INFO L225 Difference]: With dead ends: 2647 [2021-06-12 21:58:39,813 INFO L226 Difference]: Without dead ends: 2578 [2021-06-12 21:58:39,813 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 4589.1ms TimeCoverageRelationStatistics Valid=344, Invalid=1818, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 21:58:39,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2021-06-12 21:58:39,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1826. [2021-06-12 21:58:39,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1826 states, 1825 states have (on average 3.4076712328767123) internal successors, (6219), 1825 states have internal predecessors, (6219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:58:39,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 6219 transitions. [2021-06-12 21:58:39,836 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 6219 transitions. Word has length 26 [2021-06-12 21:58:39,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:58:39,836 INFO L482 AbstractCegarLoop]: Abstraction has 1826 states and 6219 transitions. [2021-06-12 21:58:39,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:58:39,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 6219 transitions. [2021-06-12 21:58:39,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:58:39,838 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:58:39,838 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:58:40,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1963,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:58:40,040 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:58:40,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:58:40,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1102392532, now seen corresponding path program 48 times [2021-06-12 21:58:40,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:58:40,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950332399] [2021-06-12 21:58:40,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:58:40,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:58:40,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:58:40,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:58:40,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950332399] [2021-06-12 21:58:40,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950332399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:58:40,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257870163] [2021-06-12 21:58:40,627 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:58:40,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:58:40,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:58:40,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:58:40,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:58:41,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:41,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 21:58:41,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:41,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:41,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 21:58:41,109 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:41,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:41,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-12 21:58:41,116 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:41,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:41,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 21:58:41,123 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:41,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:41,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-12 21:58:41,131 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:41,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:41,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 21:58:41,138 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:41,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:41,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 21:58:41,145 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:41,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:41,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-12 21:58:41,152 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:41,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:41,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-12 21:58:41,159 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:41,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:41,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-06-12 21:58:41,167 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:41,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:41,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-12 21:58:41,175 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:41,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:41,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-12 21:58:41,182 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:41,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:41,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 21:58:41,188 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:41,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:41,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-12 21:58:41,196 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:41,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:41,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-12 21:58:41,202 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:41,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:41,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:41,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-12 21:58:41,207 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:41,238 INFO L628 ElimStorePlain]: treesize reduction 34, result has 49.3 percent of original size [2021-06-12 21:58:41,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:58:41,239 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:21 [2021-06-12 21:58:41,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:58:41,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257870163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:58:41,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:58:41,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 21:58:41,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271836444] [2021-06-12 21:58:41,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:58:41,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:58:41,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:58:41,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:58:41,269 INFO L87 Difference]: Start difference. First operand 1826 states and 6219 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-06-12 21:58:41,806 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2021-06-12 21:58:42,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:58:42,895 INFO L93 Difference]: Finished difference Result 2336 states and 7723 transitions. [2021-06-12 21:58:42,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 21:58:42,896 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 26 [2021-06-12 21:58:42,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:58:42,899 INFO L225 Difference]: With dead ends: 2336 [2021-06-12 21:58:42,899 INFO L226 Difference]: Without dead ends: 2314 [2021-06-12 21:58:42,899 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1872.9ms TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 21:58:42,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-06-12 21:58:42,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1818. [2021-06-12 21:58:42,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.4072647220693453) internal successors, (6191), 1817 states have internal predecessors, (6191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:58:42,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6191 transitions. [2021-06-12 21:58:42,920 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6191 transitions. Word has length 26 [2021-06-12 21:58:42,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:58:42,920 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 6191 transitions. [2021-06-12 21:58:42,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-06-12 21:58:42,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6191 transitions. [2021-06-12 21:58:42,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:58:42,922 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:58:42,922 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:58:43,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2004 [2021-06-12 21:58:43,123 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:58:43,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:58:43,123 INFO L82 PathProgramCache]: Analyzing trace with hash 2027886398, now seen corresponding path program 49 times [2021-06-12 21:58:43,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:58:43,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598697664] [2021-06-12 21:58:43,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:58:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:58:43,317 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-06-12 21:58:43,436 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-06-12 21:58:43,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:58:43,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:58:43,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598697664] [2021-06-12 21:58:43,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598697664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:58:43,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102511096] [2021-06-12 21:58:43,695 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:58:43,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:58:43,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:58:43,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:58:44,047 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-06-12 21:58:44,095 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_263, v_prenex_259], 5=[A, v_prenex_261]} [2021-06-12 21:58:44,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:44,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:44,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:44,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 21:58:44,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:44,195 INFO L628 ElimStorePlain]: treesize reduction 150, result has 45.5 percent of original size [2021-06-12 21:58:44,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:44,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:44,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:44,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 21:58:44,200 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:44,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:44,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:44,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-12 21:58:44,234 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:44,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:44,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:44,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:58:44,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-12 21:58:44,265 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:44,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:44,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 21:58:44,290 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:314, output treesize:41 [2021-06-12 21:58:44,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:58:44,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102511096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:58:44,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:58:44,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-12 21:58:44,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740816505] [2021-06-12 21:58:44,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:58:44,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:58:44,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:58:44,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:58:44,337 INFO L87 Difference]: Start difference. First operand 1818 states and 6191 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:58:46,300 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 48 [2021-06-12 21:58:46,849 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-06-12 21:58:47,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:58:47,009 INFO L93 Difference]: Finished difference Result 2526 states and 8350 transitions. [2021-06-12 21:58:47,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 21:58:47,010 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:58:47,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:58:47,013 INFO L225 Difference]: With dead ends: 2526 [2021-06-12 21:58:47,013 INFO L226 Difference]: Without dead ends: 2511 [2021-06-12 21:58:47,013 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 2855.1ms TimeCoverageRelationStatistics Valid=534, Invalid=2222, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 21:58:47,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2021-06-12 21:58:47,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 1818. [2021-06-12 21:58:47,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.4072647220693453) internal successors, (6191), 1817 states have internal predecessors, (6191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:58:47,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6191 transitions. [2021-06-12 21:58:47,035 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6191 transitions. Word has length 26 [2021-06-12 21:58:47,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:58:47,035 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 6191 transitions. [2021-06-12 21:58:47,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:58:47,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6191 transitions. [2021-06-12 21:58:47,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:58:47,037 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:58:47,037 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:58:47,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2098,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:58:47,238 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:58:47,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:58:47,239 INFO L82 PathProgramCache]: Analyzing trace with hash 849981858, now seen corresponding path program 50 times [2021-06-12 21:58:47,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:58:47,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891279943] [2021-06-12 21:58:47,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:58:47,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:58:47,657 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:58:47,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:58:47,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891279943] [2021-06-12 21:58:47,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891279943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:58:47,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79810523] [2021-06-12 21:58:47,657 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:58:47,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:58:47,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:58:47,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:58:47,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:58:47,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:47,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:47,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:47,918 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-12 21:58:47,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-06-12 21:58:47,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:47,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:47,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:47,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:47,945 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-06-12 21:58:47,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 26 [2021-06-12 21:58:47,947 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:47,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:47,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:47,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:47,971 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-06-12 21:58:47,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-06-12 21:58:47,973 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:47,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:47,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:47,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:47,997 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-12 21:58:47,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-06-12 21:58:47,999 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:48,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,015 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 21:58:48,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-12 21:58:48,016 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:48,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,043 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-06-12 21:58:48,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-06-12 21:58:48,047 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:48,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,073 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-06-12 21:58:48,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 26 [2021-06-12 21:58:48,074 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:48,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,091 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 21:58:48,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-06-12 21:58:48,092 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:48,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,109 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 21:58:48,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-06-12 21:58:48,109 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:48,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,134 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-06-12 21:58:48,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 23 [2021-06-12 21:58:48,135 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:48,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:48,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-06-12 21:58:48,167 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:48,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,185 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 21:58:48,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-12 21:58:48,186 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:48,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,202 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 21:58:48,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-12 21:58:48,203 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:48,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,219 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 21:58:48,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-06-12 21:58:48,220 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:48,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,235 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 21:58:48,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-12 21:58:48,235 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:48,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:58:48,244 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 21:58:48,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-12 21:58:48,245 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:48,346 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-06-12 21:58:48,346 INFO L628 ElimStorePlain]: treesize reduction 76, result has 55.0 percent of original size [2021-06-12 21:58:48,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 21:58:48,347 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:753, output treesize:93 [2021-06-12 21:58:48,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:58:48,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79810523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:58:48,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:58:48,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-06-12 21:58:48,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339356726] [2021-06-12 21:58:48,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:58:48,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:58:48,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:58:48,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:58:48,446 INFO L87 Difference]: Start difference. First operand 1818 states and 6191 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:58:51,121 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-06-12 21:58:51,535 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-06-12 21:58:51,978 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-06-12 21:58:52,221 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-06-12 21:58:52,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:58:52,589 INFO L93 Difference]: Finished difference Result 3017 states and 9720 transitions. [2021-06-12 21:58:52,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 21:58:52,590 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:58:52,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:58:52,594 INFO L225 Difference]: With dead ends: 3017 [2021-06-12 21:58:52,594 INFO L226 Difference]: Without dead ends: 2970 [2021-06-12 21:58:52,594 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 3844.6ms TimeCoverageRelationStatistics Valid=708, Invalid=3452, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 21:58:52,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2970 states. [2021-06-12 21:58:52,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2970 to 1841. [2021-06-12 21:58:52,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 3.3967391304347827) internal successors, (6250), 1840 states have internal predecessors, (6250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:58:52,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 6250 transitions. [2021-06-12 21:58:52,621 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 6250 transitions. Word has length 26 [2021-06-12 21:58:52,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:58:52,621 INFO L482 AbstractCegarLoop]: Abstraction has 1841 states and 6250 transitions. [2021-06-12 21:58:52,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:58:52,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 6250 transitions. [2021-06-12 21:58:52,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:58:52,624 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:58:52,624 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:58:52,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2112 [2021-06-12 21:58:52,824 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:58:52,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:58:52,825 INFO L82 PathProgramCache]: Analyzing trace with hash -696255298, now seen corresponding path program 51 times [2021-06-12 21:58:52,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:58:52,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494770282] [2021-06-12 21:58:52,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:58:52,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:58:53,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:58:53,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:58:53,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494770282] [2021-06-12 21:58:53,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494770282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:58:53,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049021763] [2021-06-12 21:58:53,212 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:58:53,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:58:53,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:58:53,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 21:58:53,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:58:53,679 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-06-12 21:58:53,903 INFO L446 ElimStorePlain]: Different costs {5=[A, v_prenex_273, v_prenex_265, v_prenex_277, v_prenex_267, v_prenex_269], 6=[v_prenex_271, v_prenex_275]} [2021-06-12 21:58:53,986 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-12 21:58:53,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 51 [2021-06-12 21:58:53,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:54,068 INFO L354 Elim1Store]: treesize reduction 25, result has 39.0 percent of original size [2021-06-12 21:58:54,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 34 [2021-06-12 21:58:54,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:55,147 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 177 DAG size of output: 176 [2021-06-12 21:58:55,147 INFO L628 ElimStorePlain]: treesize reduction 5, result has 99.5 percent of original size [2021-06-12 21:58:55,193 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:55,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 59 [2021-06-12 21:58:55,207 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:55,255 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-12 21:58:55,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 43 [2021-06-12 21:58:55,260 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:56,776 WARN L205 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 183 DAG size of output: 171 [2021-06-12 21:58:56,777 INFO L628 ElimStorePlain]: treesize reduction 45, result has 95.3 percent of original size [2021-06-12 21:58:56,840 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-12 21:58:56,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-06-12 21:58:56,850 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:56,906 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-12 21:58:56,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-06-12 21:58:56,915 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:57,941 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 182 DAG size of output: 176 [2021-06-12 21:58:57,941 INFO L628 ElimStorePlain]: treesize reduction 44, result has 95.4 percent of original size [2021-06-12 21:58:58,002 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-12 21:58:58,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 55 [2021-06-12 21:58:58,008 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:58,053 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-12 21:58:58,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 48 [2021-06-12 21:58:58,062 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:59,043 WARN L205 SmtUtils]: Spent 980.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 167 [2021-06-12 21:58:59,044 INFO L628 ElimStorePlain]: treesize reduction 37, result has 96.0 percent of original size [2021-06-12 21:58:59,098 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-12 21:58:59,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 47 [2021-06-12 21:58:59,101 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:59,144 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-12 21:58:59,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 44 [2021-06-12 21:58:59,149 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:59,635 WARN L205 SmtUtils]: Spent 485.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-12 21:58:59,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:58:59,681 INFO L354 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2021-06-12 21:58:59,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 36 [2021-06-12 21:58:59,683 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 21:58:59,727 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-12 21:58:59,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 47 [2021-06-12 21:58:59,730 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:00,207 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2021-06-12 21:59:00,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:00,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:00,245 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:00,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-06-12 21:59:00,260 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:00,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:00,303 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-12 21:59:00,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-06-12 21:59:00,311 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:00,759 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-06-12 21:59:00,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:00,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:00,809 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-12 21:59:00,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-06-12 21:59:00,821 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:00,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:00,837 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-12 21:59:00,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 1 [2021-06-12 21:59:00,838 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:01,254 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-06-12 21:59:01,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:01,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-06-12 21:59:01,301 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:957, output treesize:1656 [2021-06-12 21:59:01,842 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 64 [2021-06-12 21:59:02,130 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-12 21:59:02,289 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:02,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049021763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:02,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:59:02,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 21:59:02,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345499476] [2021-06-12 21:59:02,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:59:02,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:59:02,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:59:02,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:59:02,290 INFO L87 Difference]: Start difference. First operand 1841 states and 6250 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:02,620 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-06-12 21:59:02,977 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 41 [2021-06-12 21:59:03,177 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-12 21:59:03,548 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 47 [2021-06-12 21:59:04,021 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2021-06-12 21:59:04,509 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-06-12 21:59:04,664 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-06-12 21:59:05,201 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 60 [2021-06-12 21:59:05,677 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 78 [2021-06-12 21:59:06,065 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2021-06-12 21:59:06,231 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 46 [2021-06-12 21:59:06,536 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 61 [2021-06-12 21:59:07,148 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 76 [2021-06-12 21:59:07,423 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 44 [2021-06-12 21:59:07,659 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 50 [2021-06-12 21:59:08,424 WARN L205 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 85 [2021-06-12 21:59:09,315 WARN L205 SmtUtils]: Spent 742.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 77 [2021-06-12 21:59:09,639 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 52 [2021-06-12 21:59:10,118 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2021-06-12 21:59:10,342 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 33 [2021-06-12 21:59:10,551 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 39 [2021-06-12 21:59:10,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:59:10,682 INFO L93 Difference]: Finished difference Result 3177 states and 10241 transitions. [2021-06-12 21:59:10,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 21:59:10,682 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:59:10,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:59:10,686 INFO L225 Difference]: With dead ends: 3177 [2021-06-12 21:59:10,686 INFO L226 Difference]: Without dead ends: 3132 [2021-06-12 21:59:10,687 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 9007.0ms TimeCoverageRelationStatistics Valid=674, Invalid=2986, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 21:59:10,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3132 states. [2021-06-12 21:59:10,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3132 to 1888. [2021-06-12 21:59:10,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1887 states have (on average 3.3995760466348703) internal successors, (6415), 1887 states have internal predecessors, (6415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:10,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 6415 transitions. [2021-06-12 21:59:10,714 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 6415 transitions. Word has length 26 [2021-06-12 21:59:10,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:59:10,714 INFO L482 AbstractCegarLoop]: Abstraction has 1888 states and 6415 transitions. [2021-06-12 21:59:10,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:10,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 6415 transitions. [2021-06-12 21:59:10,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:59:10,717 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:59:10,717 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:59:10,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2138 [2021-06-12 21:59:10,917 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:59:10,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:59:10,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1813857782, now seen corresponding path program 52 times [2021-06-12 21:59:10,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:59:10,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066415407] [2021-06-12 21:59:10,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:59:10,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:59:11,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:11,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:59:11,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066415407] [2021-06-12 21:59:11,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066415407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:11,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761669543] [2021-06-12 21:59:11,388 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:59:11,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:59:11,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:59:11,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:59:11,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:59:11,731 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-12 21:59:11,864 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_287], 6=[v_prenex_285, v_prenex_289]} [2021-06-12 21:59:11,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:11,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:11,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:11,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:11,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-12 21:59:11,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:11,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:11,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:11,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:11,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 13 [2021-06-12 21:59:11,880 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:11,997 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-06-12 21:59:11,997 INFO L628 ElimStorePlain]: treesize reduction 154, result has 43.2 percent of original size [2021-06-12 21:59:12,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:12,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-12 21:59:12,002 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:12,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:12,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:12,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:12,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:12,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 21:59:12,041 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:12,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:12,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:12,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:12,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:12,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 21:59:12,076 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:12,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:12,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 21:59:12,104 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:337, output treesize:55 [2021-06-12 21:59:12,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:12,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761669543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:12,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:59:12,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-12 21:59:12,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478347137] [2021-06-12 21:59:12,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:59:12,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:59:12,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:59:12,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:59:12,150 INFO L87 Difference]: Start difference. First operand 1888 states and 6415 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:13,430 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2021-06-12 21:59:13,621 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 41 [2021-06-12 21:59:14,105 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2021-06-12 21:59:14,273 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-06-12 21:59:14,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:59:14,477 INFO L93 Difference]: Finished difference Result 2395 states and 7935 transitions. [2021-06-12 21:59:14,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 21:59:14,478 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:59:14,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:59:14,481 INFO L225 Difference]: With dead ends: 2395 [2021-06-12 21:59:14,481 INFO L226 Difference]: Without dead ends: 2380 [2021-06-12 21:59:14,481 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 2470.1ms TimeCoverageRelationStatistics Valid=326, Invalid=1566, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 21:59:14,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-06-12 21:59:14,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 1886. [2021-06-12 21:59:14,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.39946949602122) internal successors, (6408), 1885 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:14,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6408 transitions. [2021-06-12 21:59:14,504 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6408 transitions. Word has length 26 [2021-06-12 21:59:14,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:59:14,504 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6408 transitions. [2021-06-12 21:59:14,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:14,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6408 transitions. [2021-06-12 21:59:14,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:59:14,506 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:59:14,506 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:59:14,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2263 [2021-06-12 21:59:14,707 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:59:14,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:59:14,707 INFO L82 PathProgramCache]: Analyzing trace with hash -782211534, now seen corresponding path program 53 times [2021-06-12 21:59:14,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:59:14,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453294770] [2021-06-12 21:59:14,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:59:14,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:59:15,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:15,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:59:15,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453294770] [2021-06-12 21:59:15,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453294770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:15,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880576170] [2021-06-12 21:59:15,064 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:59:15,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 21:59:15,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:59:15,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:59:15,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:59:15,574 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-06-12 21:59:15,777 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-06-12 21:59:15,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:15,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:16,022 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-12 21:59:16,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-06-12 21:59:16,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:16,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:16,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:16,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:16,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-12 21:59:16,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:16,455 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-12 21:59:16,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:16,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:16,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:16,497 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-12 21:59:16,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-06-12 21:59:16,500 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:16,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:16,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:16,527 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 21:59:16,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-06-12 21:59:16,531 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:16,901 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2021-06-12 21:59:16,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:16,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:16,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:16,935 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 21:59:16,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-06-12 21:59:16,937 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:16,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:16,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:16,962 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-12 21:59:16,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-06-12 21:59:16,964 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:17,322 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-06-12 21:59:17,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:17,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:17,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:17,358 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 21:59:17,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 33 [2021-06-12 21:59:17,360 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:17,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:17,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:17,385 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:17,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-06-12 21:59:17,392 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:18,024 WARN L205 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 140 [2021-06-12 21:59:18,025 INFO L628 ElimStorePlain]: treesize reduction 36, result has 94.8 percent of original size [2021-06-12 21:59:18,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:18,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:18,069 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:18,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 47 [2021-06-12 21:59:18,074 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:18,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:18,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:18,101 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 21:59:18,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-06-12 21:59:18,105 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:18,703 WARN L205 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 129 [2021-06-12 21:59:18,704 INFO L628 ElimStorePlain]: treesize reduction 38, result has 94.0 percent of original size [2021-06-12 21:59:18,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:18,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:18,732 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-12 21:59:18,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-06-12 21:59:18,734 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:18,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:18,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:18,759 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 21:59:18,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-06-12 21:59:18,762 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:19,032 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-12 21:59:19,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:19,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:19,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:19,064 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 21:59:19,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-06-12 21:59:19,068 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:19,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:19,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:19,081 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 21:59:19,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-12 21:59:19,082 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:19,309 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-12 21:59:19,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:19,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:19,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:19,336 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-12 21:59:19,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 26 [2021-06-12 21:59:19,338 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:19,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:19,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:19,363 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 21:59:19,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-06-12 21:59:19,367 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:19,771 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 97 [2021-06-12 21:59:19,772 INFO L628 ElimStorePlain]: treesize reduction 32, result has 92.7 percent of original size [2021-06-12 21:59:19,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-12 21:59:19,785 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:841, output treesize:391 [2021-06-12 21:59:19,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:19,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880576170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:19,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:59:19,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-06-12 21:59:19,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63605007] [2021-06-12 21:59:19,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:59:19,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:59:19,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:59:19,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:59:19,970 INFO L87 Difference]: Start difference. First operand 1886 states and 6408 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:20,300 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-06-12 21:59:20,562 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-06-12 21:59:25,020 WARN L205 SmtUtils]: Spent 3.26 s on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2021-06-12 21:59:28,209 WARN L205 SmtUtils]: Spent 2.90 s on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2021-06-12 21:59:29,148 WARN L205 SmtUtils]: Spent 883.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 154 [2021-06-12 21:59:29,367 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-12 21:59:29,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:59:29,630 INFO L93 Difference]: Finished difference Result 2712 states and 8977 transitions. [2021-06-12 21:59:29,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 21:59:29,630 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:59:29,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:59:29,634 INFO L225 Difference]: With dead ends: 2712 [2021-06-12 21:59:29,634 INFO L226 Difference]: Without dead ends: 2682 [2021-06-12 21:59:29,634 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 10060.0ms TimeCoverageRelationStatistics Valid=434, Invalid=2116, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 21:59:29,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2021-06-12 21:59:29,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 1886. [2021-06-12 21:59:29,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.39946949602122) internal successors, (6408), 1885 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:29,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6408 transitions. [2021-06-12 21:59:29,669 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6408 transitions. Word has length 26 [2021-06-12 21:59:29,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:59:29,669 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6408 transitions. [2021-06-12 21:59:29,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:29,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6408 transitions. [2021-06-12 21:59:29,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:59:29,672 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:59:29,672 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:59:29,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2277 [2021-06-12 21:59:29,895 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:59:29,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:59:29,895 INFO L82 PathProgramCache]: Analyzing trace with hash 376151132, now seen corresponding path program 54 times [2021-06-12 21:59:29,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:59:29,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851690282] [2021-06-12 21:59:29,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:59:29,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:59:30,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:30,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:59:30,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851690282] [2021-06-12 21:59:30,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851690282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:30,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572261419] [2021-06-12 21:59:30,390 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:59:30,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:59:30,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:59:30,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:59:30,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:59:30,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,643 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-12 21:59:30,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-06-12 21:59:30,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:30,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,675 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-12 21:59:30,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-06-12 21:59:30,679 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:30,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,696 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 21:59:30,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-06-12 21:59:30,697 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:30,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,714 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 21:59:30,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-12 21:59:30,714 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:30,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,741 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-06-12 21:59:30,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-06-12 21:59:30,745 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:30,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,769 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:30,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-06-12 21:59:30,776 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:30,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,792 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 21:59:30,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-06-12 21:59:30,793 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:30,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,810 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 21:59:30,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-12 21:59:30,811 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:30,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,827 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 21:59:30,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-06-12 21:59:30,827 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:30,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,852 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-06-12 21:59:30,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-06-12 21:59:30,853 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:30,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,869 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 21:59:30,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-12 21:59:30,870 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:30,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,886 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 21:59:30,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-12 21:59:30,887 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:30,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,903 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 21:59:30,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-12 21:59:30,903 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:30,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,919 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 21:59:30,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-12 21:59:30,920 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:30,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,934 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 21:59:30,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-06-12 21:59:30,935 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:30,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:30,944 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 21:59:30,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-12 21:59:30,945 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:30,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:30,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 21:59:30,986 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:753, output treesize:93 [2021-06-12 21:59:31,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:31,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572261419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:31,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:59:31,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 21:59:31,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636617908] [2021-06-12 21:59:31,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:59:31,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:59:31,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:59:31,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:59:31,081 INFO L87 Difference]: Start difference. First operand 1886 states and 6408 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-06-12 21:59:31,937 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-06-12 21:59:32,459 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-06-12 21:59:33,064 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2021-06-12 21:59:33,386 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-06-12 21:59:33,701 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-06-12 21:59:33,907 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-06-12 21:59:34,062 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-06-12 21:59:34,257 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-06-12 21:59:34,611 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-06-12 21:59:34,786 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2021-06-12 21:59:34,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:59:34,981 INFO L93 Difference]: Finished difference Result 3398 states and 10882 transitions. [2021-06-12 21:59:34,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 21:59:34,982 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 26 [2021-06-12 21:59:34,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:59:34,987 INFO L225 Difference]: With dead ends: 3398 [2021-06-12 21:59:34,987 INFO L226 Difference]: Without dead ends: 3364 [2021-06-12 21:59:34,987 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 3996.8ms TimeCoverageRelationStatistics Valid=768, Invalid=2424, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 21:59:34,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3364 states. [2021-06-12 21:59:35,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3364 to 1892. [2021-06-12 21:59:35,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.405076679005817) internal successors, (6439), 1891 states have internal predecessors, (6439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:35,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 6439 transitions. [2021-06-12 21:59:35,017 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 6439 transitions. Word has length 26 [2021-06-12 21:59:35,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:59:35,017 INFO L482 AbstractCegarLoop]: Abstraction has 1892 states and 6439 transitions. [2021-06-12 21:59:35,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-06-12 21:59:35,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 6439 transitions. [2021-06-12 21:59:35,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:59:35,019 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:59:35,019 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:59:35,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2347 [2021-06-12 21:59:35,220 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:59:35,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:59:35,221 INFO L82 PathProgramCache]: Analyzing trace with hash 871796194, now seen corresponding path program 33 times [2021-06-12 21:59:35,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:59:35,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846511928] [2021-06-12 21:59:35,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:59:35,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:59:35,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:35,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:59:35,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846511928] [2021-06-12 21:59:35,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846511928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:35,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205737371] [2021-06-12 21:59:35,618 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:59:35,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:59:35,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:59:35,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:59:35,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:59:36,111 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-06-12 21:59:36,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:36,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:36,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:59:36,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:36,401 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-06-12 21:59:36,402 INFO L628 ElimStorePlain]: treesize reduction 98, result has 60.6 percent of original size [2021-06-12 21:59:36,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:36,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:36,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:59:36,407 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:36,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:36,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:36,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:36,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:59:36,468 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:36,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:36,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:36,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:36,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:36,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:59:36,526 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:36,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:36,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:59:36,531 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:36,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:36,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 21:59:36,576 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:285, output treesize:51 [2021-06-12 21:59:36,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:36,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205737371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:36,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:59:36,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 21:59:36,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443293321] [2021-06-12 21:59:36,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:59:36,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:59:36,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:59:36,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:59:36,626 INFO L87 Difference]: Start difference. First operand 1892 states and 6439 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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) [2021-06-12 21:59:37,422 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-06-12 21:59:37,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:59:37,599 INFO L93 Difference]: Finished difference Result 2313 states and 7725 transitions. [2021-06-12 21:59:37,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:59:37,599 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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 26 [2021-06-12 21:59:37,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:59:37,602 INFO L225 Difference]: With dead ends: 2313 [2021-06-12 21:59:37,602 INFO L226 Difference]: Without dead ends: 2298 [2021-06-12 21:59:37,602 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1450.1ms TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:59:37,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-06-12 21:59:37,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 1884. [2021-06-12 21:59:37,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1883 states have (on average 3.4083908656399364) internal successors, (6418), 1883 states have internal predecessors, (6418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:37,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 6418 transitions. [2021-06-12 21:59:37,625 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 6418 transitions. Word has length 26 [2021-06-12 21:59:37,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:59:37,625 INFO L482 AbstractCegarLoop]: Abstraction has 1884 states and 6418 transitions. [2021-06-12 21:59:37,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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) [2021-06-12 21:59:37,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 6418 transitions. [2021-06-12 21:59:37,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:59:37,627 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:59:37,627 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:59:37,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2376 [2021-06-12 21:59:37,828 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:59:37,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:59:37,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1200955766, now seen corresponding path program 34 times [2021-06-12 21:59:37,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:59:37,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483340179] [2021-06-12 21:59:37,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:59:37,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:59:38,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:38,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:59:38,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483340179] [2021-06-12 21:59:38,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483340179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:38,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68067471] [2021-06-12 21:59:38,244 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:59:38,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:59:38,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:59:38,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:59:38,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:59:38,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:38,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:38,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:38,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:59:38,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:38,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:38,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:38,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:38,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 21:59:38,593 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:38,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:38,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:38,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:38,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:59:38,599 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:38,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:38,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:38,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:38,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 21:59:38,606 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:38,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:38,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:38,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:38,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:59:38,613 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:38,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:38,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:38,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:38,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:59:38,620 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:38,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:38,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:38,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:38,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 21:59:38,627 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:38,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:38,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:38,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:38,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 21:59:38,634 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:38,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:38,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:38,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:38,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:59:38,641 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:38,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:38,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:38,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:38,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:59:38,648 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:38,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:38,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:38,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:38,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:59:38,655 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:38,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:38,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:38,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:38,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-06-12 21:59:38,662 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:38,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:38,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:38,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:38,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:59:38,667 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:38,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:38,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:38,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:38,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:59:38,673 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:38,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:38,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:38,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:59:38,677 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:38,752 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-12 21:59:38,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 21:59:38,754 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-12 21:59:38,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:38,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68067471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:38,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:59:38,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 21:59:38,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869285016] [2021-06-12 21:59:38,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:59:38,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:59:38,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:59:38,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:59:38,805 INFO L87 Difference]: Start difference. First operand 1884 states and 6418 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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) [2021-06-12 21:59:39,088 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2021-06-12 21:59:39,211 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-06-12 21:59:39,445 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 39 [2021-06-12 21:59:39,942 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-06-12 21:59:40,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:59:40,168 INFO L93 Difference]: Finished difference Result 2549 states and 8455 transitions. [2021-06-12 21:59:40,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 21:59:40,168 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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 26 [2021-06-12 21:59:40,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:59:40,172 INFO L225 Difference]: With dead ends: 2549 [2021-06-12 21:59:40,172 INFO L226 Difference]: Without dead ends: 2534 [2021-06-12 21:59:40,172 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1578.4ms TimeCoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:59:40,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-06-12 21:59:40,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 1876. [2021-06-12 21:59:40,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 3.4074666666666666) internal successors, (6389), 1875 states have internal predecessors, (6389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:40,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 6389 transitions. [2021-06-12 21:59:40,196 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 6389 transitions. Word has length 26 [2021-06-12 21:59:40,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:59:40,196 INFO L482 AbstractCegarLoop]: Abstraction has 1876 states and 6389 transitions. [2021-06-12 21:59:40,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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) [2021-06-12 21:59:40,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 6389 transitions. [2021-06-12 21:59:40,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:59:40,198 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:59:40,198 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:59:40,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2396,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:59:40,399 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:59:40,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:59:40,399 INFO L82 PathProgramCache]: Analyzing trace with hash -179287784, now seen corresponding path program 35 times [2021-06-12 21:59:40,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:59:40,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970320937] [2021-06-12 21:59:40,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:59:40,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:59:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:40,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:59:40,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970320937] [2021-06-12 21:59:40,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970320937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:40,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075354783] [2021-06-12 21:59:40,746 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:59:40,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 21:59:40,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:59:40,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:59:40,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:59:41,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:41,353 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 21:59:41,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 21:59:41,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:41,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:41,370 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:41,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-12 21:59:41,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:41,525 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-12 21:59:41,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:41,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:41,549 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 21:59:41,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-12 21:59:41,551 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:41,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:41,572 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 21:59:41,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-12 21:59:41,575 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:41,718 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-12 21:59:41,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:41,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:41,736 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:41,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 21:59:41,738 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:41,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:41,755 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 21:59:41,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 21:59:41,756 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:41,894 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-06-12 21:59:41,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:41,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:41,916 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 21:59:41,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-12 21:59:41,920 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:41,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:41,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:41,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 21:59:41,937 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:42,077 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-06-12 21:59:42,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:42,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 21:59:42,098 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:314 [2021-06-12 21:59:42,313 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-06-12 21:59:42,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:42,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075354783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:42,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:59:42,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 21:59:42,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35633851] [2021-06-12 21:59:42,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:59:42,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:59:42,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:59:42,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:59:42,415 INFO L87 Difference]: Start difference. First operand 1876 states and 6389 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 21:59:43,131 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-06-12 21:59:43,322 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 48 [2021-06-12 21:59:43,640 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-06-12 21:59:44,015 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-06-12 21:59:44,237 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-12 21:59:44,517 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-06-12 21:59:44,836 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 28 [2021-06-12 21:59:44,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:59:44,908 INFO L93 Difference]: Finished difference Result 2284 states and 7582 transitions. [2021-06-12 21:59:44,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 21:59:44,908 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-06-12 21:59:44,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:59:44,911 INFO L225 Difference]: With dead ends: 2284 [2021-06-12 21:59:44,911 INFO L226 Difference]: Without dead ends: 2269 [2021-06-12 21:59:44,912 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2534.2ms TimeCoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:59:44,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2021-06-12 21:59:44,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 1867. [2021-06-12 21:59:44,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 3.404608788853162) internal successors, (6353), 1866 states have internal predecessors, (6353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:44,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 6353 transitions. [2021-06-12 21:59:44,937 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 6353 transitions. Word has length 26 [2021-06-12 21:59:44,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:59:44,937 INFO L482 AbstractCegarLoop]: Abstraction has 1867 states and 6353 transitions. [2021-06-12 21:59:44,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 21:59:44,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 6353 transitions. [2021-06-12 21:59:44,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:59:44,940 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:59:44,940 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:59:45,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2424,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:59:45,162 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:59:45,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:59:45,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1269968860, now seen corresponding path program 36 times [2021-06-12 21:59:45,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:59:45,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662430722] [2021-06-12 21:59:45,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:59:45,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:59:45,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:45,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:59:45,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662430722] [2021-06-12 21:59:45,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662430722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:45,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50715145] [2021-06-12 21:59:45,488 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:59:45,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:59:45,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:59:45,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:59:45,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:59:45,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:45,738 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:59:45,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:59:45,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:45,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:45,746 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:59:45,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:59:45,747 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:45,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:45,754 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:59:45,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:59:45,755 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:45,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:45,766 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:59:45,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 21:59:45,767 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:45,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:45,777 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:45,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 21:59:45,778 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:45,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:45,789 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:59:45,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 21:59:45,791 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:45,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:45,799 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:59:45,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:59:45,800 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:45,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:45,810 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:45,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 21:59:45,811 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:45,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:45,820 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:59:45,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 21:59:45,820 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:45,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:45,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:45,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 21:59:45,835 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:45,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:45,844 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:59:45,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 21:59:45,845 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:45,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:45,856 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:45,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 21:59:45,859 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:45,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:45,869 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:59:45,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 21:59:45,871 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:45,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:45,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:45,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 21:59:45,884 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:45,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:45,893 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:59:45,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 21:59:45,893 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:45,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:45,899 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:59:45,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 21:59:45,899 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:45,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:45,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 21:59:45,972 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-06-12 21:59:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:46,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50715145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:46,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:59:46,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 21:59:46,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454919993] [2021-06-12 21:59:46,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:59:46,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:59:46,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:59:46,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:59:46,151 INFO L87 Difference]: Start difference. First operand 1867 states and 6353 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:46,691 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-06-12 21:59:46,854 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-06-12 21:59:47,058 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2021-06-12 21:59:47,374 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-06-12 21:59:47,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:59:47,575 INFO L93 Difference]: Finished difference Result 2064 states and 6910 transitions. [2021-06-12 21:59:47,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:59:47,575 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:59:47,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:59:47,578 INFO L225 Difference]: With dead ends: 2064 [2021-06-12 21:59:47,578 INFO L226 Difference]: Without dead ends: 2049 [2021-06-12 21:59:47,579 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1579.8ms TimeCoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:59:47,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2021-06-12 21:59:47,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1860. [2021-06-12 21:59:47,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1859 states have (on average 3.4023668639053253) internal successors, (6325), 1859 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:47,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 6325 transitions. [2021-06-12 21:59:47,599 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 6325 transitions. Word has length 26 [2021-06-12 21:59:47,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:59:47,599 INFO L482 AbstractCegarLoop]: Abstraction has 1860 states and 6325 transitions. [2021-06-12 21:59:47,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:47,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 6325 transitions. [2021-06-12 21:59:47,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:59:47,601 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:59:47,601 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:59:47,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2491,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:59:47,802 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:59:47,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:59:47,802 INFO L82 PathProgramCache]: Analyzing trace with hash 663462910, now seen corresponding path program 37 times [2021-06-12 21:59:47,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:59:47,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263211867] [2021-06-12 21:59:47,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:59:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:59:48,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:48,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:59:48,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263211867] [2021-06-12 21:59:48,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263211867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:48,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502026587] [2021-06-12 21:59:48,169 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:59:48,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:59:48,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 21:59:48,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:59:48,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:48,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:48,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:48,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:59:48,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:48,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:48,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:48,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:48,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 21:59:48,597 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:48,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:48,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:48,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:48,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:59:48,603 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:48,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:48,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:48,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:48,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-06-12 21:59:48,609 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:48,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:48,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:48,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:48,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:59:48,615 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:48,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:48,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:48,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:48,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:59:48,620 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:48,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:48,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:48,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:48,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 21:59:48,626 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:48,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:48,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:48,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:48,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:59:48,632 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:48,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:48,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:48,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:48,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:59:48,637 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:48,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:48,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:48,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:48,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 21:59:48,643 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:48,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:48,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:48,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:48,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:59:48,649 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:48,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:48,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:48,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:48,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:59:48,655 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:48,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:48,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:48,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:48,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 21:59:48,660 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:48,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:48,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:48,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:48,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:59:48,666 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:48,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:48,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:48,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:59:48,670 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:48,746 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-12 21:59:48,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 21:59:48,748 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-12 21:59:48,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:48,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502026587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:48,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:59:48,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 21:59:48,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424693525] [2021-06-12 21:59:48,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:59:48,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:59:48,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:59:48,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:59:48,799 INFO L87 Difference]: Start difference. First operand 1860 states and 6325 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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) [2021-06-12 21:59:49,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:59:49,478 INFO L93 Difference]: Finished difference Result 2341 states and 7786 transitions. [2021-06-12 21:59:49,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:59:49,478 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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 26 [2021-06-12 21:59:49,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:59:49,481 INFO L225 Difference]: With dead ends: 2341 [2021-06-12 21:59:49,481 INFO L226 Difference]: Without dead ends: 2320 [2021-06-12 21:59:49,482 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 931.0ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:59:49,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-06-12 21:59:49,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1860. [2021-06-12 21:59:49,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1859 states have (on average 3.4023668639053253) internal successors, (6325), 1859 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:49,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 6325 transitions. [2021-06-12 21:59:49,503 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 6325 transitions. Word has length 26 [2021-06-12 21:59:49,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:59:49,503 INFO L482 AbstractCegarLoop]: Abstraction has 1860 states and 6325 transitions. [2021-06-12 21:59:49,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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) [2021-06-12 21:59:49,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 6325 transitions. [2021-06-12 21:59:49,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:59:49,505 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:59:49,505 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:59:49,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2508 [2021-06-12 21:59:49,706 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:59:49,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:59:49,706 INFO L82 PathProgramCache]: Analyzing trace with hash -716780640, now seen corresponding path program 38 times [2021-06-12 21:59:49,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:59:49,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574144180] [2021-06-12 21:59:49,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:59:49,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:59:49,894 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-06-12 21:59:50,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:50,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:59:50,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574144180] [2021-06-12 21:59:50,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574144180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:50,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925871531] [2021-06-12 21:59:50,053 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:59:50,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:59:50,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:59:50,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:59:50,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:59:50,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:50,387 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:59:50,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:59:50,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:50,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:50,398 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:59:50,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 21:59:50,399 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:50,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:50,409 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:59:50,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 21:59:50,410 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:50,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:50,420 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:59:50,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:59:50,420 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:50,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:50,430 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:59:50,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:59:50,431 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:50,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:50,441 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:59:50,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 21:59:50,442 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:50,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:50,454 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:50,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 21:59:50,459 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:50,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:50,469 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:59:50,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 21:59:50,470 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:50,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:50,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:50,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 21:59:50,485 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:50,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:50,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:50,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 21:59:50,497 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:50,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:50,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:50,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 21:59:50,510 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:50,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:50,521 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:50,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 21:59:50,524 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:50,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:50,535 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:59:50,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 21:59:50,536 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:50,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:50,548 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:59:50,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 21:59:50,549 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:50,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:50,560 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:59:50,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 21:59:50,561 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:50,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:50,567 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:59:50,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:59:50,567 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:50,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:50,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 21:59:50,656 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-06-12 21:59:50,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:50,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925871531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:50,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:59:50,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-12 21:59:50,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244806076] [2021-06-12 21:59:50,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:59:50,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:59:50,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:59:50,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:59:50,840 INFO L87 Difference]: Start difference. First operand 1860 states and 6325 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:51,427 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-06-12 21:59:52,046 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-06-12 21:59:52,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:59:52,101 INFO L93 Difference]: Finished difference Result 2236 states and 7452 transitions. [2021-06-12 21:59:52,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:59:52,101 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:59:52,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:59:52,104 INFO L225 Difference]: With dead ends: 2236 [2021-06-12 21:59:52,104 INFO L226 Difference]: Without dead ends: 2207 [2021-06-12 21:59:52,105 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1473.5ms TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:59:52,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-06-12 21:59:52,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 1840. [2021-06-12 21:59:52,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1840 states, 1839 states have (on average 3.3953235454051116) internal successors, (6244), 1839 states have internal predecessors, (6244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:52,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 6244 transitions. [2021-06-12 21:59:52,125 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 6244 transitions. Word has length 26 [2021-06-12 21:59:52,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:59:52,125 INFO L482 AbstractCegarLoop]: Abstraction has 1840 states and 6244 transitions. [2021-06-12 21:59:52,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:52,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 6244 transitions. [2021-06-12 21:59:52,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:59:52,127 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:59:52,127 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:59:52,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2542 [2021-06-12 21:59:52,328 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:59:52,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:59:52,328 INFO L82 PathProgramCache]: Analyzing trace with hash 794427266, now seen corresponding path program 39 times [2021-06-12 21:59:52,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:59:52,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362998248] [2021-06-12 21:59:52,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:59:52,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:59:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:52,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:59:52,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362998248] [2021-06-12 21:59:52,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362998248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:52,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795513412] [2021-06-12 21:59:52,614 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:59:52,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:59:52,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:59:52,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:59:52,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:59:53,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:53,115 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 21:59:53,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-12 21:59:53,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:53,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:53,147 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 21:59:53,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-12 21:59:53,149 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:53,304 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-12 21:59:53,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:53,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:53,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:53,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 21:59:53,326 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:53,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:53,345 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 21:59:53,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-06-12 21:59:53,346 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:53,639 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-06-12 21:59:53,639 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.1 percent of original size [2021-06-12 21:59:53,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:53,657 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:53,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-12 21:59:53,661 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:53,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:53,678 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 21:59:53,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 21:59:53,679 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:53,815 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-12 21:59:53,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:53,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:53,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:53,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-12 21:59:53,841 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:53,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:53,859 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 21:59:53,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 21:59:53,861 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:54,123 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-06-12 21:59:54,123 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.5 percent of original size [2021-06-12 21:59:54,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 21:59:54,139 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:259 [2021-06-12 21:59:54,325 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-06-12 21:59:54,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:54,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795513412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:54,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:59:54,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-12 21:59:54,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806402448] [2021-06-12 21:59:54,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:59:54,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:59:54,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:59:54,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:59:54,420 INFO L87 Difference]: Start difference. First operand 1840 states and 6244 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:55,090 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-06-12 21:59:55,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:59:55,311 INFO L93 Difference]: Finished difference Result 2047 states and 6843 transitions. [2021-06-12 21:59:55,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:59:55,311 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:59:55,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:59:55,314 INFO L225 Difference]: With dead ends: 2047 [2021-06-12 21:59:55,314 INFO L226 Difference]: Without dead ends: 2022 [2021-06-12 21:59:55,314 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1268.9ms TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:59:55,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-06-12 21:59:55,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1822. [2021-06-12 21:59:55,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1821 states have (on average 3.399231191652938) internal successors, (6190), 1821 states have internal predecessors, (6190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:55,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 6190 transitions. [2021-06-12 21:59:55,335 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 6190 transitions. Word has length 26 [2021-06-12 21:59:55,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:59:55,335 INFO L482 AbstractCegarLoop]: Abstraction has 1822 states and 6190 transitions. [2021-06-12 21:59:55,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:55,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 6190 transitions. [2021-06-12 21:59:55,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:59:55,337 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:59:55,337 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:59:55,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2581,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:59:55,537 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:59:55,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:59:55,538 INFO L82 PathProgramCache]: Analyzing trace with hash 827344434, now seen corresponding path program 40 times [2021-06-12 21:59:55,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:59:55,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566083270] [2021-06-12 21:59:55,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:59:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:59:55,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:55,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:59:55,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566083270] [2021-06-12 21:59:55,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566083270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:55,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357692541] [2021-06-12 21:59:55,923 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:59:55,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:59:55,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:59:55,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:59:55,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:59:56,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:56,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:56,203 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:59:56,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 21:59:56,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:56,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:56,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:56,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:56,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-06-12 21:59:56,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:56,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:56,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:56,241 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:59:56,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-06-12 21:59:56,243 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:56,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:56,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:56,257 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:59:56,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 21:59:56,258 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:56,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:56,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:56,276 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:56,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-06-12 21:59:56,277 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:56,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:56,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:56,291 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:59:56,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 21:59:56,292 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:56,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:56,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:56,305 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:59:56,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 21:59:56,306 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:56,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:56,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:56,320 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:56,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-06-12 21:59:56,324 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:56,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:56,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:56,336 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:59:56,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 21:59:56,337 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:56,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:56,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:56,351 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:56,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 24 [2021-06-12 21:59:56,355 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:56,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:56,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:56,367 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:59:56,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 21:59:56,368 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:56,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:56,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:56,380 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:59:56,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-12 21:59:56,380 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:56,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:56,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:56,394 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:59:56,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-06-12 21:59:56,396 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:56,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:56,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:56,407 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 21:59:56,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 21:59:56,408 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:56,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:56,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:56,422 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:56,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-06-12 21:59:56,423 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:56,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:56,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:56,432 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 21:59:56,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 20 [2021-06-12 21:59:56,433 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:56,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:59:56,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 21:59:56,510 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:729, output treesize:181 [2021-06-12 21:59:56,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:56,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357692541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:56,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:59:56,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 21:59:56,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048378091] [2021-06-12 21:59:56,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:59:56,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:59:56,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:59:56,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:59:56,721 INFO L87 Difference]: Start difference. First operand 1822 states and 6190 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:57,313 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-06-12 21:59:57,865 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-06-12 21:59:58,009 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-06-12 21:59:58,275 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-06-12 21:59:58,590 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-06-12 21:59:58,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:59:58,652 INFO L93 Difference]: Finished difference Result 2419 states and 8019 transitions. [2021-06-12 21:59:58,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 21:59:58,652 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 21:59:58,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:59:58,655 INFO L225 Difference]: With dead ends: 2419 [2021-06-12 21:59:58,655 INFO L226 Difference]: Without dead ends: 2400 [2021-06-12 21:59:58,655 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2178.0ms TimeCoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 21:59:58,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-06-12 21:59:58,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 1803. [2021-06-12 21:59:58,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1802 states have (on average 3.3990011098779136) internal successors, (6125), 1802 states have internal predecessors, (6125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:58,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 6125 transitions. [2021-06-12 21:59:58,678 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 6125 transitions. Word has length 26 [2021-06-12 21:59:58,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:59:58,678 INFO L482 AbstractCegarLoop]: Abstraction has 1803 states and 6125 transitions. [2021-06-12 21:59:58,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:59:58,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 6125 transitions. [2021-06-12 21:59:58,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:59:58,680 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:59:58,680 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:59:58,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2637,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:59:58,881 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:59:58,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:59:58,881 INFO L82 PathProgramCache]: Analyzing trace with hash 305289786, now seen corresponding path program 41 times [2021-06-12 21:59:58,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:59:58,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907356916] [2021-06-12 21:59:58,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:59:58,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:59:59,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:59,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:59:59,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907356916] [2021-06-12 21:59:59,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907356916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:59,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716216388] [2021-06-12 21:59:59,230 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:59:59,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:59:59,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:59:59,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 21:59:59,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:59:59,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:59,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:59,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:59,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:59:59,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:59,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:59,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:59,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:59,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:59:59,629 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:59,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:59,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:59,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:59,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:59:59,634 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:59,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:59,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:59,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:59,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:59:59,640 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:59,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:59,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:59,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:59,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 21:59:59,645 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:59,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:59,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:59,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:59,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:59:59,651 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:59,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:59,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:59,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:59,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 21:59:59,657 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:59,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:59,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:59,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:59,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-06-12 21:59:59,662 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:59,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:59,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:59,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:59,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 21:59:59,668 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:59,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:59,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:59,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:59,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 21:59:59,673 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:59,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:59,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:59,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:59,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:59:59,678 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:59,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:59,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:59,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:59,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-12 21:59:59,685 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:59,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:59,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:59,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:59,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:59:59,690 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:59,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:59,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:59,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:59,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 21:59:59,696 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:59,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:59:59,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:59:59,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 21:59:59,700 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 21:59:59,778 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-12 21:59:59,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 21:59:59,780 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-12 21:59:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:59:59,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716216388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:59:59,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:59:59,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 21:59:59,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643944545] [2021-06-12 21:59:59,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:59:59,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:59:59,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:59:59,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:59:59,848 INFO L87 Difference]: Start difference. First operand 1803 states and 6125 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:00,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:00:00,696 INFO L93 Difference]: Finished difference Result 2310 states and 7688 transitions. [2021-06-12 22:00:00,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:00:00,697 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:00:00,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:00:00,700 INFO L225 Difference]: With dead ends: 2310 [2021-06-12 22:00:00,700 INFO L226 Difference]: Without dead ends: 2295 [2021-06-12 22:00:00,700 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1112.0ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:00:00,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2021-06-12 22:00:00,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 1848. [2021-06-12 22:00:00,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 3.394152680021657) internal successors, (6269), 1847 states have internal predecessors, (6269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:00,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 6269 transitions. [2021-06-12 22:00:00,723 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 6269 transitions. Word has length 26 [2021-06-12 22:00:00,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:00:00,723 INFO L482 AbstractCegarLoop]: Abstraction has 1848 states and 6269 transitions. [2021-06-12 22:00:00,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:00,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 6269 transitions. [2021-06-12 22:00:00,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:00:00,725 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:00:00,725 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:00:00,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2662 [2021-06-12 22:00:00,926 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:00:00,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:00:00,926 INFO L82 PathProgramCache]: Analyzing trace with hash 137480694, now seen corresponding path program 42 times [2021-06-12 22:00:00,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:00:00,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841884676] [2021-06-12 22:00:00,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:00:00,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:00:01,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:00:01,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:00:01,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841884676] [2021-06-12 22:00:01,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841884676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:00:01,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486185048] [2021-06-12 22:00:01,278 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:00:01,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:00:01,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:00:01,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:00:01,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:00:01,608 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:00:01,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:00:01,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:01,618 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:00:01,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:00:01,619 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:01,637 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:00:01,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:00:01,639 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:01,662 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:00:01,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:00:01,665 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:01,678 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:00:01,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:00:01,679 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:01,692 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:00:01,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 22:00:01,693 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:01,714 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:01,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-12 22:00:01,719 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:01,739 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:00:01,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-12 22:00:01,743 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:01,759 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:01,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 22:00:01,760 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:01,787 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:00:01,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-12 22:00:01,789 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:01,798 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:00:01,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:00:01,799 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:01,808 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:00:01,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 22:00:01,809 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:01,829 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:00:01,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-12 22:00:01,833 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:01,843 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:00:01,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:00:01,844 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:01,853 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:00:01,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:00:01,854 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:01,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:01,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 22:00:01,869 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:01,985 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-06-12 22:00:01,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:01,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:00:01,998 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:769, output treesize:357 [2021-06-12 22:00:02,229 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-06-12 22:00:02,442 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-06-12 22:00:02,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:00:02,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486185048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:00:02,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:00:02,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-12 22:00:02,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130912653] [2021-06-12 22:00:02,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:00:02,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:00:02,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:00:02,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:00:02,571 INFO L87 Difference]: Start difference. First operand 1848 states and 6269 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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) [2021-06-12 22:00:03,022 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-06-12 22:00:03,385 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-06-12 22:00:03,559 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2021-06-12 22:00:03,747 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-06-12 22:00:04,003 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-06-12 22:00:04,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:00:04,074 INFO L93 Difference]: Finished difference Result 2570 states and 8519 transitions. [2021-06-12 22:00:04,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:00:04,074 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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 26 [2021-06-12 22:00:04,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:00:04,078 INFO L225 Difference]: With dead ends: 2570 [2021-06-12 22:00:04,078 INFO L226 Difference]: Without dead ends: 2555 [2021-06-12 22:00:04,078 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2123.0ms TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:00:04,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2021-06-12 22:00:04,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 1848. [2021-06-12 22:00:04,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 3.394152680021657) internal successors, (6269), 1847 states have internal predecessors, (6269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:04,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 6269 transitions. [2021-06-12 22:00:04,103 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 6269 transitions. Word has length 26 [2021-06-12 22:00:04,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:00:04,104 INFO L482 AbstractCegarLoop]: Abstraction has 1848 states and 6269 transitions. [2021-06-12 22:00:04,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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) [2021-06-12 22:00:04,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 6269 transitions. [2021-06-12 22:00:04,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:00:04,127 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:00:04,127 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:00:04,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2690 [2021-06-12 22:00:04,327 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:00:04,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:00:04,328 INFO L82 PathProgramCache]: Analyzing trace with hash 436254142, now seen corresponding path program 43 times [2021-06-12 22:00:04,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:00:04,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001428318] [2021-06-12 22:00:04,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:00:04,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:00:04,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:00:04,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:00:04,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001428318] [2021-06-12 22:00:04,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001428318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:00:04,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345303198] [2021-06-12 22:00:04,574 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:00:04,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:00:04,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:00:04,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:00:04,896 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_327, v_prenex_329], 3=[A, v_prenex_331]} [2021-06-12 22:00:04,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:04,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:04,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:04,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:00:04,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:04,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:04,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:04,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:00:04,911 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:05,057 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-06-12 22:00:05,058 INFO L628 ElimStorePlain]: treesize reduction 129, result has 54.9 percent of original size [2021-06-12 22:00:05,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:05,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:05,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:05,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:00:05,065 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:05,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:05,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:05,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:00:05,071 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:05,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:05,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:05,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:00:05,121 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:05,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:05,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:05,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:05,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 22:00:05,167 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:05,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:05,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:00:05,208 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:325, output treesize:51 [2021-06-12 22:00:05,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:00:05,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345303198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:00:05,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:00:05,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:00:05,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174375883] [2021-06-12 22:00:05,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:00:05,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:00:05,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:00:05,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:00:05,268 INFO L87 Difference]: Start difference. First operand 1848 states and 6269 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:05,980 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-06-12 22:00:06,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:00:06,113 INFO L93 Difference]: Finished difference Result 2415 states and 7997 transitions. [2021-06-12 22:00:06,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:00:06,114 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:00:06,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:00:06,117 INFO L225 Difference]: With dead ends: 2415 [2021-06-12 22:00:06,117 INFO L226 Difference]: Without dead ends: 2385 [2021-06-12 22:00:06,117 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1002.6ms TimeCoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:00:06,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2021-06-12 22:00:06,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 1850. [2021-06-12 22:00:06,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1850 states, 1849 states have (on average 3.3958896700919414) internal successors, (6279), 1849 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:06,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 6279 transitions. [2021-06-12 22:00:06,139 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 6279 transitions. Word has length 26 [2021-06-12 22:00:06,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:00:06,140 INFO L482 AbstractCegarLoop]: Abstraction has 1850 states and 6279 transitions. [2021-06-12 22:00:06,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:06,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 6279 transitions. [2021-06-12 22:00:06,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:00:06,142 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:00:06,142 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:00:06,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2741 [2021-06-12 22:00:06,342 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:00:06,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:00:06,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1514157122, now seen corresponding path program 44 times [2021-06-12 22:00:06,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:00:06,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995414805] [2021-06-12 22:00:06,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:00:06,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:00:06,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:00:06,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:00:06,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995414805] [2021-06-12 22:00:06,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995414805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:00:06,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709433676] [2021-06-12 22:00:06,677 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:00:06,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:00:06,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:00:06,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:00:06,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:00:06,913 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-06-12 22:00:07,064 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-06-12 22:00:07,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:07,277 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:00:07,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-12 22:00:07,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:07,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:07,302 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:00:07,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-12 22:00:07,304 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:07,464 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-12 22:00:07,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:07,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:07,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:07,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-12 22:00:07,489 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:07,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:07,507 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:00:07,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:00:07,509 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:07,663 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-12 22:00:07,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:07,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:07,683 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:07,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 22:00:07,687 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:07,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:07,707 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:00:07,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-06-12 22:00:07,709 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:08,001 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2021-06-12 22:00:08,002 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.0 percent of original size [2021-06-12 22:00:08,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:08,019 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:08,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-12 22:00:08,025 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:08,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:08,041 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:00:08,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:00:08,043 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:08,300 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-06-12 22:00:08,300 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.7 percent of original size [2021-06-12 22:00:08,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:00:08,317 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:365, output treesize:256 [2021-06-12 22:00:08,523 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-12 22:00:08,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:00:08,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709433676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:00:08,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:00:08,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 22:00:08,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052104500] [2021-06-12 22:00:08,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:00:08,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:00:08,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:00:08,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:00:08,619 INFO L87 Difference]: Start difference. First operand 1850 states and 6279 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:09,086 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-06-12 22:00:09,593 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-06-12 22:00:09,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:00:09,621 INFO L93 Difference]: Finished difference Result 2425 states and 8078 transitions. [2021-06-12 22:00:09,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:00:09,621 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:00:09,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:00:09,624 INFO L225 Difference]: With dead ends: 2425 [2021-06-12 22:00:09,624 INFO L226 Difference]: Without dead ends: 2410 [2021-06-12 22:00:09,624 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1593.7ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:00:09,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2021-06-12 22:00:09,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 1868. [2021-06-12 22:00:09,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 3.392072844134976) internal successors, (6333), 1867 states have internal predecessors, (6333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:09,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 6333 transitions. [2021-06-12 22:00:09,647 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 6333 transitions. Word has length 26 [2021-06-12 22:00:09,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:00:09,648 INFO L482 AbstractCegarLoop]: Abstraction has 1868 states and 6333 transitions. [2021-06-12 22:00:09,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:09,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 6333 transitions. [2021-06-12 22:00:09,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:00:09,650 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:00:09,650 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:00:09,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2752,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:00:09,850 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:00:09,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:00:09,851 INFO L82 PathProgramCache]: Analyzing trace with hash -714815838, now seen corresponding path program 45 times [2021-06-12 22:00:09,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:00:09,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229578139] [2021-06-12 22:00:09,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:00:09,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:00:10,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:00:10,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:00:10,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229578139] [2021-06-12 22:00:10,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229578139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:00:10,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718245444] [2021-06-12 22:00:10,254 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:00:10,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:00:10,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:00:10,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:00:10,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:00:10,738 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-12 22:00:10,990 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 55 [2021-06-12 22:00:11,070 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_349, v_prenex_347], 2=[A, v_prenex_348]} [2021-06-12 22:00:11,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:11,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:00:11,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:11,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:11,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 22:00:11,084 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:11,224 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-06-12 22:00:11,225 INFO L628 ElimStorePlain]: treesize reduction 114, result has 55.3 percent of original size [2021-06-12 22:00:11,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:11,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:00:11,230 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:11,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:11,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:11,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:11,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:11,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:00:11,289 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:11,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:11,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:11,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:00:11,294 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:11,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:11,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:11,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:11,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:00:11,355 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:11,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:11,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:00:11,397 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:285, output treesize:51 [2021-06-12 22:00:11,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:00:11,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718245444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:00:11,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:00:11,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:00:11,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790941182] [2021-06-12 22:00:11,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:00:11,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:00:11,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:00:11,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:00:11,455 INFO L87 Difference]: Start difference. First operand 1868 states and 6333 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:12,271 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-12 22:00:12,517 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 61 [2021-06-12 22:00:12,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:00:12,619 INFO L93 Difference]: Finished difference Result 2321 states and 7745 transitions. [2021-06-12 22:00:12,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:00:12,620 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:00:12,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:00:12,623 INFO L225 Difference]: With dead ends: 2321 [2021-06-12 22:00:12,623 INFO L226 Difference]: Without dead ends: 2306 [2021-06-12 22:00:12,623 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1857.9ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:00:12,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2021-06-12 22:00:12,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 1889. [2021-06-12 22:00:12,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1888 states have (on average 3.3887711864406778) internal successors, (6398), 1888 states have internal predecessors, (6398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:12,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 6398 transitions. [2021-06-12 22:00:12,645 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 6398 transitions. Word has length 26 [2021-06-12 22:00:12,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:00:12,645 INFO L482 AbstractCegarLoop]: Abstraction has 1889 states and 6398 transitions. [2021-06-12 22:00:12,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:12,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 6398 transitions. [2021-06-12 22:00:12,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:00:12,647 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:00:12,647 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:00:12,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2810 [2021-06-12 22:00:12,848 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:00:12,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:00:12,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1962618678, now seen corresponding path program 46 times [2021-06-12 22:00:12,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:00:12,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110025362] [2021-06-12 22:00:12,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:00:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:00:13,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:00:13,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:00:13,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110025362] [2021-06-12 22:00:13,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110025362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:00:13,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104815930] [2021-06-12 22:00:13,212 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:00:13,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:00:13,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:00:13,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:00:13,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:00:13,659 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-12 22:00:13,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:13,720 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:13,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:00:13,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:13,838 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-12 22:00:13,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:13,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:13,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:13,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:00:13,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:13,963 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-12 22:00:13,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:13,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:13,976 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:00:13,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:00:13,977 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:14,085 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-12 22:00:14,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:14,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:14,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:14,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:00:14,099 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:14,206 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-12 22:00:14,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:14,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:14,219 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:00:14,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 22:00:14,221 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:14,325 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-12 22:00:14,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:14,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:14,337 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:00:14,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:00:14,338 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:14,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:14,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:14,450 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:14,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:00:14,452 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:14,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:14,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:14,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:14,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:00:14,561 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:14,676 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-12 22:00:14,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:14,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:00:14,683 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-06-12 22:00:14,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:00:14,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104815930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:00:14,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:00:14,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:00:14,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428763223] [2021-06-12 22:00:14,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:00:14,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:00:14,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:00:14,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:00:14,873 INFO L87 Difference]: Start difference. First operand 1889 states and 6398 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:15,629 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-12 22:00:16,014 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2021-06-12 22:00:16,333 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-12 22:00:16,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:00:16,536 INFO L93 Difference]: Finished difference Result 2617 states and 8667 transitions. [2021-06-12 22:00:16,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:00:16,536 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:00:16,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:00:16,540 INFO L225 Difference]: With dead ends: 2617 [2021-06-12 22:00:16,540 INFO L226 Difference]: Without dead ends: 2602 [2021-06-12 22:00:16,540 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2083.7ms TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:00:16,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2021-06-12 22:00:16,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 1886. [2021-06-12 22:00:16,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.389920424403183) internal successors, (6390), 1885 states have internal predecessors, (6390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:16,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6390 transitions. [2021-06-12 22:00:16,569 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6390 transitions. Word has length 26 [2021-06-12 22:00:16,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:00:16,569 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6390 transitions. [2021-06-12 22:00:16,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:16,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6390 transitions. [2021-06-12 22:00:16,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:00:16,571 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:00:16,571 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:00:16,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2825,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:00:16,777 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:00:16,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:00:16,777 INFO L82 PathProgramCache]: Analyzing trace with hash 272675774, now seen corresponding path program 47 times [2021-06-12 22:00:16,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:00:16,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519467959] [2021-06-12 22:00:16,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:00:16,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:00:17,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:00:17,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:00:17,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519467959] [2021-06-12 22:00:17,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519467959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:00:17,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604590164] [2021-06-12 22:00:17,082 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:00:17,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:00:17,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:00:17,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:00:17,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:00:17,505 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-06-12 22:00:17,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:17,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:17,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:00:17,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:17,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:17,638 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:00:17,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:00:17,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:17,796 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-12 22:00:17,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:17,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:17,809 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:17,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:00:17,811 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:17,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:17,821 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:00:17,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:00:17,823 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:17,943 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-12 22:00:17,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:17,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:17,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:17,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:00:17,960 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:17,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:17,970 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:00:17,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 22:00:17,972 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:18,078 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-06-12 22:00:18,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:18,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:18,090 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:18,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:00:18,091 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:18,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:18,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:18,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:00:18,103 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:18,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:18,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:00:18,209 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:325, output treesize:174 [2021-06-12 22:00:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:00:18,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604590164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:00:18,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:00:18,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:00:18,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976197016] [2021-06-12 22:00:18,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:00:18,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:00:18,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:00:18,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:00:18,415 INFO L87 Difference]: Start difference. First operand 1886 states and 6390 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:19,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:00:19,378 INFO L93 Difference]: Finished difference Result 2461 states and 8175 transitions. [2021-06-12 22:00:19,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:00:19,378 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:00:19,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:00:19,382 INFO L225 Difference]: With dead ends: 2461 [2021-06-12 22:00:19,382 INFO L226 Difference]: Without dead ends: 2436 [2021-06-12 22:00:19,382 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1372.7ms TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:00:19,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-06-12 22:00:19,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 1886. [2021-06-12 22:00:19,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.3920424403183023) internal successors, (6394), 1885 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) [2021-06-12 22:00:19,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6394 transitions. [2021-06-12 22:00:19,415 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6394 transitions. Word has length 26 [2021-06-12 22:00:19,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:00:19,415 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6394 transitions. [2021-06-12 22:00:19,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:19,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6394 transitions. [2021-06-12 22:00:19,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:00:19,417 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:00:19,417 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:00:19,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2842 [2021-06-12 22:00:19,619 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:00:19,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:00:19,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1537750790, now seen corresponding path program 48 times [2021-06-12 22:00:19,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:00:19,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144010181] [2021-06-12 22:00:19,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:00:19,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:00:19,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:00:19,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:00:19,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144010181] [2021-06-12 22:00:19,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144010181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:00:19,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841341106] [2021-06-12 22:00:19,969 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:00:19,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:00:19,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:00:19,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:00:19,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:00:20,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:20,194 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:00:20,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:00:20,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:20,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:20,203 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:00:20,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:00:20,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:20,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:20,211 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:00:20,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:00:20,212 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:20,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:20,223 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:00:20,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:00:20,224 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:20,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:20,235 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:20,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:00:20,236 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:20,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:20,247 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:00:20,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:00:20,248 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:20,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:20,256 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:00:20,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:00:20,257 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:20,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:20,268 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:20,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:00:20,269 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:20,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:20,277 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:00:20,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 22:00:20,278 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:20,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:20,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:20,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:00:20,292 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:20,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:20,302 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:00:20,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 22:00:20,302 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:20,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:20,314 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:20,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:00:20,316 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:20,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:20,328 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:00:20,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 22:00:20,330 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:20,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:20,340 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:20,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:00:20,344 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:20,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:20,352 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:00:20,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:00:20,353 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:20,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:20,358 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:00:20,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:00:20,359 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:20,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:20,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:00:20,434 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-06-12 22:00:20,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:00:20,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841341106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:00:20,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:00:20,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:00:20,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575653976] [2021-06-12 22:00:20,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:00:20,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:00:20,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:00:20,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:00:20,640 INFO L87 Difference]: Start difference. First operand 1886 states and 6394 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:21,380 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 22:00:21,560 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-06-12 22:00:21,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:00:21,624 INFO L93 Difference]: Finished difference Result 2412 states and 8043 transitions. [2021-06-12 22:00:21,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:00:21,624 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:00:21,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:00:21,628 INFO L225 Difference]: With dead ends: 2412 [2021-06-12 22:00:21,628 INFO L226 Difference]: Without dead ends: 2397 [2021-06-12 22:00:21,628 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1302.3ms TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:00:21,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2397 states. [2021-06-12 22:00:21,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2397 to 1886. [2021-06-12 22:00:21,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.3920424403183023) internal successors, (6394), 1885 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) [2021-06-12 22:00:21,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6394 transitions. [2021-06-12 22:00:21,652 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6394 transitions. Word has length 26 [2021-06-12 22:00:21,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:00:21,652 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6394 transitions. [2021-06-12 22:00:21,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:21,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6394 transitions. [2021-06-12 22:00:21,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:00:21,654 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:00:21,654 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:00:21,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2875,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:00:21,855 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:00:21,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:00:21,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1872442310, now seen corresponding path program 55 times [2021-06-12 22:00:21,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:00:21,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064991268] [2021-06-12 22:00:21,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:00:21,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:00:22,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:00:22,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:00:22,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064991268] [2021-06-12 22:00:22,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064991268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:00:22,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034636326] [2021-06-12 22:00:22,281 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:00:22,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:00:22,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:00:22,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:00:22,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:22,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:00:22,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:22,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:22,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-12 22:00:22,799 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:22,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:22,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:00:22,806 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:22,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:22,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-12 22:00:22,814 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:22,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:22,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-12 22:00:22,839 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:22,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:22,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-12 22:00:22,850 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:22,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:22,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:00:22,857 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:22,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:22,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:00:22,865 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:22,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:22,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-12 22:00:22,872 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:22,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:22,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-12 22:00:22,880 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:22,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:22,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-12 22:00:22,888 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:22,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:22,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:00:22,895 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:22,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:22,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-12 22:00:22,902 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:22,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:22,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:00:22,909 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:22,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:22,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:22,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-12 22:00:22,914 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:22,940 INFO L628 ElimStorePlain]: treesize reduction 32, result has 45.8 percent of original size [2021-06-12 22:00:22,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:00:22,941 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-12 22:00:22,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:00:22,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034636326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:00:22,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:00:22,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-12 22:00:22,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881667751] [2021-06-12 22:00:22,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:00:22,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:00:22,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:00:22,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:00:22,970 INFO L87 Difference]: Start difference. First operand 1886 states and 6394 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:23,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:00:23,702 INFO L93 Difference]: Finished difference Result 2181 states and 7107 transitions. [2021-06-12 22:00:23,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:00:23,702 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:00:23,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:00:23,705 INFO L225 Difference]: With dead ends: 2181 [2021-06-12 22:00:23,705 INFO L226 Difference]: Without dead ends: 2144 [2021-06-12 22:00:23,706 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1031.0ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:00:23,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2021-06-12 22:00:23,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 1906. [2021-06-12 22:00:23,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 3.391076115485564) internal successors, (6460), 1905 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:23,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 6460 transitions. [2021-06-12 22:00:23,728 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 6460 transitions. Word has length 26 [2021-06-12 22:00:23,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:00:23,728 INFO L482 AbstractCegarLoop]: Abstraction has 1906 states and 6460 transitions. [2021-06-12 22:00:23,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:23,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 6460 transitions. [2021-06-12 22:00:23,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:00:23,730 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:00:23,730 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:00:23,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2892 [2021-06-12 22:00:23,931 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:00:23,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:00:23,931 INFO L82 PathProgramCache]: Analyzing trace with hash -804567746, now seen corresponding path program 56 times [2021-06-12 22:00:23,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:00:23,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533221709] [2021-06-12 22:00:23,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:00:23,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:00:24,272 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:00:24,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:00:24,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533221709] [2021-06-12 22:00:24,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533221709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:00:24,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395684932] [2021-06-12 22:00:24,273 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:00:24,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:00:24,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:00:24,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:00:24,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:00:24,536 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-06-12 22:00:24,585 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_376, v_prenex_378], 6=[A, v_prenex_374]} [2021-06-12 22:00:24,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:24,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:24,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:24,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:24,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 7 [2021-06-12 22:00:24,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:24,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:24,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:24,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:24,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-12 22:00:24,601 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:24,706 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-06-12 22:00:24,706 INFO L628 ElimStorePlain]: treesize reduction 156, result has 44.9 percent of original size [2021-06-12 22:00:24,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:24,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:24,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 22:00:24,711 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:24,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:24,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:24,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:24,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:24,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 22:00:24,752 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:24,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:24,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:24,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:24,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:24,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:24,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 22:00:24,789 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:24,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:24,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:00:24,818 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:341, output treesize:41 [2021-06-12 22:00:24,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:00:24,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395684932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:00:24,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:00:24,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-12 22:00:24,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401986916] [2021-06-12 22:00:24,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:00:24,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:00:24,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:00:24,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:00:24,864 INFO L87 Difference]: Start difference. First operand 1906 states and 6460 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:25,971 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-06-12 22:00:26,104 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-06-12 22:00:26,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:00:26,224 INFO L93 Difference]: Finished difference Result 2358 states and 7788 transitions. [2021-06-12 22:00:26,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:00:26,225 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:00:26,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:00:26,228 INFO L225 Difference]: With dead ends: 2358 [2021-06-12 22:00:26,228 INFO L226 Difference]: Without dead ends: 2312 [2021-06-12 22:00:26,228 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1478.0ms TimeCoverageRelationStatistics Valid=252, Invalid=870, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:00:26,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2021-06-12 22:00:26,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 1906. [2021-06-12 22:00:26,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 3.3858267716535435) internal successors, (6450), 1905 states have internal predecessors, (6450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:26,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 6450 transitions. [2021-06-12 22:00:26,251 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 6450 transitions. Word has length 26 [2021-06-12 22:00:26,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:00:26,251 INFO L482 AbstractCegarLoop]: Abstraction has 1906 states and 6450 transitions. [2021-06-12 22:00:26,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:26,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 6450 transitions. [2021-06-12 22:00:26,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:00:26,253 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:00:26,253 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:00:26,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2988 [2021-06-12 22:00:26,454 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:00:26,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:00:26,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1833133118, now seen corresponding path program 57 times [2021-06-12 22:00:26,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:00:26,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716386450] [2021-06-12 22:00:26,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:00:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:00:26,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:00:26,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:00:26,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716386450] [2021-06-12 22:00:26,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716386450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:00:26,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40491129] [2021-06-12 22:00:26,811 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:00:26,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:00:26,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:00:26,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:00:26,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:00:27,241 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-12 22:00:27,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:27,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:27,534 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-12 22:00:27,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-06-12 22:00:27,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:27,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:27,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:27,566 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:00:27,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-06-12 22:00:27,568 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:27,964 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2021-06-12 22:00:27,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:27,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:27,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:28,002 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:00:28,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-06-12 22:00:28,006 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:28,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:28,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:28,032 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-12 22:00:28,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-06-12 22:00:28,033 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:28,389 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-06-12 22:00:28,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:28,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:28,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:28,426 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 22:00:28,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-06-12 22:00:28,430 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:28,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:28,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:28,467 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-12 22:00:28,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-06-12 22:00:28,473 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:28,810 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-06-12 22:00:28,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:28,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:28,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:28,842 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-12 22:00:28,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-06-12 22:00:28,844 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:28,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:28,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:28,870 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:28,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-12 22:00:28,877 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:29,191 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-12 22:00:29,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:29,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:29,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:29,228 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:00:29,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 35 [2021-06-12 22:00:29,229 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:29,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:29,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:29,257 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:29,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-06-12 22:00:29,262 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:29,831 WARN L205 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 122 [2021-06-12 22:00:29,832 INFO L628 ElimStorePlain]: treesize reduction 33, result has 94.4 percent of original size [2021-06-12 22:00:29,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:29,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:29,863 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:00:29,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-06-12 22:00:29,867 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:29,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:29,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:29,881 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:00:29,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-12 22:00:29,882 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:30,129 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-12 22:00:30,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:30,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:30,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:30,161 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:00:30,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-06-12 22:00:30,164 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:30,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:30,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:30,185 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-12 22:00:30,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 28 [2021-06-12 22:00:30,187 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:30,411 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-12 22:00:30,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:30,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:30,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:30,443 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:00:30,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-06-12 22:00:30,448 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:30,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:30,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:30,462 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:00:30,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-12 22:00:30,463 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:30,646 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-12 22:00:30,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:30,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-12 22:00:30,664 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:801, output treesize:340 [2021-06-12 22:00:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:00:30,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40491129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:00:30,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:00:30,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:00:30,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651741455] [2021-06-12 22:00:30,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:00:30,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:00:30,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:00:30,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:00:30,829 INFO L87 Difference]: Start difference. First operand 1906 states and 6450 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:31,905 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-12 22:00:32,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:00:32,209 INFO L93 Difference]: Finished difference Result 2168 states and 7234 transitions. [2021-06-12 22:00:32,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:00:32,210 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:00:32,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:00:32,213 INFO L225 Difference]: With dead ends: 2168 [2021-06-12 22:00:32,213 INFO L226 Difference]: Without dead ends: 2153 [2021-06-12 22:00:32,213 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1641.8ms TimeCoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:00:32,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2153 states. [2021-06-12 22:00:32,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2153 to 1921. [2021-06-12 22:00:32,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 3.3921875) internal successors, (6513), 1920 states have internal predecessors, (6513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:32,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 6513 transitions. [2021-06-12 22:00:32,235 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 6513 transitions. Word has length 26 [2021-06-12 22:00:32,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:00:32,235 INFO L482 AbstractCegarLoop]: Abstraction has 1921 states and 6513 transitions. [2021-06-12 22:00:32,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:32,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 6513 transitions. [2021-06-12 22:00:32,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:00:32,238 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:00:32,238 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:00:32,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3002,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:00:32,460 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:00:32,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:00:32,460 INFO L82 PathProgramCache]: Analyzing trace with hash 179857598, now seen corresponding path program 49 times [2021-06-12 22:00:32,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:00:32,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437997046] [2021-06-12 22:00:32,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:00:32,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:00:32,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:00:32,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:00:32,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437997046] [2021-06-12 22:00:32,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437997046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:00:32,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563922568] [2021-06-12 22:00:32,885 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:00:32,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:00:32,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:00:32,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:00:33,207 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-06-12 22:00:33,391 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-12 22:00:33,753 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 56 [2021-06-12 22:00:33,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:33,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:33,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:33,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:00:33,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:33,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:33,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:33,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:00:33,813 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:33,942 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-06-12 22:00:33,942 INFO L628 ElimStorePlain]: treesize reduction 44, result has 75.1 percent of original size [2021-06-12 22:00:33,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:33,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:00:33,959 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:34,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:34,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:34,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:34,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:34,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:00:34,040 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:34,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:34,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:34,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:00:34,047 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:34,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:34,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:00:34,110 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 9 variables, input treesize:215, output treesize:51 [2021-06-12 22:00:34,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:00:34,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563922568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:00:34,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:00:34,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:00:34,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18403710] [2021-06-12 22:00:34,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:00:34,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:00:34,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:00:34,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:00:34,207 INFO L87 Difference]: Start difference. First operand 1921 states and 6513 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:00:34,916 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-06-12 22:00:35,573 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 73 [2021-06-12 22:00:36,032 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 75 [2021-06-12 22:00:36,570 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 87 [2021-06-12 22:00:37,057 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 92 [2021-06-12 22:00:37,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:00:37,291 INFO L93 Difference]: Finished difference Result 2468 states and 8139 transitions. [2021-06-12 22:00:37,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:00:37,291 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-06-12 22:00:37,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:00:37,294 INFO L225 Difference]: With dead ends: 2468 [2021-06-12 22:00:37,295 INFO L226 Difference]: Without dead ends: 2453 [2021-06-12 22:00:37,295 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 3596.9ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:00:37,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2021-06-12 22:00:37,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 1932. [2021-06-12 22:00:37,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 3.392542723977214) internal successors, (6551), 1931 states have internal predecessors, (6551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:37,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 6551 transitions. [2021-06-12 22:00:37,321 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 6551 transitions. Word has length 26 [2021-06-12 22:00:37,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:00:37,321 INFO L482 AbstractCegarLoop]: Abstraction has 1932 states and 6551 transitions. [2021-06-12 22:00:37,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:00:37,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 6551 transitions. [2021-06-12 22:00:37,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:00:37,324 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:00:37,324 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:00:37,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3067 [2021-06-12 22:00:37,524 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:00:37,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:00:37,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1730239162, now seen corresponding path program 58 times [2021-06-12 22:00:37,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:00:37,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911804148] [2021-06-12 22:00:37,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:00:37,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:00:37,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:00:37,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:00:37,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911804148] [2021-06-12 22:00:37,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911804148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:00:37,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431165726] [2021-06-12 22:00:37,807 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:00:37,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:00:37,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:00:37,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:00:37,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:00:38,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:38,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-12 22:00:38,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:38,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:38,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:00:38,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:38,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:38,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-12 22:00:38,401 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:38,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:38,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-12 22:00:38,409 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:38,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:38,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:00:38,417 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:38,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:38,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:00:38,425 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:38,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:38,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-12 22:00:38,433 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:38,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:38,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-12 22:00:38,441 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:38,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:38,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-12 22:00:38,449 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:38,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:38,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:00:38,456 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:38,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:38,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-12 22:00:38,464 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:38,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:38,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:00:38,472 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:38,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:38,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-12 22:00:38,479 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:38,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:38,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-12 22:00:38,486 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:38,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:38,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:38,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:00:38,491 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:38,516 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-06-12 22:00:38,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:00:38,517 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-12 22:00:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:00:38,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431165726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:00:38,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:00:38,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 22:00:38,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077453334] [2021-06-12 22:00:38,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:00:38,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:00:38,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:00:38,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:00:38,534 INFO L87 Difference]: Start difference. First operand 1932 states and 6551 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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) [2021-06-12 22:00:38,910 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-06-12 22:00:39,160 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-06-12 22:00:39,397 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-06-12 22:00:39,716 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-06-12 22:00:40,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:00:40,014 INFO L93 Difference]: Finished difference Result 2505 states and 8099 transitions. [2021-06-12 22:00:40,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:00:40,015 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 26 [2021-06-12 22:00:40,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:00:40,018 INFO L225 Difference]: With dead ends: 2505 [2021-06-12 22:00:40,018 INFO L226 Difference]: Without dead ends: 2483 [2021-06-12 22:00:40,019 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1555.0ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:00:40,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2483 states. [2021-06-12 22:00:40,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2483 to 1948. [2021-06-12 22:00:40,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1947 states have (on average 3.3954802259887007) internal successors, (6611), 1947 states have internal predecessors, (6611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:40,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 6611 transitions. [2021-06-12 22:00:40,047 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 6611 transitions. Word has length 26 [2021-06-12 22:00:40,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:00:40,047 INFO L482 AbstractCegarLoop]: Abstraction has 1948 states and 6611 transitions. [2021-06-12 22:00:40,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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) [2021-06-12 22:00:40,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 6611 transitions. [2021-06-12 22:00:40,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:00:40,050 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:00:40,050 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:00:40,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3079,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:00:40,270 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:00:40,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:00:40,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1769727974, now seen corresponding path program 50 times [2021-06-12 22:00:40,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:00:40,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363597147] [2021-06-12 22:00:40,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:00:40,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:00:40,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:00:40,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:00:40,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363597147] [2021-06-12 22:00:40,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363597147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:00:40,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50597521] [2021-06-12 22:00:40,656 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:00:40,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:00:40,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:00:40,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:00:40,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:00:41,203 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-12 22:00:41,512 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-12 22:00:41,661 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_421, v_prenex_422, v_prenex_425], 6=[v_prenex_426, A, v_prenex_420, v_prenex_423, v_prenex_424]} [2021-06-12 22:00:41,695 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:41,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 22:00:41,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:42,146 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 136 [2021-06-12 22:00:42,147 INFO L628 ElimStorePlain]: treesize reduction 307, result has 56.1 percent of original size [2021-06-12 22:00:42,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:42,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 22:00:42,168 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:42,329 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-12 22:00:42,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:42,353 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:00:42,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-12 22:00:42,354 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:42,512 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-12 22:00:42,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:42,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:42,532 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:42,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2021-06-12 22:00:42,537 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:42,685 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-12 22:00:42,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:42,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:42,707 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-12 22:00:42,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-06-12 22:00:42,711 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:42,853 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-12 22:00:42,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:42,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:42,873 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-12 22:00:42,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 23 [2021-06-12 22:00:42,875 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:43,017 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-12 22:00:43,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:43,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:43,039 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-12 22:00:43,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 30 [2021-06-12 22:00:43,043 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:43,178 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-12 22:00:43,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:43,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:43,197 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-12 22:00:43,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-06-12 22:00:43,199 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:43,331 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-12 22:00:43,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:43,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:00:43,345 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:706, output treesize:429 [2021-06-12 22:00:43,603 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-06-12 22:00:43,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:00:43,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50597521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:00:43,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:00:43,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-12 22:00:43,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744193517] [2021-06-12 22:00:43,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:00:43,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:00:43,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:00:43,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:00:43,724 INFO L87 Difference]: Start difference. First operand 1948 states and 6611 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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) [2021-06-12 22:00:44,271 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-06-12 22:00:44,644 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 63 [2021-06-12 22:00:45,190 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2021-06-12 22:00:45,464 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-06-12 22:00:46,199 WARN L205 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 96 [2021-06-12 22:00:47,027 WARN L205 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 95 [2021-06-12 22:00:47,876 WARN L205 SmtUtils]: Spent 794.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 95 [2021-06-12 22:00:48,458 WARN L205 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 105 [2021-06-12 22:00:49,414 WARN L205 SmtUtils]: Spent 818.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 111 [2021-06-12 22:00:50,034 WARN L205 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 84 [2021-06-12 22:00:50,752 WARN L205 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 101 [2021-06-12 22:00:50,998 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-06-12 22:00:51,212 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 33 [2021-06-12 22:00:51,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:00:51,482 INFO L93 Difference]: Finished difference Result 2657 states and 8685 transitions. [2021-06-12 22:00:51,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:00:51,482 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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 26 [2021-06-12 22:00:51,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:00:51,486 INFO L225 Difference]: With dead ends: 2657 [2021-06-12 22:00:51,486 INFO L226 Difference]: Without dead ends: 2642 [2021-06-12 22:00:51,486 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 7936.8ms TimeCoverageRelationStatistics Valid=257, Invalid=1303, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 22:00:51,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-06-12 22:00:51,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 1952. [2021-06-12 22:00:51,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1952 states, 1951 states have (on average 3.3956945156330085) internal successors, (6625), 1951 states have internal predecessors, (6625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:51,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1952 states to 1952 states and 6625 transitions. [2021-06-12 22:00:51,511 INFO L78 Accepts]: Start accepts. Automaton has 1952 states and 6625 transitions. Word has length 26 [2021-06-12 22:00:51,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:00:51,511 INFO L482 AbstractCegarLoop]: Abstraction has 1952 states and 6625 transitions. [2021-06-12 22:00:51,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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) [2021-06-12 22:00:51,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1952 states and 6625 transitions. [2021-06-12 22:00:51,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:00:51,513 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:00:51,513 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:00:51,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3193,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:00:51,715 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:00:51,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:00:51,715 INFO L82 PathProgramCache]: Analyzing trace with hash 152195194, now seen corresponding path program 51 times [2021-06-12 22:00:51,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:00:51,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193363218] [2021-06-12 22:00:51,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:00:51,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:00:52,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:00:52,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:00:52,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193363218] [2021-06-12 22:00:52,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193363218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:00:52,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908671080] [2021-06-12 22:00:52,060 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:00:52,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:00:52,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:00:52,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:00:52,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:00:52,410 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-12 22:00:52,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:52,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:52,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:00:52,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:52,584 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-12 22:00:52,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:52,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:52,597 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:00:52,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 22:00:52,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:52,706 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-12 22:00:52,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:52,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:52,718 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:52,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:00:52,722 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:52,823 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-12 22:00:52,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:52,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:52,835 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:00:52,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:00:52,837 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:52,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:52,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:52,949 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:52,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:00:52,950 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:53,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:53,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:53,060 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:53,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:00:53,063 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:53,167 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-12 22:00:53,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:53,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:53,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:53,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:00:53,179 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:53,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:53,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:53,284 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:00:53,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:00:53,286 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:53,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:53,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:00:53,382 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-06-12 22:00:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:00:53,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908671080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:00:53,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:00:53,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:00:53,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617148467] [2021-06-12 22:00:53,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:00:53,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:00:53,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:00:53,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:00:53,566 INFO L87 Difference]: Start difference. First operand 1952 states and 6625 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:00:54,634 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-06-12 22:00:54,926 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-06-12 22:00:55,058 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-06-12 22:00:55,393 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-06-12 22:00:55,642 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2021-06-12 22:00:55,842 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-06-12 22:00:56,030 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-06-12 22:00:56,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:00:56,126 INFO L93 Difference]: Finished difference Result 2972 states and 9683 transitions. [2021-06-12 22:00:56,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:00:56,126 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-06-12 22:00:56,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:00:56,130 INFO L225 Difference]: With dead ends: 2972 [2021-06-12 22:00:56,130 INFO L226 Difference]: Without dead ends: 2942 [2021-06-12 22:00:56,130 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 2796.9ms TimeCoverageRelationStatistics Valid=309, Invalid=1023, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:00:56,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2021-06-12 22:00:56,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 1949. [2021-06-12 22:00:56,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1949 states, 1948 states have (on average 3.3983572895277208) internal successors, (6620), 1948 states have internal predecessors, (6620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:56,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1949 states to 1949 states and 6620 transitions. [2021-06-12 22:00:56,156 INFO L78 Accepts]: Start accepts. Automaton has 1949 states and 6620 transitions. Word has length 26 [2021-06-12 22:00:56,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:00:56,156 INFO L482 AbstractCegarLoop]: Abstraction has 1949 states and 6620 transitions. [2021-06-12 22:00:56,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:00:56,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1949 states and 6620 transitions. [2021-06-12 22:00:56,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:00:56,158 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:00:56,158 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:00:56,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3230 [2021-06-12 22:00:56,359 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:00:56,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:00:56,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1956232686, now seen corresponding path program 59 times [2021-06-12 22:00:56,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:00:56,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78065348] [2021-06-12 22:00:56,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:00:56,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:00:56,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:00:56,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:00:56,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78065348] [2021-06-12 22:00:56,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78065348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:00:56,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333111572] [2021-06-12 22:00:56,646 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:00:56,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:00:56,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:00:56,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:00:56,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:00:57,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:57,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:57,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-12 22:00:57,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:57,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:57,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:57,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-12 22:00:57,179 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:57,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:57,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:57,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-12 22:00:57,188 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:57,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:57,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:57,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:00:57,196 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:57,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:57,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:57,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-12 22:00:57,204 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:57,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:57,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:57,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-12 22:00:57,213 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:57,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:57,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:57,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:00:57,221 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:57,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:57,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:57,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:00:57,229 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:57,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:57,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:57,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:00:57,252 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:57,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:57,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:57,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-12 22:00:57,260 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:57,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:57,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:57,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:00:57,268 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:57,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:57,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:57,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-12 22:00:57,276 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:57,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:57,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:57,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-12 22:00:57,284 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:57,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:57,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:57,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:00:57,291 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:57,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:57,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:57,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:00:57,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-12 22:00:57,296 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:57,321 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-06-12 22:00:57,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:00:57,322 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-12 22:00:57,356 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:00:57,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333111572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:00:57,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:00:57,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:00:57,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280961880] [2021-06-12 22:00:57,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:00:57,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:00:57,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:00:57,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:00:57,357 INFO L87 Difference]: Start difference. First operand 1949 states and 6620 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-06-12 22:00:58,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:00:58,632 INFO L93 Difference]: Finished difference Result 3403 states and 10936 transitions. [2021-06-12 22:00:58,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:00:58,632 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 26 [2021-06-12 22:00:58,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:00:58,637 INFO L225 Difference]: With dead ends: 3403 [2021-06-12 22:00:58,637 INFO L226 Difference]: Without dead ends: 3373 [2021-06-12 22:00:58,637 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1340.3ms TimeCoverageRelationStatistics Valid=313, Invalid=1327, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:00:58,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3373 states. [2021-06-12 22:00:58,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3373 to 2041. [2021-06-12 22:00:58,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 3.4073529411764705) internal successors, (6951), 2040 states have internal predecessors, (6951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:00:58,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 6951 transitions. [2021-06-12 22:00:58,667 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 6951 transitions. Word has length 26 [2021-06-12 22:00:58,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:00:58,668 INFO L482 AbstractCegarLoop]: Abstraction has 2041 states and 6951 transitions. [2021-06-12 22:00:58,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-06-12 22:00:58,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 6951 transitions. [2021-06-12 22:00:58,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:00:58,670 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:00:58,670 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:00:58,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3245,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:00:58,870 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:00:58,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:00:58,871 INFO L82 PathProgramCache]: Analyzing trace with hash -505085958, now seen corresponding path program 60 times [2021-06-12 22:00:58,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:00:58,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590045848] [2021-06-12 22:00:58,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:00:58,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:00:59,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:00:59,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:00:59,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590045848] [2021-06-12 22:00:59,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590045848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:00:59,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316678636] [2021-06-12 22:00:59,114 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:00:59,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:00:59,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:00:59,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:00:59,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:00:59,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:59,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:59,726 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-06-12 22:00:59,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 41 [2021-06-12 22:00:59,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:59,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:59,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:59,763 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:59,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 59 [2021-06-12 22:00:59,772 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:59,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:59,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:59,807 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-06-12 22:00:59,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 38 [2021-06-12 22:00:59,811 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:59,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:59,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:59,831 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-12 22:00:59,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 1 [2021-06-12 22:00:59,832 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:59,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:59,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:59,851 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-12 22:00:59,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 1 [2021-06-12 22:00:59,852 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:59,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:59,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:59,882 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-06-12 22:00:59,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 28 [2021-06-12 22:00:59,883 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:59,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:59,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:59,903 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-12 22:00:59,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 1 [2021-06-12 22:00:59,904 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:59,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:59,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:59,936 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:00:59,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-12 22:00:59,946 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:59,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:59,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:59,981 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-06-12 22:00:59,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 38 [2021-06-12 22:00:59,985 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:00:59,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:00:59,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:00,005 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-12 22:01:00,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 1 [2021-06-12 22:01:00,006 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:00,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:00,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:00,034 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-06-12 22:01:00,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 25 [2021-06-12 22:01:00,036 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:00,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:00,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:00,065 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-06-12 22:01:00,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 25 [2021-06-12 22:01:00,067 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:00,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:00,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:00,087 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-12 22:01:00,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 1 [2021-06-12 22:01:00,088 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:00,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:00,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:00,107 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-12 22:01:00,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 1 [2021-06-12 22:01:00,108 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:00,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:00,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:00,126 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-12 22:01:00,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 1 [2021-06-12 22:01:00,127 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:00,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:00,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:00,154 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-12 22:01:00,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 1 [2021-06-12 22:01:00,155 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:00,398 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 31 [2021-06-12 22:01:00,398 INFO L628 ElimStorePlain]: treesize reduction 193, result has 41.2 percent of original size [2021-06-12 22:01:00,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:01:00,402 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:953, output treesize:150 [2021-06-12 22:01:00,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:00,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316678636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:00,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:01:00,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-12 22:01:00,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646147113] [2021-06-12 22:01:00,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:01:00,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:01:00,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:01:00,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:01:00,675 INFO L87 Difference]: Start difference. First operand 2041 states and 6951 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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) [2021-06-12 22:01:01,993 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2021-06-12 22:01:02,400 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-06-12 22:01:02,681 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-06-12 22:01:03,018 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-06-12 22:01:03,190 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-06-12 22:01:03,510 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-06-12 22:01:03,677 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-06-12 22:01:03,880 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-06-12 22:01:04,014 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-06-12 22:01:04,260 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-06-12 22:01:04,417 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2021-06-12 22:01:04,597 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-12 22:01:05,042 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-06-12 22:01:05,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:01:05,217 INFO L93 Difference]: Finished difference Result 3293 states and 10339 transitions. [2021-06-12 22:01:05,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 22:01:05,217 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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 26 [2021-06-12 22:01:05,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:01:05,221 INFO L225 Difference]: With dead ends: 3293 [2021-06-12 22:01:05,222 INFO L226 Difference]: Without dead ends: 3220 [2021-06-12 22:01:05,222 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 4474.7ms TimeCoverageRelationStatistics Valid=647, Invalid=2893, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:01:05,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2021-06-12 22:01:05,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 2049. [2021-06-12 22:01:05,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 3.4072265625) internal successors, (6978), 2048 states have internal predecessors, (6978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:05,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 6978 transitions. [2021-06-12 22:01:05,252 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 6978 transitions. Word has length 26 [2021-06-12 22:01:05,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:01:05,252 INFO L482 AbstractCegarLoop]: Abstraction has 2049 states and 6978 transitions. [2021-06-12 22:01:05,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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) [2021-06-12 22:01:05,252 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 6978 transitions. [2021-06-12 22:01:05,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:01:05,254 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:01:05,254 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:01:05,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3341 [2021-06-12 22:01:05,457 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:01:05,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:01:05,457 INFO L82 PathProgramCache]: Analyzing trace with hash -272116042, now seen corresponding path program 52 times [2021-06-12 22:01:05,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:01:05,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029627306] [2021-06-12 22:01:05,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:01:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:01:05,681 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-06-12 22:01:05,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:05,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:01:05,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029627306] [2021-06-12 22:01:05,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029627306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:05,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852154359] [2021-06-12 22:01:05,863 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:01:05,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:01:05,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:01:05,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:01:05,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:01:06,285 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-12 22:01:06,415 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_460, v_prenex_455, v_prenex_457], 6=[A, v_prenex_450, v_prenex_453, v_prenex_444, v_prenex_446]} [2021-06-12 22:01:06,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:06,457 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:01:06,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-12 22:01:06,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:06,850 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 158 [2021-06-12 22:01:06,850 INFO L628 ElimStorePlain]: treesize reduction 283, result has 56.5 percent of original size [2021-06-12 22:01:06,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:06,878 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:01:06,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-06-12 22:01:06,879 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:07,041 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2021-06-12 22:01:07,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:07,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:07,062 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:07,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 22:01:07,066 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:07,361 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 149 [2021-06-12 22:01:07,362 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.4 percent of original size [2021-06-12 22:01:07,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:07,382 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:07,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 32 [2021-06-12 22:01:07,388 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:07,667 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 140 [2021-06-12 22:01:07,667 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.3 percent of original size [2021-06-12 22:01:07,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:07,689 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:01:07,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:01:07,691 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:07,825 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-06-12 22:01:07,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:07,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:07,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:07,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-12 22:01:07,849 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:07,975 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-12 22:01:07,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:07,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:07,999 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:01:07,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-12 22:01:08,003 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:08,125 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-06-12 22:01:08,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:08,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:08,146 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:01:08,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:01:08,147 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:08,291 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-06-12 22:01:08,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:08,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:01:08,309 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:658, output treesize:346 [2021-06-12 22:01:08,519 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-12 22:01:08,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:08,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852154359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:08,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:01:08,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:01:08,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402867579] [2021-06-12 22:01:08,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:01:08,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:01:08,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:01:08,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:01:08,634 INFO L87 Difference]: Start difference. First operand 2049 states and 6978 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:01:09,880 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2021-06-12 22:01:10,002 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-06-12 22:01:10,425 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-06-12 22:01:10,645 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-12 22:01:11,026 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2021-06-12 22:01:11,341 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 32 [2021-06-12 22:01:11,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:01:11,399 INFO L93 Difference]: Finished difference Result 2966 states and 9810 transitions. [2021-06-12 22:01:11,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:01:11,399 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-06-12 22:01:11,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:01:11,403 INFO L225 Difference]: With dead ends: 2966 [2021-06-12 22:01:11,403 INFO L226 Difference]: Without dead ends: 2951 [2021-06-12 22:01:11,403 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 3196.4ms TimeCoverageRelationStatistics Valid=291, Invalid=1041, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:01:11,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-06-12 22:01:11,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2061. [2021-06-12 22:01:11,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 2060 states have (on average 3.404368932038835) internal successors, (7013), 2060 states have internal predecessors, (7013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:11,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 7013 transitions. [2021-06-12 22:01:11,431 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 7013 transitions. Word has length 26 [2021-06-12 22:01:11,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:01:11,431 INFO L482 AbstractCegarLoop]: Abstraction has 2061 states and 7013 transitions. [2021-06-12 22:01:11,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:01:11,431 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 7013 transitions. [2021-06-12 22:01:11,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:01:11,433 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:01:11,433 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:01:11,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3479,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:01:11,634 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:01:11,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:01:11,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1962058946, now seen corresponding path program 53 times [2021-06-12 22:01:11,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:01:11,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804249558] [2021-06-12 22:01:11,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:01:11,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:01:11,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:11,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:01:11,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804249558] [2021-06-12 22:01:11,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804249558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:11,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510391291] [2021-06-12 22:01:11,995 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:01:12,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:01:12,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:01:12,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:01:12,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:01:12,526 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-06-12 22:01:12,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:12,630 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:12,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:01:12,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:12,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:12,645 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:01:12,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:01:12,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:12,774 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-12 22:01:12,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:12,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:12,787 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:12,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:01:12,788 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:12,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:12,798 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:12,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:01:12,800 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:12,921 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-12 22:01:12,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:12,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:12,933 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:12,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:01:12,935 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:12,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:12,944 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:01:12,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:01:12,946 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:13,056 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-06-12 22:01:13,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:13,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:13,068 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:01:13,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 22:01:13,070 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:13,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:13,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:13,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:01:13,082 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:13,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:13,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:01:13,185 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:341, output treesize:174 [2021-06-12 22:01:13,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:13,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510391291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:13,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:01:13,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:01:13,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840770069] [2021-06-12 22:01:13,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:01:13,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:01:13,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:01:13,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:01:13,388 INFO L87 Difference]: Start difference. First operand 2061 states and 7013 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:13,922 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-06-12 22:01:14,134 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-06-12 22:01:14,596 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-06-12 22:01:14,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:01:14,658 INFO L93 Difference]: Finished difference Result 2612 states and 8738 transitions. [2021-06-12 22:01:14,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:01:14,658 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:01:14,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:01:14,663 INFO L225 Difference]: With dead ends: 2612 [2021-06-12 22:01:14,663 INFO L226 Difference]: Without dead ends: 2587 [2021-06-12 22:01:14,663 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1790.4ms TimeCoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:01:14,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2021-06-12 22:01:14,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 2061. [2021-06-12 22:01:14,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 2060 states have (on average 3.404368932038835) internal successors, (7013), 2060 states have internal predecessors, (7013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:14,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 7013 transitions. [2021-06-12 22:01:14,702 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 7013 transitions. Word has length 26 [2021-06-12 22:01:14,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:01:14,702 INFO L482 AbstractCegarLoop]: Abstraction has 2061 states and 7013 transitions. [2021-06-12 22:01:14,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:14,702 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 7013 transitions. [2021-06-12 22:01:14,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:01:14,706 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:01:14,706 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:01:14,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3521,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:01:14,928 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:01:14,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:01:14,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1086187700, now seen corresponding path program 54 times [2021-06-12 22:01:14,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:01:14,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476710227] [2021-06-12 22:01:14,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:01:14,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:01:15,364 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-06-12 22:01:15,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:15,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:01:15,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476710227] [2021-06-12 22:01:15,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476710227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:15,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203265179] [2021-06-12 22:01:15,606 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:01:15,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:01:15,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:01:15,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:01:15,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:01:15,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:15,849 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:01:15,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:01:15,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:15,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:15,858 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:01:15,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:01:15,859 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:15,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:15,866 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:01:15,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:01:15,867 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:15,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:15,878 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:01:15,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:01:15,879 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:15,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:15,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:15,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:01:15,891 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:15,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:15,902 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:01:15,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:01:15,903 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:15,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:15,912 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:01:15,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:01:15,912 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:15,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:15,923 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:15,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:01:15,924 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:15,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:15,933 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:01:15,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 22:01:15,933 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:15,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:15,944 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:15,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:01:15,947 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:15,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:15,955 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:01:15,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 22:01:15,956 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:15,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:15,967 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:15,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:01:15,969 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:15,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:15,980 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:01:15,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 22:01:15,981 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:15,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:15,991 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:15,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:01:15,994 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:15,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:16,002 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:01:16,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:01:16,003 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:16,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:16,008 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:01:16,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:01:16,009 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:16,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:16,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:01:16,082 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-06-12 22:01:16,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:16,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203265179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:16,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:01:16,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:01:16,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058656036] [2021-06-12 22:01:16,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:01:16,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:01:16,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:01:16,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:01:16,268 INFO L87 Difference]: Start difference. First operand 2061 states and 7013 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:16,648 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-06-12 22:01:17,658 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-06-12 22:01:17,919 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-06-12 22:01:18,095 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-06-12 22:01:18,374 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-06-12 22:01:18,759 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-06-12 22:01:19,060 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2021-06-12 22:01:19,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:01:19,121 INFO L93 Difference]: Finished difference Result 2664 states and 8880 transitions. [2021-06-12 22:01:19,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:01:19,121 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:01:19,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:01:19,125 INFO L225 Difference]: With dead ends: 2664 [2021-06-12 22:01:19,125 INFO L226 Difference]: Without dead ends: 2649 [2021-06-12 22:01:19,126 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 3135.1ms TimeCoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 22:01:19,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2649 states. [2021-06-12 22:01:19,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2649 to 2049. [2021-06-12 22:01:19,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 3.4072265625) internal successors, (6978), 2048 states have internal predecessors, (6978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:19,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 6978 transitions. [2021-06-12 22:01:19,153 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 6978 transitions. Word has length 26 [2021-06-12 22:01:19,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:01:19,154 INFO L482 AbstractCegarLoop]: Abstraction has 2049 states and 6978 transitions. [2021-06-12 22:01:19,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:19,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 6978 transitions. [2021-06-12 22:01:19,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:01:19,156 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:01:19,156 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:01:19,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3555,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:01:19,357 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:01:19,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:01:19,357 INFO L82 PathProgramCache]: Analyzing trace with hash 935709652, now seen corresponding path program 61 times [2021-06-12 22:01:19,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:01:19,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820960073] [2021-06-12 22:01:19,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:01:19,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:01:19,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:19,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:01:19,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820960073] [2021-06-12 22:01:19,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820960073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:19,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035095300] [2021-06-12 22:01:19,723 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:01:19,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:01:19,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:01:19,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:01:20,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:20,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:01:20,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:20,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:20,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:01:20,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:20,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:20,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-12 22:01:20,231 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:20,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:20,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:01:20,238 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:20,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:20,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:01:20,246 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:20,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:20,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:01:20,253 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:20,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:20,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-12 22:01:20,260 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:20,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:20,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-12 22:01:20,268 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:20,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:20,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-12 22:01:20,275 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:20,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:20,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-12 22:01:20,283 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:20,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:20,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-12 22:01:20,290 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:20,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:20,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:01:20,297 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:20,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:20,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-12 22:01:20,304 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:20,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:20,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-12 22:01:20,311 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:20,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:20,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:20,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-12 22:01:20,315 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:20,340 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-06-12 22:01:20,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:01:20,341 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-12 22:01:20,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:20,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035095300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:20,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:01:20,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-12 22:01:20,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431340935] [2021-06-12 22:01:20,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:01:20,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:01:20,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:01:20,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:01:20,359 INFO L87 Difference]: Start difference. First operand 2049 states and 6978 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:22,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:01:22,747 INFO L93 Difference]: Finished difference Result 2625 states and 8625 transitions. [2021-06-12 22:01:22,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 22:01:22,747 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:01:22,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:01:22,751 INFO L225 Difference]: With dead ends: 2625 [2021-06-12 22:01:22,751 INFO L226 Difference]: Without dead ends: 2603 [2021-06-12 22:01:22,751 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 2367.3ms TimeCoverageRelationStatistics Valid=525, Invalid=2127, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 22:01:22,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2021-06-12 22:01:22,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 2047. [2021-06-12 22:01:22,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2047 states, 2046 states have (on average 3.40811339198436) internal successors, (6973), 2046 states have internal predecessors, (6973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:22,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2047 states to 2047 states and 6973 transitions. [2021-06-12 22:01:22,776 INFO L78 Accepts]: Start accepts. Automaton has 2047 states and 6973 transitions. Word has length 26 [2021-06-12 22:01:22,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:01:22,776 INFO L482 AbstractCegarLoop]: Abstraction has 2047 states and 6973 transitions. [2021-06-12 22:01:22,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:22,776 INFO L276 IsEmpty]: Start isEmpty. Operand 2047 states and 6973 transitions. [2021-06-12 22:01:22,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:01:22,779 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:01:22,779 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:01:22,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3572 [2021-06-12 22:01:22,979 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:01:22,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:01:22,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1861203518, now seen corresponding path program 62 times [2021-06-12 22:01:22,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:01:22,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138784488] [2021-06-12 22:01:22,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:01:22,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:01:23,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:23,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:01:23,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138784488] [2021-06-12 22:01:23,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138784488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:23,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454501442] [2021-06-12 22:01:23,293 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:01:23,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:01:23,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:01:23,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:01:23,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:01:23,617 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-06-12 22:01:23,666 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_470], 6=[v_prenex_472, v_prenex_474]} [2021-06-12 22:01:23,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:23,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:23,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:23,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 7 [2021-06-12 22:01:23,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:23,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:23,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:23,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-12 22:01:23,680 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:23,788 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-06-12 22:01:23,789 INFO L628 ElimStorePlain]: treesize reduction 162, result has 46.2 percent of original size [2021-06-12 22:01:23,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:23,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:23,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:23,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 22:01:23,795 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:23,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:23,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:23,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:23,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:23,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 22:01:23,836 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:23,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:23,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:23,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:23,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:23,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:23,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-12 22:01:23,875 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:23,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:23,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:01:23,906 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:365, output treesize:33 [2021-06-12 22:01:23,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:23,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454501442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:23,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:01:23,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 22:01:23,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039737334] [2021-06-12 22:01:23,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:01:23,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:01:23,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:01:23,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:01:23,953 INFO L87 Difference]: Start difference. First operand 2047 states and 6973 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-06-12 22:01:25,323 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-06-12 22:01:25,572 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-12 22:01:25,716 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-06-12 22:01:25,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:01:25,826 INFO L93 Difference]: Finished difference Result 2959 states and 9765 transitions. [2021-06-12 22:01:25,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:01:25,826 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 26 [2021-06-12 22:01:25,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:01:25,830 INFO L225 Difference]: With dead ends: 2959 [2021-06-12 22:01:25,830 INFO L226 Difference]: Without dead ends: 2919 [2021-06-12 22:01:25,830 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 2004.9ms TimeCoverageRelationStatistics Valid=405, Invalid=1317, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 22:01:25,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2021-06-12 22:01:25,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2063. [2021-06-12 22:01:25,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2063 states, 2062 states have (on average 3.41270611057226) internal successors, (7037), 2062 states have internal predecessors, (7037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:25,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2063 states to 2063 states and 7037 transitions. [2021-06-12 22:01:25,867 INFO L78 Accepts]: Start accepts. Automaton has 2063 states and 7037 transitions. Word has length 26 [2021-06-12 22:01:25,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:01:25,867 INFO L482 AbstractCegarLoop]: Abstraction has 2063 states and 7037 transitions. [2021-06-12 22:01:25,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-06-12 22:01:25,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2063 states and 7037 transitions. [2021-06-12 22:01:25,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:01:25,869 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:01:25,869 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:01:26,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3662,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:01:26,070 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:01:26,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:01:26,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1211067586, now seen corresponding path program 63 times [2021-06-12 22:01:26,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:01:26,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321183047] [2021-06-12 22:01:26,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:01:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:01:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:26,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:01:26,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321183047] [2021-06-12 22:01:26,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321183047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:26,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159504315] [2021-06-12 22:01:26,334 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:01:26,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:01:26,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:01:26,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:01:26,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:01:26,749 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-06-12 22:01:26,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:26,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:26,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:26,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 51 [2021-06-12 22:01:26,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:26,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:26,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:27,000 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-06-12 22:01:27,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 39 [2021-06-12 22:01:27,005 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:28,176 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 198 DAG size of output: 183 [2021-06-12 22:01:28,177 INFO L628 ElimStorePlain]: treesize reduction 42, result has 95.5 percent of original size [2021-06-12 22:01:28,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:28,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:28,237 INFO L354 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2021-06-12 22:01:28,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 43 [2021-06-12 22:01:28,240 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:28,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:28,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:28,297 INFO L354 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2021-06-12 22:01:28,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 47 [2021-06-12 22:01:28,303 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:29,488 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 188 DAG size of output: 183 [2021-06-12 22:01:29,489 INFO L628 ElimStorePlain]: treesize reduction 24, result has 97.4 percent of original size [2021-06-12 22:01:29,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:29,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:29,535 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-06-12 22:01:29,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 32 [2021-06-12 22:01:29,539 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:29,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:29,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:29,580 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-06-12 22:01:29,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 32 [2021-06-12 22:01:29,583 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:30,646 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 173 DAG size of output: 172 [2021-06-12 22:01:30,647 INFO L628 ElimStorePlain]: treesize reduction 44, result has 94.9 percent of original size [2021-06-12 22:01:30,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:30,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:30,692 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-06-12 22:01:30,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 28 [2021-06-12 22:01:30,694 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:30,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:30,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:30,733 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-06-12 22:01:30,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 31 [2021-06-12 22:01:30,735 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:31,241 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-12 22:01:31,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:31,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:31,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:31,290 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-06-12 22:01:31,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 39 [2021-06-12 22:01:31,295 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:31,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:31,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:31,336 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-06-12 22:01:31,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 36 [2021-06-12 22:01:31,341 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:32,257 WARN L205 SmtUtils]: Spent 915.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 152 [2021-06-12 22:01:32,257 INFO L628 ElimStorePlain]: treesize reduction 18, result has 97.7 percent of original size [2021-06-12 22:01:32,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:32,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:32,310 INFO L354 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2021-06-12 22:01:32,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 44 [2021-06-12 22:01:32,317 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:32,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:32,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:32,350 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:32,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 45 [2021-06-12 22:01:32,360 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:32,801 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-06-12 22:01:32,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:32,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:32,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:32,854 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-06-12 22:01:32,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 22:01:32,857 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:32,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:32,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:32,893 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-06-12 22:01:32,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 22:01:32,895 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:33,699 WARN L205 SmtUtils]: Spent 803.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 135 [2021-06-12 22:01:33,699 INFO L628 ElimStorePlain]: treesize reduction 11, result has 98.4 percent of original size [2021-06-12 22:01:33,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:33,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:33,746 INFO L354 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2021-06-12 22:01:33,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 31 treesize of output 43 [2021-06-12 22:01:33,750 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:33,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:33,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:33,791 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-06-12 22:01:33,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 36 [2021-06-12 22:01:33,795 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:34,180 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-12 22:01:34,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:34,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-06-12 22:01:34,226 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 24 variables, input treesize:945, output treesize:1467 [2021-06-12 22:01:34,700 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 49 [2021-06-12 22:01:34,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:34,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159504315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:34,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:01:34,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 22:01:34,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993887591] [2021-06-12 22:01:34,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:01:34,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:01:34,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:01:34,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:01:34,813 INFO L87 Difference]: Start difference. First operand 2063 states and 7037 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:35,450 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 31 [2021-06-12 22:01:35,707 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 37 [2021-06-12 22:01:36,128 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 39 [2021-06-12 22:01:36,631 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-06-12 22:01:36,797 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 34 [2021-06-12 22:01:37,129 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2021-06-12 22:01:37,587 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-06-12 22:01:37,814 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-06-12 22:01:38,010 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 30 [2021-06-12 22:01:38,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:01:38,094 INFO L93 Difference]: Finished difference Result 2842 states and 9205 transitions. [2021-06-12 22:01:38,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:01:38,094 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:01:38,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:01:38,098 INFO L225 Difference]: With dead ends: 2842 [2021-06-12 22:01:38,099 INFO L226 Difference]: Without dead ends: 2798 [2021-06-12 22:01:38,099 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 3762.8ms TimeCoverageRelationStatistics Valid=456, Invalid=1524, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 22:01:38,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2021-06-12 22:01:38,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 2136. [2021-06-12 22:01:38,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2135 states have (on average 3.406088992974239) internal successors, (7272), 2135 states have internal predecessors, (7272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:38,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 7272 transitions. [2021-06-12 22:01:38,127 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 7272 transitions. Word has length 26 [2021-06-12 22:01:38,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:01:38,128 INFO L482 AbstractCegarLoop]: Abstraction has 2136 states and 7272 transitions. [2021-06-12 22:01:38,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:38,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 7272 transitions. [2021-06-12 22:01:38,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:01:38,130 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:01:38,130 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:01:38,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3676,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:01:38,331 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:01:38,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:01:38,331 INFO L82 PathProgramCache]: Analyzing trace with hash -550813574, now seen corresponding path program 55 times [2021-06-12 22:01:38,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:01:38,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552022618] [2021-06-12 22:01:38,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:01:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:01:38,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:38,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:01:38,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552022618] [2021-06-12 22:01:38,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552022618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:38,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684988562] [2021-06-12 22:01:38,662 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:01:38,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:01:38,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:01:38,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:01:39,182 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-12 22:01:39,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:39,301 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:01:39,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 22:01:39,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:39,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:39,325 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:39,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 22:01:39,331 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:39,679 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 147 [2021-06-12 22:01:39,680 INFO L628 ElimStorePlain]: treesize reduction 194, result has 64.3 percent of original size [2021-06-12 22:01:39,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:39,706 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:01:39,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-06-12 22:01:39,707 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:39,849 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-06-12 22:01:39,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:39,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:39,872 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:01:39,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:01:39,874 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:40,004 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-06-12 22:01:40,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:40,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:40,029 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:01:40,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-12 22:01:40,030 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:40,160 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-06-12 22:01:40,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:40,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:40,184 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:01:40,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-12 22:01:40,188 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:40,331 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-06-12 22:01:40,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:40,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:40,352 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:01:40,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:01:40,353 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:40,478 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-06-12 22:01:40,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:40,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:40,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:40,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-12 22:01:40,502 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:40,745 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 120 [2021-06-12 22:01:40,745 INFO L628 ElimStorePlain]: treesize reduction 12, result has 95.8 percent of original size [2021-06-12 22:01:40,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:40,763 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:40,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-12 22:01:40,767 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:41,019 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 114 [2021-06-12 22:01:41,019 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.0 percent of original size [2021-06-12 22:01:41,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:01:41,051 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 24 variables, input treesize:583, output treesize:253 [2021-06-12 22:01:41,250 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-06-12 22:01:41,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:41,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684988562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:41,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:01:41,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:01:41,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113170523] [2021-06-12 22:01:41,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:01:41,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:01:41,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:01:41,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:01:41,348 INFO L87 Difference]: Start difference. First operand 2136 states and 7272 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:01:42,481 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2021-06-12 22:01:42,703 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-12 22:01:42,912 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-12 22:01:43,319 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2021-06-12 22:01:43,666 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-06-12 22:01:43,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:01:43,741 INFO L93 Difference]: Finished difference Result 3051 states and 10102 transitions. [2021-06-12 22:01:43,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:01:43,742 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-06-12 22:01:43,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:01:43,746 INFO L225 Difference]: With dead ends: 3051 [2021-06-12 22:01:43,746 INFO L226 Difference]: Without dead ends: 3036 [2021-06-12 22:01:43,746 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 2818.2ms TimeCoverageRelationStatistics Valid=244, Invalid=878, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:01:43,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3036 states. [2021-06-12 22:01:43,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3036 to 2138. [2021-06-12 22:01:43,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2138 states, 2137 states have (on average 3.402433317735143) internal successors, (7271), 2137 states have internal predecessors, (7271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:43,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 7271 transitions. [2021-06-12 22:01:43,774 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 7271 transitions. Word has length 26 [2021-06-12 22:01:43,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:01:43,774 INFO L482 AbstractCegarLoop]: Abstraction has 2138 states and 7271 transitions. [2021-06-12 22:01:43,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:01:43,775 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 7271 transitions. [2021-06-12 22:01:43,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:01:43,777 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:01:43,777 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:01:43,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3761,119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:01:43,977 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:01:43,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:01:43,978 INFO L82 PathProgramCache]: Analyzing trace with hash 2054210818, now seen corresponding path program 56 times [2021-06-12 22:01:43,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:01:43,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943198008] [2021-06-12 22:01:43,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:01:43,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:01:44,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:44,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:01:44,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943198008] [2021-06-12 22:01:44,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943198008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:44,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085229708] [2021-06-12 22:01:44,392 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:01:44,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:01:44,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:01:44,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:01:44,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:01:44,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:44,610 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:01:44,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:01:44,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:44,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:44,618 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:01:44,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:01:44,619 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:44,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:44,627 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:01:44,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:01:44,628 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:44,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:44,638 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:01:44,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:01:44,640 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:44,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:44,651 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:44,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:01:44,652 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:44,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:44,663 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:01:44,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:01:44,664 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:44,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:44,672 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:01:44,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:01:44,673 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:44,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:44,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:44,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:01:44,685 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:44,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:44,693 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:01:44,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 22:01:44,694 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:44,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:44,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:44,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:01:44,709 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:44,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:44,718 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:01:44,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 22:01:44,718 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:44,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:44,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:44,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:01:44,732 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:44,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:44,743 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:01:44,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 22:01:44,744 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:44,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:44,754 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:44,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:01:44,757 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:44,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:44,765 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:01:44,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:01:44,766 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:44,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:44,771 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:01:44,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:01:44,772 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:44,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:44,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:01:44,846 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-06-12 22:01:45,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:45,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085229708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:45,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:01:45,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:01:45,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060407105] [2021-06-12 22:01:45,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:01:45,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:01:45,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:01:45,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:01:45,063 INFO L87 Difference]: Start difference. First operand 2138 states and 7271 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:45,355 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-06-12 22:01:46,188 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-12 22:01:46,366 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-06-12 22:01:46,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:01:46,448 INFO L93 Difference]: Finished difference Result 2900 states and 9631 transitions. [2021-06-12 22:01:46,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:01:46,448 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:01:46,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:01:46,452 INFO L225 Difference]: With dead ends: 2900 [2021-06-12 22:01:46,452 INFO L226 Difference]: Without dead ends: 2875 [2021-06-12 22:01:46,452 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1624.2ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:01:46,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2021-06-12 22:01:46,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 2131. [2021-06-12 22:01:46,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2131 states, 2130 states have (on average 3.3995305164319247) internal successors, (7241), 2130 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:46,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2131 states to 2131 states and 7241 transitions. [2021-06-12 22:01:46,478 INFO L78 Accepts]: Start accepts. Automaton has 2131 states and 7241 transitions. Word has length 26 [2021-06-12 22:01:46,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:01:46,478 INFO L482 AbstractCegarLoop]: Abstraction has 2131 states and 7241 transitions. [2021-06-12 22:01:46,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:46,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2131 states and 7241 transitions. [2021-06-12 22:01:46,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:01:46,480 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:01:46,481 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:01:46,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3802,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:01:46,682 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:01:46,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:01:46,682 INFO L82 PathProgramCache]: Analyzing trace with hash 807490168, now seen corresponding path program 57 times [2021-06-12 22:01:46,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:01:46,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412581608] [2021-06-12 22:01:46,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:01:46,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:01:47,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:47,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:01:47,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412581608] [2021-06-12 22:01:47,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412581608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:47,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580386348] [2021-06-12 22:01:47,057 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:01:47,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:01:47,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:01:47,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:01:47,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:01:47,569 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-12 22:01:47,904 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 68 [2021-06-12 22:01:48,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:48,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:48,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:48,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:01:48,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:48,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:48,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:48,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-12 22:01:48,050 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:48,227 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-06-12 22:01:48,227 INFO L628 ElimStorePlain]: treesize reduction 143, result has 51.5 percent of original size [2021-06-12 22:01:48,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:48,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:01:48,233 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:48,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:48,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:48,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:48,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:48,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:48,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:01:48,307 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:48,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:48,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:48,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:48,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:01:48,313 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:48,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:48,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:48,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:01:48,369 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:48,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:48,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:01:48,420 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:333, output treesize:51 [2021-06-12 22:01:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:48,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580386348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:48,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:01:48,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:01:48,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213543285] [2021-06-12 22:01:48,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:01:48,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:01:48,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:01:48,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:01:48,475 INFO L87 Difference]: Start difference. First operand 2131 states and 7241 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:01:49,248 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-06-12 22:01:49,621 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-12 22:01:50,047 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 83 [2021-06-12 22:01:50,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:01:50,167 INFO L93 Difference]: Finished difference Result 2671 states and 8927 transitions. [2021-06-12 22:01:50,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:01:50,167 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-06-12 22:01:50,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:01:50,171 INFO L225 Difference]: With dead ends: 2671 [2021-06-12 22:01:50,171 INFO L226 Difference]: Without dead ends: 2656 [2021-06-12 22:01:50,171 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 2209.1ms TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:01:50,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2021-06-12 22:01:50,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2119. [2021-06-12 22:01:50,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 3.4022662889518416) internal successors, (7206), 2118 states have internal predecessors, (7206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:50,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 7206 transitions. [2021-06-12 22:01:50,195 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 7206 transitions. Word has length 26 [2021-06-12 22:01:50,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:01:50,196 INFO L482 AbstractCegarLoop]: Abstraction has 2119 states and 7206 transitions. [2021-06-12 22:01:50,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:01:50,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 7206 transitions. [2021-06-12 22:01:50,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:01:50,198 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:01:50,198 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:01:50,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3819 [2021-06-12 22:01:50,399 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:01:50,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:01:50,399 INFO L82 PathProgramCache]: Analyzing trace with hash 243784254, now seen corresponding path program 58 times [2021-06-12 22:01:50,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:01:50,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75832156] [2021-06-12 22:01:50,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:01:50,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:01:50,599 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2021-06-12 22:01:50,737 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2021-06-12 22:01:50,930 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-06-12 22:01:51,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:51,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:01:51,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75832156] [2021-06-12 22:01:51,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75832156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:51,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202788648] [2021-06-12 22:01:51,046 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:01:51,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:01:51,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:01:51,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:01:51,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:01:51,427 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-06-12 22:01:51,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:51,544 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:01:51,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-12 22:01:51,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:51,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:51,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:51,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-12 22:01:51,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:51,688 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-12 22:01:51,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:51,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:51,702 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:01:51,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:01:51,703 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:51,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:51,713 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:51,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:01:51,716 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:51,831 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-12 22:01:51,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:51,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:51,844 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:01:51,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-12 22:01:51,846 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:51,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:51,855 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:51,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:01:51,857 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:51,965 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-06-12 22:01:51,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:51,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:51,978 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:51,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:01:51,979 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:51,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:51,988 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:51,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-12 22:01:51,990 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:52,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:01:52,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:01:52,093 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:333, output treesize:174 [2021-06-12 22:01:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:52,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202788648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:52,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:01:52,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:01:52,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335858842] [2021-06-12 22:01:52,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:01:52,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:01:52,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:01:52,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:01:52,293 INFO L87 Difference]: Start difference. First operand 2119 states and 7206 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:01:53,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:01:53,358 INFO L93 Difference]: Finished difference Result 2740 states and 9175 transitions. [2021-06-12 22:01:53,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:01:53,358 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-06-12 22:01:53,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:01:53,362 INFO L225 Difference]: With dead ends: 2740 [2021-06-12 22:01:53,362 INFO L226 Difference]: Without dead ends: 2725 [2021-06-12 22:01:53,362 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1651.5ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:01:53,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2021-06-12 22:01:53,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 2113. [2021-06-12 22:01:53,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 3.403409090909091) internal successors, (7188), 2112 states have internal predecessors, (7188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:53,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 7188 transitions. [2021-06-12 22:01:53,389 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 7188 transitions. Word has length 26 [2021-06-12 22:01:53,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:01:53,389 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 7188 transitions. [2021-06-12 22:01:53,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-06-12 22:01:53,389 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 7188 transitions. [2021-06-12 22:01:53,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:01:53,391 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:01:53,391 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:01:53,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3838 [2021-06-12 22:01:53,592 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:01:53,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:01:53,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1128807410, now seen corresponding path program 64 times [2021-06-12 22:01:53,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:01:53,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342695178] [2021-06-12 22:01:53,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:01:53,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:01:53,928 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:53,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:01:53,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342695178] [2021-06-12 22:01:53,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342695178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:53,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317345764] [2021-06-12 22:01:53,928 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:01:53,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:01:53,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:01:53,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:01:53,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:01:54,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:54,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:01:54,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:54,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:54,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-12 22:01:54,395 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:54,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:54,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-12 22:01:54,403 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:54,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:54,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-12 22:01:54,410 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:54,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:54,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-12 22:01:54,418 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:54,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:54,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-12 22:01:54,425 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:54,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:54,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-12 22:01:54,433 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:54,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:54,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:01:54,440 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:54,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:54,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-12 22:01:54,447 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:54,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:54,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 22:01:54,454 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:54,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:54,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-12 22:01:54,461 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:54,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:54,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-12 22:01:54,469 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:54,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:54,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:01:54,476 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:54,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:54,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:01:54,483 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:54,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:01:54,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:01:54,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-12 22:01:54,487 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:01:54,513 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-06-12 22:01:54,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:01:54,514 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-12 22:01:54,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:54,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317345764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:54,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:01:54,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 22:01:54,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582649065] [2021-06-12 22:01:54,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:01:54,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:01:54,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:01:54,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:01:54,551 INFO L87 Difference]: Start difference. First operand 2113 states and 7188 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-06-12 22:01:56,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:01:56,001 INFO L93 Difference]: Finished difference Result 2992 states and 9892 transitions. [2021-06-12 22:01:56,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:01:56,001 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 26 [2021-06-12 22:01:56,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:01:56,005 INFO L225 Difference]: With dead ends: 2992 [2021-06-12 22:01:56,005 INFO L226 Difference]: Without dead ends: 2955 [2021-06-12 22:01:56,005 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1506.5ms TimeCoverageRelationStatistics Valid=344, Invalid=1296, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:01:56,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2021-06-12 22:01:56,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2104. [2021-06-12 22:01:56,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 2103 states have (on average 3.4013314312886354) internal successors, (7153), 2103 states have internal predecessors, (7153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:56,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 7153 transitions. [2021-06-12 22:01:56,033 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 7153 transitions. Word has length 26 [2021-06-12 22:01:56,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:01:56,034 INFO L482 AbstractCegarLoop]: Abstraction has 2104 states and 7153 transitions. [2021-06-12 22:01:56,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-06-12 22:01:56,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 7153 transitions. [2021-06-12 22:01:56,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:01:56,036 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:01:56,036 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:01:56,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3871,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:01:56,236 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:01:56,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:01:56,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1868598568, now seen corresponding path program 59 times [2021-06-12 22:01:56,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:01:56,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784842831] [2021-06-12 22:01:56,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:01:56,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:01:56,278 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:56,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:01:56,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784842831] [2021-06-12 22:01:56,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784842831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:56,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871173262] [2021-06-12 22:01:56,279 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:01:56,305 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:01:56,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:01:56,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:01:56,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:01:56,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:56,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871173262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:56,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:01:56,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:01:56,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118558267] [2021-06-12 22:01:56,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:01:56,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:01:56,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:01:56,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:01:56,403 INFO L87 Difference]: Start difference. First operand 2104 states and 7153 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2021-06-12 22:01:57,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:01:57,331 INFO L93 Difference]: Finished difference Result 5069 states and 15729 transitions. [2021-06-12 22:01:57,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:01:57,332 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 28 [2021-06-12 22:01:57,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:01:57,338 INFO L225 Difference]: With dead ends: 5069 [2021-06-12 22:01:57,338 INFO L226 Difference]: Without dead ends: 5069 [2021-06-12 22:01:57,339 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 551.1ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 22:01:57,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5069 states. [2021-06-12 22:01:57,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5069 to 2297. [2021-06-12 22:01:57,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2297 states, 2296 states have (on average 3.451219512195122) internal successors, (7924), 2296 states have internal predecessors, (7924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:57,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2297 states to 2297 states and 7924 transitions. [2021-06-12 22:01:57,383 INFO L78 Accepts]: Start accepts. Automaton has 2297 states and 7924 transitions. Word has length 28 [2021-06-12 22:01:57,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:01:57,384 INFO L482 AbstractCegarLoop]: Abstraction has 2297 states and 7924 transitions. [2021-06-12 22:01:57,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2021-06-12 22:01:57,384 INFO L276 IsEmpty]: Start isEmpty. Operand 2297 states and 7924 transitions. [2021-06-12 22:01:57,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:01:57,386 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:01:57,386 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:01:57,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3961,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:01:57,587 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:01:57,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:01:57,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1450049884, now seen corresponding path program 60 times [2021-06-12 22:01:57,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:01:57,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763093284] [2021-06-12 22:01:57,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:01:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:01:57,629 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:57,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:01:57,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763093284] [2021-06-12 22:01:57,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763093284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:57,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904288579] [2021-06-12 22:01:57,629 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:01:57,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:01:57,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:01:57,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:01:57,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:01:57,762 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:57,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904288579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:57,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:01:57,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:01:57,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273632220] [2021-06-12 22:01:57,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:01:57,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:01:57,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:01:57,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:01:57,764 INFO L87 Difference]: Start difference. First operand 2297 states and 7924 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:59,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:01:59,037 INFO L93 Difference]: Finished difference Result 6700 states and 20456 transitions. [2021-06-12 22:01:59,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 22:01:59,037 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:01:59,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:01:59,046 INFO L225 Difference]: With dead ends: 6700 [2021-06-12 22:01:59,046 INFO L226 Difference]: Without dead ends: 6700 [2021-06-12 22:01:59,047 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 744.4ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 22:01:59,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6700 states. [2021-06-12 22:01:59,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6700 to 2308. [2021-06-12 22:01:59,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2308 states, 2307 states have (on average 3.4581707845687037) internal successors, (7978), 2307 states have internal predecessors, (7978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:59,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2308 states to 2308 states and 7978 transitions. [2021-06-12 22:01:59,100 INFO L78 Accepts]: Start accepts. Automaton has 2308 states and 7978 transitions. Word has length 28 [2021-06-12 22:01:59,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:01:59,100 INFO L482 AbstractCegarLoop]: Abstraction has 2308 states and 7978 transitions. [2021-06-12 22:01:59,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:01:59,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2308 states and 7978 transitions. [2021-06-12 22:01:59,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:01:59,103 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:01:59,103 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:01:59,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3962,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:01:59,305 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:01:59,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:01:59,305 INFO L82 PathProgramCache]: Analyzing trace with hash 2017001964, now seen corresponding path program 61 times [2021-06-12 22:01:59,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:01:59,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23234642] [2021-06-12 22:01:59,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:01:59,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:01:59,348 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:59,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:01:59,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23234642] [2021-06-12 22:01:59,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23234642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:59,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454501686] [2021-06-12 22:01:59,349 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:01:59,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:01:59,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:01:59,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:01:59,478 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:01:59,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454501686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:01:59,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:01:59,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:01:59,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902850394] [2021-06-12 22:01:59,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:01:59,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:01:59,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:01:59,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:01:59,479 INFO L87 Difference]: Start difference. First operand 2308 states and 7978 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:00,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:00,660 INFO L93 Difference]: Finished difference Result 6089 states and 18976 transitions. [2021-06-12 22:02:00,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 22:02:00,661 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:02:00,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:00,672 INFO L225 Difference]: With dead ends: 6089 [2021-06-12 22:02:00,673 INFO L226 Difference]: Without dead ends: 6089 [2021-06-12 22:02:00,673 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 717.9ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 22:02:00,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6089 states. [2021-06-12 22:02:00,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6089 to 2256. [2021-06-12 22:02:00,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 3.4350332594235033) internal successors, (7746), 2255 states have internal predecessors, (7746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:00,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 7746 transitions. [2021-06-12 22:02:00,732 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 7746 transitions. Word has length 28 [2021-06-12 22:02:00,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:00,732 INFO L482 AbstractCegarLoop]: Abstraction has 2256 states and 7746 transitions. [2021-06-12 22:02:00,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:00,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 7746 transitions. [2021-06-12 22:02:00,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:00,735 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:00,735 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:00,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3963 [2021-06-12 22:02:00,941 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:00,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:00,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1095937010, now seen corresponding path program 62 times [2021-06-12 22:02:00,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:00,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698905804] [2021-06-12 22:02:00,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:00,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:00,982 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:00,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:00,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698905804] [2021-06-12 22:02:00,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698905804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:00,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118121272] [2021-06-12 22:02:00,982 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:01,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:02:01,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:01,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:01,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:01,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118121272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:01,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:01,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:02:01,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582630541] [2021-06-12 22:02:01,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:02:01,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:01,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:02:01,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:02:01,115 INFO L87 Difference]: Start difference. First operand 2256 states and 7746 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:02,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:02,175 INFO L93 Difference]: Finished difference Result 5162 states and 15913 transitions. [2021-06-12 22:02:02,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 22:02:02,176 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:02:02,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:02,183 INFO L225 Difference]: With dead ends: 5162 [2021-06-12 22:02:02,183 INFO L226 Difference]: Without dead ends: 5162 [2021-06-12 22:02:02,184 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 646.0ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 22:02:02,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5162 states. [2021-06-12 22:02:02,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5162 to 2269. [2021-06-12 22:02:02,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2268 states have (on average 3.432980599647266) internal successors, (7786), 2268 states have internal predecessors, (7786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:02,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 7786 transitions. [2021-06-12 22:02:02,227 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 7786 transitions. Word has length 28 [2021-06-12 22:02:02,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:02,227 INFO L482 AbstractCegarLoop]: Abstraction has 2269 states and 7786 transitions. [2021-06-12 22:02:02,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:02,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 7786 transitions. [2021-06-12 22:02:02,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:02,230 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:02,230 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:02,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3964,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:02,430 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:02,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:02,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1989400020, now seen corresponding path program 65 times [2021-06-12 22:02:02,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:02,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187021771] [2021-06-12 22:02:02,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:02,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:02,476 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:02,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:02,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187021771] [2021-06-12 22:02:02,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187021771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:02,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196560532] [2021-06-12 22:02:02,476 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:02,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:02:02,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:02,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:02,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:02,593 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:02,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196560532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:02,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:02,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 22:02:02,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853335775] [2021-06-12 22:02:02,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:02:02,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:02,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:02:02,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:02:02,594 INFO L87 Difference]: Start difference. First operand 2269 states and 7786 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:03,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:03,178 INFO L93 Difference]: Finished difference Result 4589 states and 14330 transitions. [2021-06-12 22:02:03,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:02:03,178 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:02:03,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:03,185 INFO L225 Difference]: With dead ends: 4589 [2021-06-12 22:02:03,185 INFO L226 Difference]: Without dead ends: 4589 [2021-06-12 22:02:03,185 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 317.5ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 22:02:03,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4589 states. [2021-06-12 22:02:03,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4589 to 2339. [2021-06-12 22:02:03,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2339 states, 2338 states have (on average 3.417023096663815) internal successors, (7989), 2338 states have internal predecessors, (7989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:03,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2339 states to 2339 states and 7989 transitions. [2021-06-12 22:02:03,227 INFO L78 Accepts]: Start accepts. Automaton has 2339 states and 7989 transitions. Word has length 28 [2021-06-12 22:02:03,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:03,227 INFO L482 AbstractCegarLoop]: Abstraction has 2339 states and 7989 transitions. [2021-06-12 22:02:03,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:03,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2339 states and 7989 transitions. [2021-06-12 22:02:03,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:03,230 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:03,230 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:03,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3965 [2021-06-12 22:02:03,431 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:03,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:03,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1848031388, now seen corresponding path program 63 times [2021-06-12 22:02:03,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:03,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475271050] [2021-06-12 22:02:03,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:03,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:02:03,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:03,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475271050] [2021-06-12 22:02:03,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475271050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:03,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031407269] [2021-06-12 22:02:03,459 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:03,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:02:03,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:03,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:02:03,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:03,564 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:02:03,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031407269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:03,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:03,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:02:03,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110189836] [2021-06-12 22:02:03,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:02:03,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:03,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:02:03,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:02:03,565 INFO L87 Difference]: Start difference. First operand 2339 states and 7989 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-06-12 22:02:03,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:03,736 INFO L93 Difference]: Finished difference Result 3853 states and 12551 transitions. [2021-06-12 22:02:03,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:02:03,736 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 [2021-06-12 22:02:03,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:03,741 INFO L225 Difference]: With dead ends: 3853 [2021-06-12 22:02:03,741 INFO L226 Difference]: Without dead ends: 3829 [2021-06-12 22:02:03,741 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 109.9ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:02:03,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3829 states. [2021-06-12 22:02:03,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3829 to 2701. [2021-06-12 22:02:03,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2701 states, 2700 states have (on average 3.4851851851851854) internal successors, (9410), 2700 states have internal predecessors, (9410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:03,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2701 states to 2701 states and 9410 transitions. [2021-06-12 22:02:03,778 INFO L78 Accepts]: Start accepts. Automaton has 2701 states and 9410 transitions. Word has length 28 [2021-06-12 22:02:03,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:03,778 INFO L482 AbstractCegarLoop]: Abstraction has 2701 states and 9410 transitions. [2021-06-12 22:02:03,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-06-12 22:02:03,778 INFO L276 IsEmpty]: Start isEmpty. Operand 2701 states and 9410 transitions. [2021-06-12 22:02:03,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:03,781 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:03,781 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:03,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3966 [2021-06-12 22:02:03,982 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:03,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:03,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1411062680, now seen corresponding path program 64 times [2021-06-12 22:02:03,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:03,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117139025] [2021-06-12 22:02:03,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:04,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:04,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:04,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117139025] [2021-06-12 22:02:04,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117139025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:04,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197400236] [2021-06-12 22:02:04,016 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:04,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:02:04,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:04,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:02:04,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:04,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:04,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197400236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:04,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:04,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 22:02:04,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948519976] [2021-06-12 22:02:04,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:02:04,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:04,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:02:04,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:02:04,120 INFO L87 Difference]: Start difference. First operand 2701 states and 9410 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:04,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:04,729 INFO L93 Difference]: Finished difference Result 4524 states and 14456 transitions. [2021-06-12 22:02:04,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 22:02:04,729 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:02:04,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:04,735 INFO L225 Difference]: With dead ends: 4524 [2021-06-12 22:02:04,735 INFO L226 Difference]: Without dead ends: 4477 [2021-06-12 22:02:04,735 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 351.1ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 22:02:04,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4477 states. [2021-06-12 22:02:04,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4477 to 2866. [2021-06-12 22:02:04,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2866 states, 2865 states have (on average 3.505759162303665) internal successors, (10044), 2865 states have internal predecessors, (10044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:04,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2866 states to 2866 states and 10044 transitions. [2021-06-12 22:02:04,778 INFO L78 Accepts]: Start accepts. Automaton has 2866 states and 10044 transitions. Word has length 28 [2021-06-12 22:02:04,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:04,778 INFO L482 AbstractCegarLoop]: Abstraction has 2866 states and 10044 transitions. [2021-06-12 22:02:04,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:04,779 INFO L276 IsEmpty]: Start isEmpty. Operand 2866 states and 10044 transitions. [2021-06-12 22:02:04,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:04,782 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:04,782 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:04,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3967 [2021-06-12 22:02:04,982 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:04,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:04,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1347815140, now seen corresponding path program 65 times [2021-06-12 22:02:04,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:04,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180997866] [2021-06-12 22:02:04,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:04,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:05,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:05,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180997866] [2021-06-12 22:02:05,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180997866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:05,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164840151] [2021-06-12 22:02:05,017 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:05,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:02:05,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:05,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:02:05,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:05,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:05,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164840151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:05,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:05,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:02:05,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689159747] [2021-06-12 22:02:05,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:02:05,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:05,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:02:05,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:02:05,130 INFO L87 Difference]: Start difference. First operand 2866 states and 10044 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:05,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:05,818 INFO L93 Difference]: Finished difference Result 4809 states and 15088 transitions. [2021-06-12 22:02:05,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 22:02:05,818 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:02:05,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:05,824 INFO L225 Difference]: With dead ends: 4809 [2021-06-12 22:02:05,824 INFO L226 Difference]: Without dead ends: 4783 [2021-06-12 22:02:05,825 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 430.6ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:02:05,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4783 states. [2021-06-12 22:02:05,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4783 to 2887. [2021-06-12 22:02:05,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2887 states, 2886 states have (on average 3.512127512127512) internal successors, (10136), 2886 states have internal predecessors, (10136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:05,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 10136 transitions. [2021-06-12 22:02:05,890 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 10136 transitions. Word has length 28 [2021-06-12 22:02:05,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:05,890 INFO L482 AbstractCegarLoop]: Abstraction has 2887 states and 10136 transitions. [2021-06-12 22:02:05,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:05,890 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 10136 transitions. [2021-06-12 22:02:05,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:05,893 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:05,893 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:06,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3968,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:06,094 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:06,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:06,094 INFO L82 PathProgramCache]: Analyzing trace with hash -675402358, now seen corresponding path program 66 times [2021-06-12 22:02:06,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:06,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726540013] [2021-06-12 22:02:06,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:06,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:06,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:06,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726540013] [2021-06-12 22:02:06,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726540013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:06,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906110553] [2021-06-12 22:02:06,126 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:06,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:02:06,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:06,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:02:06,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:06,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:06,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906110553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:06,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:06,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:02:06,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467914373] [2021-06-12 22:02:06,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:02:06,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:06,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:02:06,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:02:06,238 INFO L87 Difference]: Start difference. First operand 2887 states and 10136 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:06,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:06,889 INFO L93 Difference]: Finished difference Result 4801 states and 15088 transitions. [2021-06-12 22:02:06,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 22:02:06,889 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:02:06,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:06,895 INFO L225 Difference]: With dead ends: 4801 [2021-06-12 22:02:06,895 INFO L226 Difference]: Without dead ends: 4786 [2021-06-12 22:02:06,895 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 430.6ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:02:06,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4786 states. [2021-06-12 22:02:06,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4786 to 2887. [2021-06-12 22:02:06,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2887 states, 2886 states have (on average 3.5076230076230077) internal successors, (10123), 2886 states have internal predecessors, (10123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:06,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 10123 transitions. [2021-06-12 22:02:06,944 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 10123 transitions. Word has length 28 [2021-06-12 22:02:06,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:06,944 INFO L482 AbstractCegarLoop]: Abstraction has 2887 states and 10123 transitions. [2021-06-12 22:02:06,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:06,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 10123 transitions. [2021-06-12 22:02:06,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:06,947 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:06,947 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:07,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3969 [2021-06-12 22:02:07,148 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:07,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:07,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1724201280, now seen corresponding path program 67 times [2021-06-12 22:02:07,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:07,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437535200] [2021-06-12 22:02:07,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:07,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:07,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:07,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:07,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437535200] [2021-06-12 22:02:07,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437535200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:07,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847329824] [2021-06-12 22:02:07,181 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:07,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:02:07,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:07,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:07,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847329824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:07,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:07,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:02:07,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583385302] [2021-06-12 22:02:07,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:02:07,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:07,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:02:07,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:02:07,274 INFO L87 Difference]: Start difference. First operand 2887 states and 10123 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:02:07,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:07,806 INFO L93 Difference]: Finished difference Result 5555 states and 17807 transitions. [2021-06-12 22:02:07,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:02:07,807 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 [2021-06-12 22:02:07,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:07,814 INFO L225 Difference]: With dead ends: 5555 [2021-06-12 22:02:07,814 INFO L226 Difference]: Without dead ends: 5508 [2021-06-12 22:02:07,814 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 306.8ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 22:02:07,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5508 states. [2021-06-12 22:02:07,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5508 to 3028. [2021-06-12 22:02:07,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3028 states, 3027 states have (on average 3.5500495540138752) internal successors, (10746), 3027 states have internal predecessors, (10746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:07,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3028 states to 3028 states and 10746 transitions. [2021-06-12 22:02:07,868 INFO L78 Accepts]: Start accepts. Automaton has 3028 states and 10746 transitions. Word has length 28 [2021-06-12 22:02:07,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:07,868 INFO L482 AbstractCegarLoop]: Abstraction has 3028 states and 10746 transitions. [2021-06-12 22:02:07,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:02:07,868 INFO L276 IsEmpty]: Start isEmpty. Operand 3028 states and 10746 transitions. [2021-06-12 22:02:07,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:07,872 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:07,872 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:08,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3970,133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:08,072 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:08,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:08,073 INFO L82 PathProgramCache]: Analyzing trace with hash 359577472, now seen corresponding path program 68 times [2021-06-12 22:02:08,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:08,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193036438] [2021-06-12 22:02:08,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:08,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:08,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:02:08,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:08,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193036438] [2021-06-12 22:02:08,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193036438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:08,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944112271] [2021-06-12 22:02:08,105 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:08,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:02:08,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:08,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:02:08,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:08,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:02:08,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944112271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:08,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:08,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 22:02:08,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30575532] [2021-06-12 22:02:08,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:02:08,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:08,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:02:08,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:02:08,190 INFO L87 Difference]: Start difference. First operand 3028 states and 10746 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:08,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:08,356 INFO L93 Difference]: Finished difference Result 4339 states and 14289 transitions. [2021-06-12 22:02:08,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:02:08,356 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:02:08,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:08,362 INFO L225 Difference]: With dead ends: 4339 [2021-06-12 22:02:08,362 INFO L226 Difference]: Without dead ends: 4339 [2021-06-12 22:02:08,363 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 109.9ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:02:08,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4339 states. [2021-06-12 22:02:08,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4339 to 2863. [2021-06-12 22:02:08,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 3.5195667365478687) internal successors, (10073), 2862 states have internal predecessors, (10073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:08,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 10073 transitions. [2021-06-12 22:02:08,409 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 10073 transitions. Word has length 28 [2021-06-12 22:02:08,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:08,409 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 10073 transitions. [2021-06-12 22:02:08,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:08,409 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 10073 transitions. [2021-06-12 22:02:08,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:08,412 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:08,412 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:08,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3971,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:08,613 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:08,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:08,613 INFO L82 PathProgramCache]: Analyzing trace with hash -987104094, now seen corresponding path program 69 times [2021-06-12 22:02:08,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:08,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406431415] [2021-06-12 22:02:08,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:08,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:08,647 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:08,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:08,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406431415] [2021-06-12 22:02:08,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406431415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:08,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762736734] [2021-06-12 22:02:08,647 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:08,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:02:08,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:08,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:08,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:08,746 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:08,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762736734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:08,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:08,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:02:08,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848500609] [2021-06-12 22:02:08,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:02:08,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:08,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:02:08,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:02:08,747 INFO L87 Difference]: Start difference. First operand 2863 states and 10073 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:09,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:09,448 INFO L93 Difference]: Finished difference Result 6209 states and 19661 transitions. [2021-06-12 22:02:09,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 22:02:09,448 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:02:09,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:09,457 INFO L225 Difference]: With dead ends: 6209 [2021-06-12 22:02:09,457 INFO L226 Difference]: Without dead ends: 6209 [2021-06-12 22:02:09,457 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 377.4ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:02:09,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6209 states. [2021-06-12 22:02:09,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6209 to 2881. [2021-06-12 22:02:09,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2881 states, 2880 states have (on average 3.5194444444444444) internal successors, (10136), 2880 states have internal predecessors, (10136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:09,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2881 states to 2881 states and 10136 transitions. [2021-06-12 22:02:09,515 INFO L78 Accepts]: Start accepts. Automaton has 2881 states and 10136 transitions. Word has length 28 [2021-06-12 22:02:09,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:09,515 INFO L482 AbstractCegarLoop]: Abstraction has 2881 states and 10136 transitions. [2021-06-12 22:02:09,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:09,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2881 states and 10136 transitions. [2021-06-12 22:02:09,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:09,519 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:09,519 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:09,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3972,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:09,719 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:09,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:09,720 INFO L82 PathProgramCache]: Analyzing trace with hash -202190000, now seen corresponding path program 70 times [2021-06-12 22:02:09,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:09,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298630708] [2021-06-12 22:02:09,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:09,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:09,754 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:09,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:09,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298630708] [2021-06-12 22:02:09,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298630708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:09,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973627864] [2021-06-12 22:02:09,754 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:09,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:02:09,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:09,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:09,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:09,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973627864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:09,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:09,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:02:09,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329259479] [2021-06-12 22:02:09,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:02:09,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:09,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:02:09,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:02:09,852 INFO L87 Difference]: Start difference. First operand 2881 states and 10136 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:10,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:10,601 INFO L93 Difference]: Finished difference Result 6471 states and 20458 transitions. [2021-06-12 22:02:10,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 22:02:10,601 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:02:10,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:10,610 INFO L225 Difference]: With dead ends: 6471 [2021-06-12 22:02:10,610 INFO L226 Difference]: Without dead ends: 6471 [2021-06-12 22:02:10,610 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 419.8ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 22:02:10,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6471 states. [2021-06-12 22:02:10,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6471 to 2975. [2021-06-12 22:02:10,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2975 states, 2974 states have (on average 3.511432414256893) internal successors, (10443), 2974 states have internal predecessors, (10443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:10,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2975 states to 2975 states and 10443 transitions. [2021-06-12 22:02:10,671 INFO L78 Accepts]: Start accepts. Automaton has 2975 states and 10443 transitions. Word has length 28 [2021-06-12 22:02:10,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:10,671 INFO L482 AbstractCegarLoop]: Abstraction has 2975 states and 10443 transitions. [2021-06-12 22:02:10,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:10,671 INFO L276 IsEmpty]: Start isEmpty. Operand 2975 states and 10443 transitions. [2021-06-12 22:02:10,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:10,675 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:10,675 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:10,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3973,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:10,875 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:10,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:10,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1285212656, now seen corresponding path program 71 times [2021-06-12 22:02:10,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:10,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2522180] [2021-06-12 22:02:10,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:10,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:10,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:10,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2522180] [2021-06-12 22:02:10,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2522180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:10,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966647682] [2021-06-12 22:02:10,907 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:10,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:02:10,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:10,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:02:10,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:11,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:11,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966647682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:11,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:11,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:02:11,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895288508] [2021-06-12 22:02:11,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:02:11,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:11,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:02:11,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:02:11,010 INFO L87 Difference]: Start difference. First operand 2975 states and 10443 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:02:11,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:11,620 INFO L93 Difference]: Finished difference Result 6662 states and 21078 transitions. [2021-06-12 22:02:11,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 22:02:11,620 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 [2021-06-12 22:02:11,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:11,629 INFO L225 Difference]: With dead ends: 6662 [2021-06-12 22:02:11,629 INFO L226 Difference]: Without dead ends: 6626 [2021-06-12 22:02:11,629 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 356.4ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:02:11,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6626 states. [2021-06-12 22:02:11,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6626 to 3377. [2021-06-12 22:02:11,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3377 states, 3376 states have (on average 3.5390995260663507) internal successors, (11948), 3376 states have internal predecessors, (11948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:11,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3377 states to 3377 states and 11948 transitions. [2021-06-12 22:02:11,727 INFO L78 Accepts]: Start accepts. Automaton has 3377 states and 11948 transitions. Word has length 28 [2021-06-12 22:02:11,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:11,727 INFO L482 AbstractCegarLoop]: Abstraction has 3377 states and 11948 transitions. [2021-06-12 22:02:11,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:02:11,727 INFO L276 IsEmpty]: Start isEmpty. Operand 3377 states and 11948 transitions. [2021-06-12 22:02:11,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:11,731 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:11,731 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:11,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3974,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:11,932 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:11,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:11,932 INFO L82 PathProgramCache]: Analyzing trace with hash 185865462, now seen corresponding path program 72 times [2021-06-12 22:02:11,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:11,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273730461] [2021-06-12 22:02:11,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:11,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:11,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:11,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:11,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273730461] [2021-06-12 22:02:11,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273730461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:11,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792710066] [2021-06-12 22:02:11,964 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:11,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:02:11,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:11,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:02:11,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:12,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:12,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792710066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:12,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:12,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:02:12,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302227312] [2021-06-12 22:02:12,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:02:12,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:12,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:02:12,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:02:12,060 INFO L87 Difference]: Start difference. First operand 3377 states and 11948 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:02:12,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:12,649 INFO L93 Difference]: Finished difference Result 6820 states and 21509 transitions. [2021-06-12 22:02:12,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 22:02:12,650 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 [2021-06-12 22:02:12,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:12,659 INFO L225 Difference]: With dead ends: 6820 [2021-06-12 22:02:12,659 INFO L226 Difference]: Without dead ends: 6820 [2021-06-12 22:02:12,660 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 357.2ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:02:12,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6820 states. [2021-06-12 22:02:12,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6820 to 3088. [2021-06-12 22:02:12,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 3.498542274052478) internal successors, (10800), 3087 states have internal predecessors, (10800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:12,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 10800 transitions. [2021-06-12 22:02:12,727 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 10800 transitions. Word has length 28 [2021-06-12 22:02:12,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:12,727 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 10800 transitions. [2021-06-12 22:02:12,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:02:12,727 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 10800 transitions. [2021-06-12 22:02:12,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:12,731 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:12,731 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:12,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3975 [2021-06-12 22:02:12,931 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:12,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:12,931 INFO L82 PathProgramCache]: Analyzing trace with hash -247011142, now seen corresponding path program 73 times [2021-06-12 22:02:12,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:12,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467959896] [2021-06-12 22:02:12,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:12,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:12,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:12,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467959896] [2021-06-12 22:02:12,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467959896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:12,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829093659] [2021-06-12 22:02:12,965 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:12,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:12,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:13,056 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:13,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829093659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:13,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:13,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:02:13,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363163541] [2021-06-12 22:02:13,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:02:13,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:13,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:02:13,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:02:13,057 INFO L87 Difference]: Start difference. First operand 3088 states and 10800 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:13,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:13,729 INFO L93 Difference]: Finished difference Result 5973 states and 19224 transitions. [2021-06-12 22:02:13,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 22:02:13,729 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:02:13,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:13,738 INFO L225 Difference]: With dead ends: 5973 [2021-06-12 22:02:13,738 INFO L226 Difference]: Without dead ends: 5969 [2021-06-12 22:02:13,738 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 399.4ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 22:02:13,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5969 states. [2021-06-12 22:02:13,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5969 to 2848. [2021-06-12 22:02:13,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2848 states, 2847 states have (on average 3.523709167544784) internal successors, (10032), 2847 states have internal predecessors, (10032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:13,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2848 states to 2848 states and 10032 transitions. [2021-06-12 22:02:13,792 INFO L78 Accepts]: Start accepts. Automaton has 2848 states and 10032 transitions. Word has length 28 [2021-06-12 22:02:13,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:13,792 INFO L482 AbstractCegarLoop]: Abstraction has 2848 states and 10032 transitions. [2021-06-12 22:02:13,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:13,792 INFO L276 IsEmpty]: Start isEmpty. Operand 2848 states and 10032 transitions. [2021-06-12 22:02:13,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:13,795 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:13,795 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:13,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3976,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:13,996 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:13,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:13,996 INFO L82 PathProgramCache]: Analyzing trace with hash -519020332, now seen corresponding path program 74 times [2021-06-12 22:02:13,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:13,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785677542] [2021-06-12 22:02:13,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:13,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:14,030 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:14,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:14,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785677542] [2021-06-12 22:02:14,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785677542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:14,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327120859] [2021-06-12 22:02:14,030 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:14,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:02:14,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:14,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:14,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:14,147 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:14,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327120859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:14,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:14,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:02:14,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417233368] [2021-06-12 22:02:14,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:02:14,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:14,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:02:14,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:02:14,148 INFO L87 Difference]: Start difference. First operand 2848 states and 10032 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:15,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:15,168 INFO L93 Difference]: Finished difference Result 9218 states and 30019 transitions. [2021-06-12 22:02:15,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 22:02:15,168 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:02:15,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:15,181 INFO L225 Difference]: With dead ends: 9218 [2021-06-12 22:02:15,181 INFO L226 Difference]: Without dead ends: 9218 [2021-06-12 22:02:15,182 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 599.9ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 22:02:15,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9218 states. [2021-06-12 22:02:15,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9218 to 3024. [2021-06-12 22:02:15,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3024 states, 3023 states have (on average 3.595765795567317) internal successors, (10870), 3023 states have internal predecessors, (10870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:15,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3024 states to 3024 states and 10870 transitions. [2021-06-12 22:02:15,260 INFO L78 Accepts]: Start accepts. Automaton has 3024 states and 10870 transitions. Word has length 28 [2021-06-12 22:02:15,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:15,260 INFO L482 AbstractCegarLoop]: Abstraction has 3024 states and 10870 transitions. [2021-06-12 22:02:15,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:15,260 INFO L276 IsEmpty]: Start isEmpty. Operand 3024 states and 10870 transitions. [2021-06-12 22:02:15,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:15,263 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:15,263 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:15,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3977 [2021-06-12 22:02:15,464 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:15,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:15,464 INFO L82 PathProgramCache]: Analyzing trace with hash 47931748, now seen corresponding path program 75 times [2021-06-12 22:02:15,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:15,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085131858] [2021-06-12 22:02:15,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:15,497 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:15,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:15,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085131858] [2021-06-12 22:02:15,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085131858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:15,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803231534] [2021-06-12 22:02:15,497 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:15,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:02:15,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:15,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:15,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:15,614 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:15,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803231534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:15,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:15,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:02:15,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840085516] [2021-06-12 22:02:15,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:02:15,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:15,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:02:15,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:02:15,615 INFO L87 Difference]: Start difference. First operand 3024 states and 10870 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:16,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:16,614 INFO L93 Difference]: Finished difference Result 9047 states and 29554 transitions. [2021-06-12 22:02:16,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 22:02:16,615 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:02:16,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:16,628 INFO L225 Difference]: With dead ends: 9047 [2021-06-12 22:02:16,628 INFO L226 Difference]: Without dead ends: 9047 [2021-06-12 22:02:16,628 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 591.9ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 22:02:16,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9047 states. [2021-06-12 22:02:16,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9047 to 2996. [2021-06-12 22:02:16,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2996 states, 2995 states have (on average 3.579632721202003) internal successors, (10721), 2995 states have internal predecessors, (10721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:16,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2996 states to 2996 states and 10721 transitions. [2021-06-12 22:02:16,710 INFO L78 Accepts]: Start accepts. Automaton has 2996 states and 10721 transitions. Word has length 28 [2021-06-12 22:02:16,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:16,710 INFO L482 AbstractCegarLoop]: Abstraction has 2996 states and 10721 transitions. [2021-06-12 22:02:16,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:16,710 INFO L276 IsEmpty]: Start isEmpty. Operand 2996 states and 10721 transitions. [2021-06-12 22:02:16,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:16,714 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:16,714 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:16,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3978,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:16,914 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:16,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:16,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1124414110, now seen corresponding path program 76 times [2021-06-12 22:02:16,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:16,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106252232] [2021-06-12 22:02:16,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:16,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:16,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:16,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:16,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106252232] [2021-06-12 22:02:16,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106252232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:16,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095666638] [2021-06-12 22:02:16,947 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:16,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:02:16,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:16,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:16,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:17,053 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:17,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095666638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:17,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:17,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 22:02:17,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666161775] [2021-06-12 22:02:17,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:02:17,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:17,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:02:17,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:02:17,054 INFO L87 Difference]: Start difference. First operand 2996 states and 10721 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:17,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:17,980 INFO L93 Difference]: Finished difference Result 8494 states and 26829 transitions. [2021-06-12 22:02:17,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 22:02:17,980 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:02:17,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:17,993 INFO L225 Difference]: With dead ends: 8494 [2021-06-12 22:02:17,993 INFO L226 Difference]: Without dead ends: 8494 [2021-06-12 22:02:17,994 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 507.3ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 22:02:18,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8494 states. [2021-06-12 22:02:18,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8494 to 3016. [2021-06-12 22:02:18,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3016 states, 3015 states have (on average 3.5830845771144277) internal successors, (10803), 3015 states have internal predecessors, (10803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:18,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 10803 transitions. [2021-06-12 22:02:18,072 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 10803 transitions. Word has length 28 [2021-06-12 22:02:18,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:18,072 INFO L482 AbstractCegarLoop]: Abstraction has 3016 states and 10803 transitions. [2021-06-12 22:02:18,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:18,072 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 10803 transitions. [2021-06-12 22:02:18,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:18,076 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:18,076 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:18,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3979 [2021-06-12 22:02:18,276 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:18,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:18,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1043038022, now seen corresponding path program 77 times [2021-06-12 22:02:18,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:18,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334331556] [2021-06-12 22:02:18,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:18,319 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:18,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:18,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334331556] [2021-06-12 22:02:18,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334331556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:18,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180536043] [2021-06-12 22:02:18,319 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:18,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:02:18,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:18,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:18,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:18,423 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:18,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180536043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:18,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:18,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 22:02:18,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228576148] [2021-06-12 22:02:18,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:02:18,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:18,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:02:18,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:02:18,424 INFO L87 Difference]: Start difference. First operand 3016 states and 10803 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:19,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:19,322 INFO L93 Difference]: Finished difference Result 8003 states and 25641 transitions. [2021-06-12 22:02:19,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 22:02:19,323 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:02:19,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:19,334 INFO L225 Difference]: With dead ends: 8003 [2021-06-12 22:02:19,334 INFO L226 Difference]: Without dead ends: 7995 [2021-06-12 22:02:19,335 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 479.7ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:02:19,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7995 states. [2021-06-12 22:02:19,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7995 to 2998. [2021-06-12 22:02:19,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2998 states, 2997 states have (on average 3.578912245578912) internal successors, (10726), 2997 states have internal predecessors, (10726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:19,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 10726 transitions. [2021-06-12 22:02:19,408 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 10726 transitions. Word has length 28 [2021-06-12 22:02:19,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:19,409 INFO L482 AbstractCegarLoop]: Abstraction has 2998 states and 10726 transitions. [2021-06-12 22:02:19,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:19,409 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 10726 transitions. [2021-06-12 22:02:19,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:19,412 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:19,412 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:19,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3980 [2021-06-12 22:02:19,613 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:19,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:19,613 INFO L82 PathProgramCache]: Analyzing trace with hash -112380806, now seen corresponding path program 78 times [2021-06-12 22:02:19,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:19,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19587034] [2021-06-12 22:02:19,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:19,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:19,648 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:19,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:19,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19587034] [2021-06-12 22:02:19,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19587034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:19,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926796955] [2021-06-12 22:02:19,649 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:19,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:02:19,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:19,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:19,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:19,766 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:19,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926796955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:19,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:19,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:02:19,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234521987] [2021-06-12 22:02:19,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:02:19,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:19,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:02:19,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:02:19,767 INFO L87 Difference]: Start difference. First operand 2998 states and 10726 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:20,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:20,726 INFO L93 Difference]: Finished difference Result 7921 states and 25395 transitions. [2021-06-12 22:02:20,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 22:02:20,726 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:02:20,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:20,737 INFO L225 Difference]: With dead ends: 7921 [2021-06-12 22:02:20,737 INFO L226 Difference]: Without dead ends: 7921 [2021-06-12 22:02:20,738 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 538.5ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:02:20,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7921 states. [2021-06-12 22:02:20,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7921 to 3014. [2021-06-12 22:02:20,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3014 states, 3013 states have (on average 3.5811483571191505) internal successors, (10790), 3013 states have internal predecessors, (10790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:20,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3014 states to 3014 states and 10790 transitions. [2021-06-12 22:02:20,806 INFO L78 Accepts]: Start accepts. Automaton has 3014 states and 10790 transitions. Word has length 28 [2021-06-12 22:02:20,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:20,806 INFO L482 AbstractCegarLoop]: Abstraction has 3014 states and 10790 transitions. [2021-06-12 22:02:20,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:20,806 INFO L276 IsEmpty]: Start isEmpty. Operand 3014 states and 10790 transitions. [2021-06-12 22:02:20,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:20,810 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:20,810 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:21,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3981,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:21,013 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:21,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:21,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1530658348, now seen corresponding path program 79 times [2021-06-12 22:02:21,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:21,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553964420] [2021-06-12 22:02:21,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:21,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:21,047 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:21,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:21,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553964420] [2021-06-12 22:02:21,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553964420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:21,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264049181] [2021-06-12 22:02:21,047 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:21,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:21,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:21,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:21,156 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:21,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264049181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:21,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:21,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:02:21,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954216788] [2021-06-12 22:02:21,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:02:21,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:21,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:02:21,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:02:21,157 INFO L87 Difference]: Start difference. First operand 3014 states and 10790 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:22,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:22,086 INFO L93 Difference]: Finished difference Result 7589 states and 24611 transitions. [2021-06-12 22:02:22,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 22:02:22,087 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:02:22,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:22,098 INFO L225 Difference]: With dead ends: 7589 [2021-06-12 22:02:22,098 INFO L226 Difference]: Without dead ends: 7581 [2021-06-12 22:02:22,098 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 504.1ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:02:22,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7581 states. [2021-06-12 22:02:22,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7581 to 2771. [2021-06-12 22:02:22,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2771 states, 2770 states have (on average 3.4974729241877256) internal successors, (9688), 2770 states have internal predecessors, (9688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:22,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2771 states to 2771 states and 9688 transitions. [2021-06-12 22:02:22,167 INFO L78 Accepts]: Start accepts. Automaton has 2771 states and 9688 transitions. Word has length 28 [2021-06-12 22:02:22,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:22,167 INFO L482 AbstractCegarLoop]: Abstraction has 2771 states and 9688 transitions. [2021-06-12 22:02:22,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:22,168 INFO L276 IsEmpty]: Start isEmpty. Operand 2771 states and 9688 transitions. [2021-06-12 22:02:22,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:22,171 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:22,171 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:22,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3982 [2021-06-12 22:02:22,372 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:22,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:22,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1614061928, now seen corresponding path program 80 times [2021-06-12 22:02:22,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:22,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657774630] [2021-06-12 22:02:22,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:22,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:22,407 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:22,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:22,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657774630] [2021-06-12 22:02:22,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657774630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:22,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503583504] [2021-06-12 22:02:22,407 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:22,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:02:22,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:22,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:22,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:22,526 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:22,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503583504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:22,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:22,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:02:22,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230167688] [2021-06-12 22:02:22,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:02:22,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:22,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:02:22,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:02:22,527 INFO L87 Difference]: Start difference. First operand 2771 states and 9688 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:23,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:23,355 INFO L93 Difference]: Finished difference Result 5790 states and 18502 transitions. [2021-06-12 22:02:23,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 22:02:23,356 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:02:23,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:23,363 INFO L225 Difference]: With dead ends: 5790 [2021-06-12 22:02:23,363 INFO L226 Difference]: Without dead ends: 5790 [2021-06-12 22:02:23,364 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 511.6ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:02:23,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5790 states. [2021-06-12 22:02:23,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5790 to 2783. [2021-06-12 22:02:23,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2782 states have (on average 3.4960460100647017) internal successors, (9726), 2782 states have internal predecessors, (9726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:23,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 9726 transitions. [2021-06-12 22:02:23,431 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 9726 transitions. Word has length 28 [2021-06-12 22:02:23,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:23,431 INFO L482 AbstractCegarLoop]: Abstraction has 2783 states and 9726 transitions. [2021-06-12 22:02:23,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:23,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 9726 transitions. [2021-06-12 22:02:23,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:23,435 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:23,435 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:23,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3983,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:23,635 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:23,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:23,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1027545192, now seen corresponding path program 81 times [2021-06-12 22:02:23,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:23,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457069983] [2021-06-12 22:02:23,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:23,672 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:23,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:23,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457069983] [2021-06-12 22:02:23,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457069983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:23,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221652218] [2021-06-12 22:02:23,672 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:23,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:02:23,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:23,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:23,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:23,802 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:23,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221652218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:23,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:23,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:02:23,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914782822] [2021-06-12 22:02:23,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:02:23,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:23,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:02:23,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:02:23,803 INFO L87 Difference]: Start difference. First operand 2783 states and 9726 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:24,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:24,880 INFO L93 Difference]: Finished difference Result 6569 states and 20497 transitions. [2021-06-12 22:02:24,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 22:02:24,880 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:02:24,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:24,889 INFO L225 Difference]: With dead ends: 6569 [2021-06-12 22:02:24,889 INFO L226 Difference]: Without dead ends: 6569 [2021-06-12 22:02:24,890 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 678.7ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 22:02:24,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6569 states. [2021-06-12 22:02:24,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6569 to 2849. [2021-06-12 22:02:24,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 2848 states have (on average 3.4912219101123596) internal successors, (9943), 2848 states have internal predecessors, (9943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:24,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 9943 transitions. [2021-06-12 22:02:24,962 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 9943 transitions. Word has length 28 [2021-06-12 22:02:24,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:24,962 INFO L482 AbstractCegarLoop]: Abstraction has 2849 states and 9943 transitions. [2021-06-12 22:02:24,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:24,962 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 9943 transitions. [2021-06-12 22:02:24,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:24,965 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:24,965 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:25,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3984,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:25,166 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:25,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:25,166 INFO L82 PathProgramCache]: Analyzing trace with hash 615493962, now seen corresponding path program 82 times [2021-06-12 22:02:25,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:25,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661430563] [2021-06-12 22:02:25,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:25,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:25,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:25,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:25,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661430563] [2021-06-12 22:02:25,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661430563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:25,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012738535] [2021-06-12 22:02:25,202 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:25,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:02:25,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:25,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:25,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:25,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012738535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:25,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:25,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:02:25,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730261174] [2021-06-12 22:02:25,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:02:25,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:25,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:02:25,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:02:25,324 INFO L87 Difference]: Start difference. First operand 2849 states and 9943 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:26,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:26,311 INFO L93 Difference]: Finished difference Result 6132 states and 19351 transitions. [2021-06-12 22:02:26,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 22:02:26,311 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:02:26,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:26,319 INFO L225 Difference]: With dead ends: 6132 [2021-06-12 22:02:26,320 INFO L226 Difference]: Without dead ends: 6128 [2021-06-12 22:02:26,320 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 596.2ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 22:02:26,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6128 states. [2021-06-12 22:02:26,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6128 to 2775. [2021-06-12 22:02:26,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2774 states have (on average 3.4870223503965394) internal successors, (9673), 2774 states have internal predecessors, (9673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:26,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 9673 transitions. [2021-06-12 22:02:26,393 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 9673 transitions. Word has length 28 [2021-06-12 22:02:26,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:26,393 INFO L482 AbstractCegarLoop]: Abstraction has 2775 states and 9673 transitions. [2021-06-12 22:02:26,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:26,393 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 9673 transitions. [2021-06-12 22:02:26,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:26,396 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:26,396 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:26,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3985,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:26,597 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:26,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:26,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1194937186, now seen corresponding path program 66 times [2021-06-12 22:02:26,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:26,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655948599] [2021-06-12 22:02:26,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:26,637 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:26,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:26,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655948599] [2021-06-12 22:02:26,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655948599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:26,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346329615] [2021-06-12 22:02:26,638 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:26,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:02:26,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:26,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:26,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:26,736 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:26,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346329615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:26,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:26,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:02:26,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096084341] [2021-06-12 22:02:26,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:02:26,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:26,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:02:26,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:02:26,737 INFO L87 Difference]: Start difference. First operand 2775 states and 9673 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-06-12 22:02:27,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:27,282 INFO L93 Difference]: Finished difference Result 5268 states and 16907 transitions. [2021-06-12 22:02:27,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 22:02:27,282 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 [2021-06-12 22:02:27,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:27,291 INFO L225 Difference]: With dead ends: 5268 [2021-06-12 22:02:27,292 INFO L226 Difference]: Without dead ends: 5268 [2021-06-12 22:02:27,292 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 319.6ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:02:27,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5268 states. [2021-06-12 22:02:27,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5268 to 2775. [2021-06-12 22:02:27,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2774 states have (on average 3.4891852919971162) internal successors, (9679), 2774 states have internal predecessors, (9679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:27,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 9679 transitions. [2021-06-12 22:02:27,346 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 9679 transitions. Word has length 28 [2021-06-12 22:02:27,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:27,346 INFO L482 AbstractCegarLoop]: Abstraction has 2775 states and 9679 transitions. [2021-06-12 22:02:27,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-06-12 22:02:27,346 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 9679 transitions. [2021-06-12 22:02:27,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:27,350 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:27,350 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:27,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3986,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:27,550 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:27,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:27,550 INFO L82 PathProgramCache]: Analyzing trace with hash -416862576, now seen corresponding path program 67 times [2021-06-12 22:02:27,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:27,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759886108] [2021-06-12 22:02:27,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:27,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:27,590 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:27,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:27,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759886108] [2021-06-12 22:02:27,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759886108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:27,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303255900] [2021-06-12 22:02:27,591 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:27,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:27,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:27,689 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:27,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303255900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:27,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:27,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:02:27,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623268039] [2021-06-12 22:02:27,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:02:27,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:27,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:02:27,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:02:27,689 INFO L87 Difference]: Start difference. First operand 2775 states and 9679 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-06-12 22:02:28,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:28,447 INFO L93 Difference]: Finished difference Result 5584 states and 17812 transitions. [2021-06-12 22:02:28,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 22:02:28,447 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 [2021-06-12 22:02:28,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:28,455 INFO L225 Difference]: With dead ends: 5584 [2021-06-12 22:02:28,456 INFO L226 Difference]: Without dead ends: 5584 [2021-06-12 22:02:28,456 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 428.2ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 22:02:28,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5584 states. [2021-06-12 22:02:28,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5584 to 2766. [2021-06-12 22:02:28,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2766 states, 2765 states have (on average 3.489330922242315) internal successors, (9648), 2765 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:28,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2766 states to 2766 states and 9648 transitions. [2021-06-12 22:02:28,505 INFO L78 Accepts]: Start accepts. Automaton has 2766 states and 9648 transitions. Word has length 28 [2021-06-12 22:02:28,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:28,505 INFO L482 AbstractCegarLoop]: Abstraction has 2766 states and 9648 transitions. [2021-06-12 22:02:28,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-06-12 22:02:28,505 INFO L276 IsEmpty]: Start isEmpty. Operand 2766 states and 9648 transitions. [2021-06-12 22:02:28,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:28,508 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:28,508 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:28,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3987 [2021-06-12 22:02:28,709 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:28,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:28,709 INFO L82 PathProgramCache]: Analyzing trace with hash -648402224, now seen corresponding path program 68 times [2021-06-12 22:02:28,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:28,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091045635] [2021-06-12 22:02:28,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:28,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:28,749 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:28,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:28,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091045635] [2021-06-12 22:02:28,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091045635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:28,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001631383] [2021-06-12 22:02:28,749 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:28,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:02:28,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:28,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:28,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:28,850 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:28,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001631383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:28,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:28,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:02:28,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993175837] [2021-06-12 22:02:28,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:02:28,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:28,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:02:28,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:02:28,851 INFO L87 Difference]: Start difference. First operand 2766 states and 9648 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-06-12 22:02:29,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:29,670 INFO L93 Difference]: Finished difference Result 6079 states and 19142 transitions. [2021-06-12 22:02:29,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 22:02:29,671 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 [2021-06-12 22:02:29,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:29,678 INFO L225 Difference]: With dead ends: 6079 [2021-06-12 22:02:29,679 INFO L226 Difference]: Without dead ends: 6079 [2021-06-12 22:02:29,679 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 506.2ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:02:29,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6079 states. [2021-06-12 22:02:29,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6079 to 2826. [2021-06-12 22:02:29,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2826 states, 2825 states have (on average 3.485309734513274) internal successors, (9846), 2825 states have internal predecessors, (9846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:29,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2826 states to 2826 states and 9846 transitions. [2021-06-12 22:02:29,735 INFO L78 Accepts]: Start accepts. Automaton has 2826 states and 9846 transitions. Word has length 28 [2021-06-12 22:02:29,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:29,735 INFO L482 AbstractCegarLoop]: Abstraction has 2826 states and 9846 transitions. [2021-06-12 22:02:29,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-06-12 22:02:29,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2826 states and 9846 transitions. [2021-06-12 22:02:29,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:29,739 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:29,739 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:29,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3988,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:29,939 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:29,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:29,940 INFO L82 PathProgramCache]: Analyzing trace with hash -628686410, now seen corresponding path program 69 times [2021-06-12 22:02:29,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:29,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925120730] [2021-06-12 22:02:29,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:29,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:29,973 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:29,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:29,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925120730] [2021-06-12 22:02:29,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925120730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:29,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655045803] [2021-06-12 22:02:29,973 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:29,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:02:29,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:30,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:30,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:30,089 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:30,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655045803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:30,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:30,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-12 22:02:30,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284989482] [2021-06-12 22:02:30,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:02:30,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:30,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:02:30,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:02:30,090 INFO L87 Difference]: Start difference. First operand 2826 states and 9846 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:30,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:30,642 INFO L93 Difference]: Finished difference Result 6807 states and 22904 transitions. [2021-06-12 22:02:30,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 22:02:30,643 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:02:30,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:30,652 INFO L225 Difference]: With dead ends: 6807 [2021-06-12 22:02:30,652 INFO L226 Difference]: Without dead ends: 6807 [2021-06-12 22:02:30,653 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 364.8ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:02:30,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6807 states. [2021-06-12 22:02:30,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6807 to 4024. [2021-06-12 22:02:30,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4024 states, 4023 states have (on average 3.6109868257519264) internal successors, (14527), 4023 states have internal predecessors, (14527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:30,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4024 states to 4024 states and 14527 transitions. [2021-06-12 22:02:30,741 INFO L78 Accepts]: Start accepts. Automaton has 4024 states and 14527 transitions. Word has length 28 [2021-06-12 22:02:30,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:30,741 INFO L482 AbstractCegarLoop]: Abstraction has 4024 states and 14527 transitions. [2021-06-12 22:02:30,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:30,741 INFO L276 IsEmpty]: Start isEmpty. Operand 4024 states and 14527 transitions. [2021-06-12 22:02:30,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:30,746 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:30,746 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:30,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3989 [2021-06-12 22:02:30,946 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:30,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:30,947 INFO L82 PathProgramCache]: Analyzing trace with hash -693223366, now seen corresponding path program 70 times [2021-06-12 22:02:30,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:30,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096197376] [2021-06-12 22:02:30,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:30,986 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:30,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:30,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096197376] [2021-06-12 22:02:30,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096197376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:30,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230029279] [2021-06-12 22:02:30,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:31,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:02:31,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:31,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:31,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:31,079 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:31,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230029279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:31,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:31,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:02:31,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127525115] [2021-06-12 22:02:31,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:02:31,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:31,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:02:31,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:02:31,080 INFO L87 Difference]: Start difference. First operand 4024 states and 14527 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-06-12 22:02:31,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:31,863 INFO L93 Difference]: Finished difference Result 7353 states and 24861 transitions. [2021-06-12 22:02:31,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 22:02:31,863 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 [2021-06-12 22:02:31,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:31,875 INFO L225 Difference]: With dead ends: 7353 [2021-06-12 22:02:31,875 INFO L226 Difference]: Without dead ends: 7349 [2021-06-12 22:02:31,876 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 443.3ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:02:31,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7349 states. [2021-06-12 22:02:31,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7349 to 3916. [2021-06-12 22:02:31,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 3.6206896551724137) internal successors, (14175), 3915 states have internal predecessors, (14175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:31,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 14175 transitions. [2021-06-12 22:02:31,951 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 14175 transitions. Word has length 28 [2021-06-12 22:02:31,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:31,952 INFO L482 AbstractCegarLoop]: Abstraction has 3916 states and 14175 transitions. [2021-06-12 22:02:31,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-06-12 22:02:31,952 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 14175 transitions. [2021-06-12 22:02:31,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:31,984 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:31,984 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:32,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3990 [2021-06-12 22:02:32,184 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:32,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:32,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1327034102, now seen corresponding path program 83 times [2021-06-12 22:02:32,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:32,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278288461] [2021-06-12 22:02:32,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:32,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:32,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:32,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:32,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278288461] [2021-06-12 22:02:32,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278288461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:32,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905225970] [2021-06-12 22:02:32,217 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:32,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:02:32,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:32,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:02:32,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:32,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:32,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905225970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:32,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:32,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 22:02:32,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402249267] [2021-06-12 22:02:32,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:02:32,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:32,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:02:32,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:02:32,337 INFO L87 Difference]: Start difference. First operand 3916 states and 14175 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:33,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:33,160 INFO L93 Difference]: Finished difference Result 8141 states and 27286 transitions. [2021-06-12 22:02:33,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:02:33,161 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:02:33,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:33,173 INFO L225 Difference]: With dead ends: 8141 [2021-06-12 22:02:33,173 INFO L226 Difference]: Without dead ends: 8132 [2021-06-12 22:02:33,173 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 495.5ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:02:33,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8132 states. [2021-06-12 22:02:33,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8132 to 4360. [2021-06-12 22:02:33,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4360 states, 4359 states have (on average 3.7118605184675384) internal successors, (16180), 4359 states have internal predecessors, (16180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:33,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4360 states to 4360 states and 16180 transitions. [2021-06-12 22:02:33,260 INFO L78 Accepts]: Start accepts. Automaton has 4360 states and 16180 transitions. Word has length 28 [2021-06-12 22:02:33,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:33,260 INFO L482 AbstractCegarLoop]: Abstraction has 4360 states and 16180 transitions. [2021-06-12 22:02:33,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:33,261 INFO L276 IsEmpty]: Start isEmpty. Operand 4360 states and 16180 transitions. [2021-06-12 22:02:33,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:33,266 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:33,266 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:33,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3991 [2021-06-12 22:02:33,466 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:33,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:33,467 INFO L82 PathProgramCache]: Analyzing trace with hash -926591794, now seen corresponding path program 84 times [2021-06-12 22:02:33,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:33,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373325337] [2021-06-12 22:02:33,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:33,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:33,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:33,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:33,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373325337] [2021-06-12 22:02:33,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373325337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:33,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194124135] [2021-06-12 22:02:33,494 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:33,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:02:33,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:33,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:02:33,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:33,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194124135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:33,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:33,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 22:02:33,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493368494] [2021-06-12 22:02:33,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:02:33,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:33,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:02:33,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:02:33,602 INFO L87 Difference]: Start difference. First operand 4360 states and 16180 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:34,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:34,426 INFO L93 Difference]: Finished difference Result 8418 states and 28143 transitions. [2021-06-12 22:02:34,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:02:34,427 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:02:34,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:34,439 INFO L225 Difference]: With dead ends: 8418 [2021-06-12 22:02:34,439 INFO L226 Difference]: Without dead ends: 8418 [2021-06-12 22:02:34,439 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 482.8ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:02:34,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8418 states. [2021-06-12 22:02:34,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8418 to 4380. [2021-06-12 22:02:34,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4380 states, 4379 states have (on average 3.69901804064855) internal successors, (16198), 4379 states have internal predecessors, (16198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:34,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4380 states to 4380 states and 16198 transitions. [2021-06-12 22:02:34,525 INFO L78 Accepts]: Start accepts. Automaton has 4380 states and 16198 transitions. Word has length 28 [2021-06-12 22:02:34,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:34,525 INFO L482 AbstractCegarLoop]: Abstraction has 4380 states and 16198 transitions. [2021-06-12 22:02:34,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:34,525 INFO L276 IsEmpty]: Start isEmpty. Operand 4380 states and 16198 transitions. [2021-06-12 22:02:34,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:34,530 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:34,530 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:34,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3992,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:34,731 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:34,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:34,731 INFO L82 PathProgramCache]: Analyzing trace with hash -2129998084, now seen corresponding path program 85 times [2021-06-12 22:02:34,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:34,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691277442] [2021-06-12 22:02:34,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:34,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:34,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:34,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:34,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691277442] [2021-06-12 22:02:34,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691277442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:34,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584306314] [2021-06-12 22:02:34,763 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:34,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:02:34,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:34,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:34,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584306314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:34,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:34,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:02:34,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522921479] [2021-06-12 22:02:34,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:02:34,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:34,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:02:34,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:02:34,860 INFO L87 Difference]: Start difference. First operand 4380 states and 16198 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-12 22:02:35,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:35,294 INFO L93 Difference]: Finished difference Result 7845 states and 27662 transitions. [2021-06-12 22:02:35,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:02:35,295 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 [2021-06-12 22:02:35,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:35,307 INFO L225 Difference]: With dead ends: 7845 [2021-06-12 22:02:35,307 INFO L226 Difference]: Without dead ends: 7762 [2021-06-12 22:02:35,307 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 228.3ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:02:35,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7762 states. [2021-06-12 22:02:35,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7762 to 5838. [2021-06-12 22:02:35,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5838 states, 5837 states have (on average 3.7627205756381703) internal successors, (21963), 5837 states have internal predecessors, (21963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:35,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5838 states to 5838 states and 21963 transitions. [2021-06-12 22:02:35,429 INFO L78 Accepts]: Start accepts. Automaton has 5838 states and 21963 transitions. Word has length 28 [2021-06-12 22:02:35,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:35,429 INFO L482 AbstractCegarLoop]: Abstraction has 5838 states and 21963 transitions. [2021-06-12 22:02:35,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-12 22:02:35,429 INFO L276 IsEmpty]: Start isEmpty. Operand 5838 states and 21963 transitions. [2021-06-12 22:02:35,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:35,436 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:35,436 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:35,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3993,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:35,637 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:35,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:35,637 INFO L82 PathProgramCache]: Analyzing trace with hash -921983104, now seen corresponding path program 86 times [2021-06-12 22:02:35,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:35,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561532065] [2021-06-12 22:02:35,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:35,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:35,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:02:35,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:35,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561532065] [2021-06-12 22:02:35,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561532065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:35,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485980836] [2021-06-12 22:02:35,663 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:35,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:02:35,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:35,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:02:35,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:35,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:02:35,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485980836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:35,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:35,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-12 22:02:35,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694194250] [2021-06-12 22:02:35,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:02:35,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:35,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:02:35,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:02:35,740 INFO L87 Difference]: Start difference. First operand 5838 states and 21963 transitions. Second operand has 10 states, 10 states have (on average 3.9) 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) [2021-06-12 22:02:35,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:35,912 INFO L93 Difference]: Finished difference Result 8103 states and 28515 transitions. [2021-06-12 22:02:35,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:02:35,913 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) 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 [2021-06-12 22:02:35,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:35,924 INFO L225 Difference]: With dead ends: 8103 [2021-06-12 22:02:35,924 INFO L226 Difference]: Without dead ends: 8103 [2021-06-12 22:02:35,924 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 111.1ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:02:35,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8103 states. [2021-06-12 22:02:36,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8103 to 5980. [2021-06-12 22:02:36,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5980 states, 5979 states have (on average 3.7395885599598597) internal successors, (22359), 5979 states have internal predecessors, (22359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:36,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5980 states to 5980 states and 22359 transitions. [2021-06-12 22:02:36,027 INFO L78 Accepts]: Start accepts. Automaton has 5980 states and 22359 transitions. Word has length 28 [2021-06-12 22:02:36,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:36,027 INFO L482 AbstractCegarLoop]: Abstraction has 5980 states and 22359 transitions. [2021-06-12 22:02:36,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) 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) [2021-06-12 22:02:36,027 INFO L276 IsEmpty]: Start isEmpty. Operand 5980 states and 22359 transitions. [2021-06-12 22:02:36,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:36,035 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:36,035 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:36,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3994,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:36,236 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:36,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:36,236 INFO L82 PathProgramCache]: Analyzing trace with hash 8216640, now seen corresponding path program 87 times [2021-06-12 22:02:36,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:36,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113425329] [2021-06-12 22:02:36,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:36,276 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:36,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:36,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113425329] [2021-06-12 22:02:36,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113425329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:36,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870192127] [2021-06-12 22:02:36,276 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:36,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:02:36,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:36,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:36,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:36,365 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:36,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870192127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:36,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:36,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 22:02:36,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904611951] [2021-06-12 22:02:36,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:02:36,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:36,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:02:36,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:02:36,366 INFO L87 Difference]: Start difference. First operand 5980 states and 22359 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-12 22:02:37,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:37,096 INFO L93 Difference]: Finished difference Result 12480 states and 43435 transitions. [2021-06-12 22:02:37,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 22:02:37,097 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 [2021-06-12 22:02:37,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:37,119 INFO L225 Difference]: With dead ends: 12480 [2021-06-12 22:02:37,119 INFO L226 Difference]: Without dead ends: 12480 [2021-06-12 22:02:37,119 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 416.7ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 22:02:37,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12480 states. [2021-06-12 22:02:37,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12480 to 6653. [2021-06-12 22:02:37,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6653 states, 6652 states have (on average 3.753607937462417) internal successors, (24969), 6652 states have internal predecessors, (24969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:37,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6653 states to 6653 states and 24969 transitions. [2021-06-12 22:02:37,273 INFO L78 Accepts]: Start accepts. Automaton has 6653 states and 24969 transitions. Word has length 28 [2021-06-12 22:02:37,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:37,273 INFO L482 AbstractCegarLoop]: Abstraction has 6653 states and 24969 transitions. [2021-06-12 22:02:37,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-12 22:02:37,273 INFO L276 IsEmpty]: Start isEmpty. Operand 6653 states and 24969 transitions. [2021-06-12 22:02:37,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:37,283 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:37,283 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:37,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3995,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:37,483 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:37,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:37,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1910896092, now seen corresponding path program 88 times [2021-06-12 22:02:37,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:37,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36517968] [2021-06-12 22:02:37,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:37,517 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:37,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:37,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36517968] [2021-06-12 22:02:37,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36517968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:37,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325716527] [2021-06-12 22:02:37,517 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:37,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:02:37,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:37,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:37,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:37,604 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:37,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325716527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:37,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:37,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-12 22:02:37,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914918895] [2021-06-12 22:02:37,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:02:37,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:37,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:02:37,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:02:37,605 INFO L87 Difference]: Start difference. First operand 6653 states and 24969 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2021-06-12 22:02:38,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:38,235 INFO L93 Difference]: Finished difference Result 12633 states and 43998 transitions. [2021-06-12 22:02:38,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 22:02:38,235 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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 [2021-06-12 22:02:38,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:38,257 INFO L225 Difference]: With dead ends: 12633 [2021-06-12 22:02:38,257 INFO L226 Difference]: Without dead ends: 12633 [2021-06-12 22:02:38,257 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 359.4ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 22:02:38,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12633 states. [2021-06-12 22:02:38,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12633 to 6881. [2021-06-12 22:02:38,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6881 states, 6880 states have (on average 3.734156976744186) internal successors, (25691), 6880 states have internal predecessors, (25691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:38,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6881 states to 6881 states and 25691 transitions. [2021-06-12 22:02:38,431 INFO L78 Accepts]: Start accepts. Automaton has 6881 states and 25691 transitions. Word has length 28 [2021-06-12 22:02:38,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:38,431 INFO L482 AbstractCegarLoop]: Abstraction has 6881 states and 25691 transitions. [2021-06-12 22:02:38,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2021-06-12 22:02:38,431 INFO L276 IsEmpty]: Start isEmpty. Operand 6881 states and 25691 transitions. [2021-06-12 22:02:38,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:38,440 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:38,440 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:38,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3996 [2021-06-12 22:02:38,640 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:38,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:38,640 INFO L82 PathProgramCache]: Analyzing trace with hash 827873436, now seen corresponding path program 89 times [2021-06-12 22:02:38,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:38,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957207339] [2021-06-12 22:02:38,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:38,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:38,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:38,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:38,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957207339] [2021-06-12 22:02:38,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957207339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:38,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255822893] [2021-06-12 22:02:38,668 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:38,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:02:38,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:38,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:02:38,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:38,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:38,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255822893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:38,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:38,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:02:38,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300241688] [2021-06-12 22:02:38,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:02:38,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:38,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:02:38,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:02:38,751 INFO L87 Difference]: Start difference. First operand 6881 states and 25691 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-06-12 22:02:39,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:39,116 INFO L93 Difference]: Finished difference Result 9357 states and 33618 transitions. [2021-06-12 22:02:39,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:02:39,117 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 [2021-06-12 22:02:39,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:39,132 INFO L225 Difference]: With dead ends: 9357 [2021-06-12 22:02:39,132 INFO L226 Difference]: Without dead ends: 9327 [2021-06-12 22:02:39,132 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 179.3ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:02:39,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9327 states. [2021-06-12 22:02:39,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9327 to 7728. [2021-06-12 22:02:39,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7728 states, 7727 states have (on average 3.760450368836547) internal successors, (29057), 7727 states have internal predecessors, (29057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:39,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7728 states to 7728 states and 29057 transitions. [2021-06-12 22:02:39,271 INFO L78 Accepts]: Start accepts. Automaton has 7728 states and 29057 transitions. Word has length 28 [2021-06-12 22:02:39,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:39,272 INFO L482 AbstractCegarLoop]: Abstraction has 7728 states and 29057 transitions. [2021-06-12 22:02:39,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-06-12 22:02:39,272 INFO L276 IsEmpty]: Start isEmpty. Operand 7728 states and 29057 transitions. [2021-06-12 22:02:39,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:39,282 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:39,283 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:39,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3997,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:39,483 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:39,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:39,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1996015742, now seen corresponding path program 90 times [2021-06-12 22:02:39,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:39,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635717603] [2021-06-12 22:02:39,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:39,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:39,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:02:39,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:39,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635717603] [2021-06-12 22:02:39,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635717603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:39,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837156864] [2021-06-12 22:02:39,559 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:39,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:02:39,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:39,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:02:39,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:39,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:02:39,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837156864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:39,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:39,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:02:39,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725195571] [2021-06-12 22:02:39,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:02:39,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:39,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:02:39,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:02:39,646 INFO L87 Difference]: Start difference. First operand 7728 states and 29057 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-06-12 22:02:39,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:39,991 INFO L93 Difference]: Finished difference Result 9961 states and 35609 transitions. [2021-06-12 22:02:39,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:02:39,991 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 [2021-06-12 22:02:39,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:40,008 INFO L225 Difference]: With dead ends: 9961 [2021-06-12 22:02:40,008 INFO L226 Difference]: Without dead ends: 9961 [2021-06-12 22:02:40,008 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 231.4ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:02:40,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9961 states. [2021-06-12 22:02:40,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9961 to 7768. [2021-06-12 22:02:40,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7768 states, 7767 states have (on average 3.756405304493369) internal successors, (29176), 7767 states have internal predecessors, (29176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:40,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7768 states to 7768 states and 29176 transitions. [2021-06-12 22:02:40,147 INFO L78 Accepts]: Start accepts. Automaton has 7768 states and 29176 transitions. Word has length 28 [2021-06-12 22:02:40,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:40,147 INFO L482 AbstractCegarLoop]: Abstraction has 7768 states and 29176 transitions. [2021-06-12 22:02:40,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-06-12 22:02:40,148 INFO L276 IsEmpty]: Start isEmpty. Operand 7768 states and 29176 transitions. [2021-06-12 22:02:40,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:40,158 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:40,158 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:40,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3998 [2021-06-12 22:02:40,361 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:40,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:40,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1866074950, now seen corresponding path program 91 times [2021-06-12 22:02:40,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:40,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480793378] [2021-06-12 22:02:40,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:40,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:40,401 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:02:40,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:40,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480793378] [2021-06-12 22:02:40,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480793378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:40,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812934807] [2021-06-12 22:02:40,402 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:40,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:40,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:40,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:02:40,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812934807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:40,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:40,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-12 22:02:40,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196710069] [2021-06-12 22:02:40,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:02:40,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:40,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:02:40,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:02:40,497 INFO L87 Difference]: Start difference. First operand 7768 states and 29176 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2021-06-12 22:02:41,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:41,121 INFO L93 Difference]: Finished difference Result 13358 states and 47391 transitions. [2021-06-12 22:02:41,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:02:41,122 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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 [2021-06-12 22:02:41,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:41,148 INFO L225 Difference]: With dead ends: 13358 [2021-06-12 22:02:41,148 INFO L226 Difference]: Without dead ends: 13354 [2021-06-12 22:02:41,148 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 350.6ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:02:41,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13354 states. [2021-06-12 22:02:41,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13354 to 7674. [2021-06-12 22:02:41,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7674 states, 7673 states have (on average 3.760328424345106) internal successors, (28853), 7673 states have internal predecessors, (28853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:41,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7674 states to 7674 states and 28853 transitions. [2021-06-12 22:02:41,356 INFO L78 Accepts]: Start accepts. Automaton has 7674 states and 28853 transitions. Word has length 28 [2021-06-12 22:02:41,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:41,356 INFO L482 AbstractCegarLoop]: Abstraction has 7674 states and 28853 transitions. [2021-06-12 22:02:41,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2021-06-12 22:02:41,356 INFO L276 IsEmpty]: Start isEmpty. Operand 7674 states and 28853 transitions. [2021-06-12 22:02:41,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:41,367 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:41,367 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:41,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3999,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:41,568 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:41,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:41,568 INFO L82 PathProgramCache]: Analyzing trace with hash 970254134, now seen corresponding path program 92 times [2021-06-12 22:02:41,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:41,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100873640] [2021-06-12 22:02:41,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:41,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:41,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:41,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100873640] [2021-06-12 22:02:41,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100873640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:41,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830720707] [2021-06-12 22:02:41,601 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:41,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:02:41,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:41,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:02:41,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:41,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:41,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830720707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:41,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:41,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:02:41,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142201456] [2021-06-12 22:02:41,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:02:41,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:41,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:02:41,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:02:41,687 INFO L87 Difference]: Start difference. First operand 7674 states and 28853 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-12 22:02:42,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:42,087 INFO L93 Difference]: Finished difference Result 10180 states and 36418 transitions. [2021-06-12 22:02:42,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:02:42,088 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 [2021-06-12 22:02:42,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:42,104 INFO L225 Difference]: With dead ends: 10180 [2021-06-12 22:02:42,104 INFO L226 Difference]: Without dead ends: 10180 [2021-06-12 22:02:42,105 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 227.9ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:02:42,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10180 states. [2021-06-12 22:02:42,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10180 to 7620. [2021-06-12 22:02:42,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7620 states, 7619 states have (on average 3.7531172069825436) internal successors, (28595), 7619 states have internal predecessors, (28595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:42,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7620 states to 7620 states and 28595 transitions. [2021-06-12 22:02:42,242 INFO L78 Accepts]: Start accepts. Automaton has 7620 states and 28595 transitions. Word has length 28 [2021-06-12 22:02:42,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:42,242 INFO L482 AbstractCegarLoop]: Abstraction has 7620 states and 28595 transitions. [2021-06-12 22:02:42,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-12 22:02:42,242 INFO L276 IsEmpty]: Start isEmpty. Operand 7620 states and 28595 transitions. [2021-06-12 22:02:42,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:42,253 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:42,253 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:42,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4000 [2021-06-12 22:02:42,453 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:42,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:42,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1831555688, now seen corresponding path program 93 times [2021-06-12 22:02:42,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:42,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631523544] [2021-06-12 22:02:42,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:42,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:42,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:42,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:42,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631523544] [2021-06-12 22:02:42,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631523544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:42,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704215072] [2021-06-12 22:02:42,541 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:42,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:02:42,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:42,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:42,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:42,622 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:42,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704215072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:42,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:42,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 22:02:42,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609757848] [2021-06-12 22:02:42,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:02:42,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:42,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:02:42,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:02:42,623 INFO L87 Difference]: Start difference. First operand 7620 states and 28595 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-12 22:02:43,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:43,272 INFO L93 Difference]: Finished difference Result 13241 states and 46888 transitions. [2021-06-12 22:02:43,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 22:02:43,272 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 [2021-06-12 22:02:43,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:43,295 INFO L225 Difference]: With dead ends: 13241 [2021-06-12 22:02:43,295 INFO L226 Difference]: Without dead ends: 13229 [2021-06-12 22:02:43,295 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 407.7ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:02:43,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13229 states. [2021-06-12 22:02:43,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13229 to 7620. [2021-06-12 22:02:43,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7620 states, 7619 states have (on average 3.7520672004200026) internal successors, (28587), 7619 states have internal predecessors, (28587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:43,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7620 states to 7620 states and 28587 transitions. [2021-06-12 22:02:43,463 INFO L78 Accepts]: Start accepts. Automaton has 7620 states and 28587 transitions. Word has length 28 [2021-06-12 22:02:43,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:43,463 INFO L482 AbstractCegarLoop]: Abstraction has 7620 states and 28587 transitions. [2021-06-12 22:02:43,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-12 22:02:43,463 INFO L276 IsEmpty]: Start isEmpty. Operand 7620 states and 28587 transitions. [2021-06-12 22:02:43,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:43,473 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:43,474 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:43,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4001 [2021-06-12 22:02:43,674 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:43,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:43,674 INFO L82 PathProgramCache]: Analyzing trace with hash 695130692, now seen corresponding path program 94 times [2021-06-12 22:02:43,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:43,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062251045] [2021-06-12 22:02:43,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:43,714 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:43,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:43,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062251045] [2021-06-12 22:02:43,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062251045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:43,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601836897] [2021-06-12 22:02:43,714 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:43,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:02:43,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:43,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:43,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:43,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:43,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601836897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:43,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:43,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:02:43,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952174573] [2021-06-12 22:02:43,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:02:43,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:43,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:02:43,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:02:43,811 INFO L87 Difference]: Start difference. First operand 7620 states and 28587 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:44,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:44,949 INFO L93 Difference]: Finished difference Result 20083 states and 70057 transitions. [2021-06-12 22:02:44,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-12 22:02:44,949 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:02:44,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:44,998 INFO L225 Difference]: With dead ends: 20083 [2021-06-12 22:02:44,998 INFO L226 Difference]: Without dead ends: 20083 [2021-06-12 22:02:44,999 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 690.8ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 22:02:45,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20083 states. [2021-06-12 22:02:45,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20083 to 10419. [2021-06-12 22:02:45,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10419 states, 10418 states have (on average 3.7977538875023997) internal successors, (39565), 10418 states have internal predecessors, (39565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:45,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10419 states to 10419 states and 39565 transitions. [2021-06-12 22:02:45,297 INFO L78 Accepts]: Start accepts. Automaton has 10419 states and 39565 transitions. Word has length 28 [2021-06-12 22:02:45,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:45,297 INFO L482 AbstractCegarLoop]: Abstraction has 10419 states and 39565 transitions. [2021-06-12 22:02:45,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:45,297 INFO L276 IsEmpty]: Start isEmpty. Operand 10419 states and 39565 transitions. [2021-06-12 22:02:45,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:45,311 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:45,311 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:45,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4002 [2021-06-12 22:02:45,512 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:45,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:45,512 INFO L82 PathProgramCache]: Analyzing trace with hash 776506780, now seen corresponding path program 95 times [2021-06-12 22:02:45,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:45,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025464407] [2021-06-12 22:02:45,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:45,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:45,551 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:45,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:45,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025464407] [2021-06-12 22:02:45,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025464407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:45,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758584659] [2021-06-12 22:02:45,551 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:45,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:02:45,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:45,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:45,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:45,697 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:45,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758584659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:45,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:45,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:02:45,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559754652] [2021-06-12 22:02:45,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:02:45,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:45,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:02:45,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:02:45,698 INFO L87 Difference]: Start difference. First operand 10419 states and 39565 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:46,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:46,728 INFO L93 Difference]: Finished difference Result 19333 states and 68102 transitions. [2021-06-12 22:02:46,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 22:02:46,728 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:02:46,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:46,764 INFO L225 Difference]: With dead ends: 19333 [2021-06-12 22:02:46,764 INFO L226 Difference]: Without dead ends: 19321 [2021-06-12 22:02:46,765 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 589.2ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 22:02:46,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19321 states. [2021-06-12 22:02:47,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19321 to 10233. [2021-06-12 22:02:47,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10233 states, 10232 states have (on average 3.8045347928068804) internal successors, (38928), 10232 states have internal predecessors, (38928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:47,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10233 states to 10233 states and 38928 transitions. [2021-06-12 22:02:47,111 INFO L78 Accepts]: Start accepts. Automaton has 10233 states and 38928 transitions. Word has length 28 [2021-06-12 22:02:47,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:47,111 INFO L482 AbstractCegarLoop]: Abstraction has 10233 states and 38928 transitions. [2021-06-12 22:02:47,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:47,111 INFO L276 IsEmpty]: Start isEmpty. Operand 10233 states and 38928 transitions. [2021-06-12 22:02:47,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:47,126 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:47,126 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:47,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4003,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:47,327 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:47,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:47,327 INFO L82 PathProgramCache]: Analyzing trace with hash -738585192, now seen corresponding path program 96 times [2021-06-12 22:02:47,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:47,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825831511] [2021-06-12 22:02:47,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:47,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:47,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:47,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825831511] [2021-06-12 22:02:47,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825831511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:47,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785155189] [2021-06-12 22:02:47,367 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:47,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:02:47,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:47,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:47,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:47,457 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:47,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785155189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:47,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:47,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:02:47,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959194111] [2021-06-12 22:02:47,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:02:47,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:47,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:02:47,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:02:47,458 INFO L87 Difference]: Start difference. First operand 10233 states and 38928 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:48,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:48,430 INFO L93 Difference]: Finished difference Result 19147 states and 67441 transitions. [2021-06-12 22:02:48,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 22:02:48,431 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:02:48,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:48,466 INFO L225 Difference]: With dead ends: 19147 [2021-06-12 22:02:48,466 INFO L226 Difference]: Without dead ends: 19111 [2021-06-12 22:02:48,467 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 559.7ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 22:02:48,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19111 states. [2021-06-12 22:02:48,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19111 to 10277. [2021-06-12 22:02:48,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10277 states, 10276 states have (on average 3.802646944336318) internal successors, (39076), 10276 states have internal predecessors, (39076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:48,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10277 states to 10277 states and 39076 transitions. [2021-06-12 22:02:48,816 INFO L78 Accepts]: Start accepts. Automaton has 10277 states and 39076 transitions. Word has length 28 [2021-06-12 22:02:48,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:48,816 INFO L482 AbstractCegarLoop]: Abstraction has 10277 states and 39076 transitions. [2021-06-12 22:02:48,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:48,816 INFO L276 IsEmpty]: Start isEmpty. Operand 10277 states and 39076 transitions. [2021-06-12 22:02:48,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:48,831 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:48,831 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:49,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4004,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:49,032 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:49,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:49,032 INFO L82 PathProgramCache]: Analyzing trace with hash 858541524, now seen corresponding path program 97 times [2021-06-12 22:02:49,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:49,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591592777] [2021-06-12 22:02:49,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:49,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:49,077 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:49,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:49,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591592777] [2021-06-12 22:02:49,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591592777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:49,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615564335] [2021-06-12 22:02:49,077 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:49,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:49,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:49,207 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:49,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615564335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:49,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:49,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 22:02:49,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157762236] [2021-06-12 22:02:49,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:02:49,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:49,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:02:49,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:02:49,208 INFO L87 Difference]: Start difference. First operand 10277 states and 39076 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:50,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:50,688 INFO L93 Difference]: Finished difference Result 19074 states and 67295 transitions. [2021-06-12 22:02:50,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-12 22:02:50,688 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:02:50,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:50,723 INFO L225 Difference]: With dead ends: 19074 [2021-06-12 22:02:50,723 INFO L226 Difference]: Without dead ends: 19074 [2021-06-12 22:02:50,724 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 891.8ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 22:02:50,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19074 states. [2021-06-12 22:02:50,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19074 to 10473. [2021-06-12 22:02:50,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10473 states, 10472 states have (on average 3.793544690603514) internal successors, (39726), 10472 states have internal predecessors, (39726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:51,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10473 states to 10473 states and 39726 transitions. [2021-06-12 22:02:51,098 INFO L78 Accepts]: Start accepts. Automaton has 10473 states and 39726 transitions. Word has length 28 [2021-06-12 22:02:51,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:51,098 INFO L482 AbstractCegarLoop]: Abstraction has 10473 states and 39726 transitions. [2021-06-12 22:02:51,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:51,098 INFO L276 IsEmpty]: Start isEmpty. Operand 10473 states and 39726 transitions. [2021-06-12 22:02:51,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:51,194 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:51,194 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:51,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4005,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:51,395 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:51,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:51,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1793386618, now seen corresponding path program 98 times [2021-06-12 22:02:51,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:51,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016680313] [2021-06-12 22:02:51,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:51,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:51,434 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:51,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:51,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016680313] [2021-06-12 22:02:51,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016680313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:51,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331750748] [2021-06-12 22:02:51,435 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:51,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:02:51,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:51,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:51,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:51,566 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:51,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331750748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:51,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:51,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 22:02:51,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879125546] [2021-06-12 22:02:51,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:02:51,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:51,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:02:51,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:02:51,568 INFO L87 Difference]: Start difference. First operand 10473 states and 39726 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:52,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:52,900 INFO L93 Difference]: Finished difference Result 18684 states and 66217 transitions. [2021-06-12 22:02:52,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 22:02:52,900 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:02:52,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:52,939 INFO L225 Difference]: With dead ends: 18684 [2021-06-12 22:02:52,939 INFO L226 Difference]: Without dead ends: 18672 [2021-06-12 22:02:52,940 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 800.7ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 22:02:52,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18672 states. [2021-06-12 22:02:53,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18672 to 10355. [2021-06-12 22:02:53,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10355 states, 10354 states have (on average 3.7980490631639947) internal successors, (39325), 10354 states have internal predecessors, (39325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:53,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10355 states to 10355 states and 39325 transitions. [2021-06-12 22:02:53,265 INFO L78 Accepts]: Start accepts. Automaton has 10355 states and 39325 transitions. Word has length 28 [2021-06-12 22:02:53,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:53,265 INFO L482 AbstractCegarLoop]: Abstraction has 10355 states and 39325 transitions. [2021-06-12 22:02:53,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:53,265 INFO L276 IsEmpty]: Start isEmpty. Operand 10355 states and 39325 transitions. [2021-06-12 22:02:53,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:53,281 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:53,281 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:53,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4006 [2021-06-12 22:02:53,482 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:53,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:53,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1234123500, now seen corresponding path program 99 times [2021-06-12 22:02:53,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:53,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099499529] [2021-06-12 22:02:53,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:53,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:53,526 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:53,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:53,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099499529] [2021-06-12 22:02:53,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099499529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:53,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497866819] [2021-06-12 22:02:53,527 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:53,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:02:53,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:53,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:53,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:53,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:53,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497866819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:53,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:53,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-12 22:02:53,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603796152] [2021-06-12 22:02:53,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:02:53,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:53,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:02:53,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:02:53,683 INFO L87 Difference]: Start difference. First operand 10355 states and 39325 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:54,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:54,754 INFO L93 Difference]: Finished difference Result 17924 states and 64133 transitions. [2021-06-12 22:02:54,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 22:02:54,754 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:02:54,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:54,789 INFO L225 Difference]: With dead ends: 17924 [2021-06-12 22:02:54,789 INFO L226 Difference]: Without dead ends: 17888 [2021-06-12 22:02:54,789 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 601.1ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 22:02:54,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17888 states. [2021-06-12 22:02:55,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17888 to 10379. [2021-06-12 22:02:55,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10379 states, 10378 states have (on average 3.7969743688571977) internal successors, (39405), 10378 states have internal predecessors, (39405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:55,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10379 states to 10379 states and 39405 transitions. [2021-06-12 22:02:55,096 INFO L78 Accepts]: Start accepts. Automaton has 10379 states and 39405 transitions. Word has length 28 [2021-06-12 22:02:55,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:55,096 INFO L482 AbstractCegarLoop]: Abstraction has 10379 states and 39405 transitions. [2021-06-12 22:02:55,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:55,096 INFO L276 IsEmpty]: Start isEmpty. Operand 10379 states and 39405 transitions. [2021-06-12 22:02:55,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:55,110 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:55,110 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:55,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4007,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:55,310 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:55,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:55,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1584729920, now seen corresponding path program 100 times [2021-06-12 22:02:55,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:55,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498676996] [2021-06-12 22:02:55,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:02:55,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:55,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498676996] [2021-06-12 22:02:55,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498676996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:55,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739172964] [2021-06-12 22:02:55,346 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:55,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:02:55,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:55,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:55,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:55,474 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:55,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739172964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:55,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:55,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:02:55,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793499241] [2021-06-12 22:02:55,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:02:55,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:55,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:02:55,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:02:55,475 INFO L87 Difference]: Start difference. First operand 10379 states and 39405 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:56,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:56,825 INFO L93 Difference]: Finished difference Result 26041 states and 92685 transitions. [2021-06-12 22:02:56,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-12 22:02:56,826 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:02:56,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:56,877 INFO L225 Difference]: With dead ends: 26041 [2021-06-12 22:02:56,877 INFO L226 Difference]: Without dead ends: 26041 [2021-06-12 22:02:56,878 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 766.9ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 22:02:56,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26041 states. [2021-06-12 22:02:57,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26041 to 10669. [2021-06-12 22:02:57,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10669 states, 10668 states have (on average 3.8225534308211473) internal successors, (40779), 10668 states have internal predecessors, (40779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:57,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10669 states to 10669 states and 40779 transitions. [2021-06-12 22:02:57,186 INFO L78 Accepts]: Start accepts. Automaton has 10669 states and 40779 transitions. Word has length 28 [2021-06-12 22:02:57,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:57,186 INFO L482 AbstractCegarLoop]: Abstraction has 10669 states and 40779 transitions. [2021-06-12 22:02:57,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:57,186 INFO L276 IsEmpty]: Start isEmpty. Operand 10669 states and 40779 transitions. [2021-06-12 22:02:57,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:57,201 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:57,201 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:57,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4008 [2021-06-12 22:02:57,402 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:57,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:57,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1017777840, now seen corresponding path program 101 times [2021-06-12 22:02:57,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:57,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577764585] [2021-06-12 22:02:57,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:57,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:57,441 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:02:57,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:57,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577764585] [2021-06-12 22:02:57,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577764585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:57,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951153683] [2021-06-12 22:02:57,441 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:57,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:02:57,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:57,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:57,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:57,568 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:57,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951153683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:57,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:57,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:02:57,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674983238] [2021-06-12 22:02:57,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:02:57,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:57,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:02:57,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:02:57,569 INFO L87 Difference]: Start difference. First operand 10669 states and 40779 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:58,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:02:58,845 INFO L93 Difference]: Finished difference Result 25481 states and 91317 transitions. [2021-06-12 22:02:58,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-12 22:02:58,845 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:02:58,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:02:58,897 INFO L225 Difference]: With dead ends: 25481 [2021-06-12 22:02:58,897 INFO L226 Difference]: Without dead ends: 25481 [2021-06-12 22:02:58,898 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 744.5ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 22:02:58,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25481 states. [2021-06-12 22:02:59,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25481 to 10571. [2021-06-12 22:02:59,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10571 states, 10570 states have (on average 3.809744560075686) internal successors, (40269), 10570 states have internal predecessors, (40269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:59,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10571 states to 10571 states and 40269 transitions. [2021-06-12 22:02:59,209 INFO L78 Accepts]: Start accepts. Automaton has 10571 states and 40269 transitions. Word has length 28 [2021-06-12 22:02:59,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:02:59,209 INFO L482 AbstractCegarLoop]: Abstraction has 10571 states and 40269 transitions. [2021-06-12 22:02:59,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:02:59,209 INFO L276 IsEmpty]: Start isEmpty. Operand 10571 states and 40269 transitions. [2021-06-12 22:02:59,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:02:59,224 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:02:59,224 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:02:59,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4009,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:59,424 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:02:59,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:02:59,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1216329654, now seen corresponding path program 102 times [2021-06-12 22:02:59,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:02:59,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274050519] [2021-06-12 22:02:59,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:02:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:02:59,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:02:59,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:02:59,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274050519] [2021-06-12 22:02:59,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274050519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:59,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206856803] [2021-06-12 22:02:59,459 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:02:59,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:02:59,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:02:59,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:02:59,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:02:59,582 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:02:59,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206856803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:02:59,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:02:59,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:02:59,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367978544] [2021-06-12 22:02:59,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:02:59,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:02:59,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:02:59,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:02:59,583 INFO L87 Difference]: Start difference. First operand 10571 states and 40269 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:00,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:00,466 INFO L93 Difference]: Finished difference Result 20226 states and 72726 transitions. [2021-06-12 22:03:00,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 22:03:00,466 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:00,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:00,506 INFO L225 Difference]: With dead ends: 20226 [2021-06-12 22:03:00,506 INFO L226 Difference]: Without dead ends: 20226 [2021-06-12 22:03:00,506 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 496.3ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 22:03:00,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20226 states. [2021-06-12 22:03:00,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20226 to 10580. [2021-06-12 22:03:00,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10580 states, 10579 states have (on average 3.8086775687683145) internal successors, (40292), 10579 states have internal predecessors, (40292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:00,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10580 states to 10580 states and 40292 transitions. [2021-06-12 22:03:00,763 INFO L78 Accepts]: Start accepts. Automaton has 10580 states and 40292 transitions. Word has length 28 [2021-06-12 22:03:00,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:00,763 INFO L482 AbstractCegarLoop]: Abstraction has 10580 states and 40292 transitions. [2021-06-12 22:03:00,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:00,764 INFO L276 IsEmpty]: Start isEmpty. Operand 10580 states and 40292 transitions. [2021-06-12 22:03:00,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:00,779 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:00,779 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:00,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4010 [2021-06-12 22:03:00,979 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:00,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:00,980 INFO L82 PathProgramCache]: Analyzing trace with hash 541607776, now seen corresponding path program 103 times [2021-06-12 22:03:00,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:00,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671144459] [2021-06-12 22:03:00,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:00,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:01,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:03:01,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:01,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671144459] [2021-06-12 22:03:01,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671144459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:01,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729466692] [2021-06-12 22:03:01,015 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:01,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:01,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:01,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:01,131 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:01,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729466692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:01,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:01,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:03:01,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085455012] [2021-06-12 22:03:01,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:03:01,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:01,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:03:01,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:03:01,132 INFO L87 Difference]: Start difference. First operand 10580 states and 40292 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:01,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:01,922 INFO L93 Difference]: Finished difference Result 18775 states and 68086 transitions. [2021-06-12 22:03:01,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 22:03:01,922 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:01,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:01,958 INFO L225 Difference]: With dead ends: 18775 [2021-06-12 22:03:01,959 INFO L226 Difference]: Without dead ends: 18775 [2021-06-12 22:03:01,959 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 427.6ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 22:03:01,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18775 states. [2021-06-12 22:03:02,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18775 to 10592. [2021-06-12 22:03:02,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10592 states, 10591 states have (on average 3.807950146350675) internal successors, (40330), 10591 states have internal predecessors, (40330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:02,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10592 states to 10592 states and 40330 transitions. [2021-06-12 22:03:02,220 INFO L78 Accepts]: Start accepts. Automaton has 10592 states and 40330 transitions. Word has length 28 [2021-06-12 22:03:02,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:02,220 INFO L482 AbstractCegarLoop]: Abstraction has 10592 states and 40330 transitions. [2021-06-12 22:03:02,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:02,220 INFO L276 IsEmpty]: Start isEmpty. Operand 10592 states and 40330 transitions. [2021-06-12 22:03:02,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:02,236 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:02,236 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:02,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4011 [2021-06-12 22:03:02,436 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:02,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:02,436 INFO L82 PathProgramCache]: Analyzing trace with hash -2099999344, now seen corresponding path program 104 times [2021-06-12 22:03:02,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:02,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105574535] [2021-06-12 22:03:02,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:02,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:02,471 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:03:02,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:02,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105574535] [2021-06-12 22:03:02,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105574535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:02,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896060783] [2021-06-12 22:03:02,471 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:02,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:03:02,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:02,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:02,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:02,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896060783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:02,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:02,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:03:02,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073444486] [2021-06-12 22:03:02,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:03:02,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:02,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:03:02,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:03:02,598 INFO L87 Difference]: Start difference. First operand 10592 states and 40330 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:03,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:03,717 INFO L93 Difference]: Finished difference Result 19382 states and 69829 transitions. [2021-06-12 22:03:03,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 22:03:03,718 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:03,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:03,754 INFO L225 Difference]: With dead ends: 19382 [2021-06-12 22:03:03,754 INFO L226 Difference]: Without dead ends: 19382 [2021-06-12 22:03:03,755 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 684.0ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 22:03:03,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19382 states. [2021-06-12 22:03:03,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19382 to 10700. [2021-06-12 22:03:03,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10700 states, 10699 states have (on average 3.800729040097205) internal successors, (40664), 10699 states have internal predecessors, (40664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:04,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10700 states to 10700 states and 40664 transitions. [2021-06-12 22:03:04,013 INFO L78 Accepts]: Start accepts. Automaton has 10700 states and 40664 transitions. Word has length 28 [2021-06-12 22:03:04,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:04,013 INFO L482 AbstractCegarLoop]: Abstraction has 10700 states and 40664 transitions. [2021-06-12 22:03:04,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:04,013 INFO L276 IsEmpty]: Start isEmpty. Operand 10700 states and 40664 transitions. [2021-06-12 22:03:04,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:04,028 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:04,028 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:04,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4012 [2021-06-12 22:03:04,229 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:04,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:04,229 INFO L82 PathProgramCache]: Analyzing trace with hash -456960190, now seen corresponding path program 105 times [2021-06-12 22:03:04,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:04,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825813445] [2021-06-12 22:03:04,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:04,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:04,263 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:03:04,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:04,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825813445] [2021-06-12 22:03:04,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825813445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:04,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088721763] [2021-06-12 22:03:04,264 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:04,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:03:04,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:04,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:04,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:04,386 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:04,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088721763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:04,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:04,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:03:04,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341822729] [2021-06-12 22:03:04,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:03:04,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:04,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:03:04,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:03:04,387 INFO L87 Difference]: Start difference. First operand 10700 states and 40664 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:05,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:05,341 INFO L93 Difference]: Finished difference Result 18954 states and 68665 transitions. [2021-06-12 22:03:05,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 22:03:05,342 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:05,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:05,379 INFO L225 Difference]: With dead ends: 18954 [2021-06-12 22:03:05,379 INFO L226 Difference]: Without dead ends: 18950 [2021-06-12 22:03:05,379 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 581.2ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:03:05,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18950 states. [2021-06-12 22:03:05,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18950 to 10626. [2021-06-12 22:03:05,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10626 states, 10625 states have (on average 3.804705882352941) internal successors, (40425), 10625 states have internal predecessors, (40425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:05,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10626 states to 10626 states and 40425 transitions. [2021-06-12 22:03:05,699 INFO L78 Accepts]: Start accepts. Automaton has 10626 states and 40425 transitions. Word has length 28 [2021-06-12 22:03:05,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:05,699 INFO L482 AbstractCegarLoop]: Abstraction has 10626 states and 40425 transitions. [2021-06-12 22:03:05,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:05,699 INFO L276 IsEmpty]: Start isEmpty. Operand 10626 states and 40425 transitions. [2021-06-12 22:03:05,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:05,714 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:05,714 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:05,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4013 [2021-06-12 22:03:05,914 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:05,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:05,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1748478926, now seen corresponding path program 106 times [2021-06-12 22:03:05,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:05,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109543100] [2021-06-12 22:03:05,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:05,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:05,954 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:05,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:05,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109543100] [2021-06-12 22:03:05,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109543100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:05,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068425531] [2021-06-12 22:03:05,955 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:05,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:03:05,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:05,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:05,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:06,072 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:06,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068425531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:06,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:06,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:03:06,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971538916] [2021-06-12 22:03:06,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:03:06,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:06,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:03:06,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:03:06,073 INFO L87 Difference]: Start difference. First operand 10626 states and 40425 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:07,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:07,136 INFO L93 Difference]: Finished difference Result 18381 states and 66150 transitions. [2021-06-12 22:03:07,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 22:03:07,136 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:07,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:07,170 INFO L225 Difference]: With dead ends: 18381 [2021-06-12 22:03:07,171 INFO L226 Difference]: Without dead ends: 18381 [2021-06-12 22:03:07,171 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 661.7ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 22:03:07,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18381 states. [2021-06-12 22:03:07,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18381 to 10853. [2021-06-12 22:03:07,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10853 states, 10852 states have (on average 3.807869517139698) internal successors, (41323), 10852 states have internal predecessors, (41323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:07,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10853 states to 10853 states and 41323 transitions. [2021-06-12 22:03:07,434 INFO L78 Accepts]: Start accepts. Automaton has 10853 states and 41323 transitions. Word has length 28 [2021-06-12 22:03:07,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:07,434 INFO L482 AbstractCegarLoop]: Abstraction has 10853 states and 41323 transitions. [2021-06-12 22:03:07,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:07,435 INFO L276 IsEmpty]: Start isEmpty. Operand 10853 states and 41323 transitions. [2021-06-12 22:03:07,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:07,450 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:07,450 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:07,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4014,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:07,651 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:07,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:07,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1366168690, now seen corresponding path program 107 times [2021-06-12 22:03:07,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:07,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202611799] [2021-06-12 22:03:07,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:07,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:07,691 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:07,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:07,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202611799] [2021-06-12 22:03:07,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202611799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:07,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677920426] [2021-06-12 22:03:07,692 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:07,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 22:03:07,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:07,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:07,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:07,806 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:07,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677920426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:07,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:07,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:03:07,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633157775] [2021-06-12 22:03:07,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:03:07,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:07,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:03:07,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:03:07,806 INFO L87 Difference]: Start difference. First operand 10853 states and 41323 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:08,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:08,838 INFO L93 Difference]: Finished difference Result 18091 states and 65344 transitions. [2021-06-12 22:03:08,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 22:03:08,839 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:08,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:08,876 INFO L225 Difference]: With dead ends: 18091 [2021-06-12 22:03:08,876 INFO L226 Difference]: Without dead ends: 18079 [2021-06-12 22:03:08,876 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 622.0ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 22:03:08,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18079 states. [2021-06-12 22:03:09,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18079 to 10955. [2021-06-12 22:03:09,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10955 states, 10954 states have (on average 3.8018988497352564) internal successors, (41646), 10954 states have internal predecessors, (41646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:09,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10955 states to 10955 states and 41646 transitions. [2021-06-12 22:03:09,166 INFO L78 Accepts]: Start accepts. Automaton has 10955 states and 41646 transitions. Word has length 28 [2021-06-12 22:03:09,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:09,167 INFO L482 AbstractCegarLoop]: Abstraction has 10955 states and 41646 transitions. [2021-06-12 22:03:09,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:09,167 INFO L276 IsEmpty]: Start isEmpty. Operand 10955 states and 41646 transitions. [2021-06-12 22:03:09,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:09,182 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:09,182 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:09,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4015,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:09,383 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:09,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:09,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1561241668, now seen corresponding path program 71 times [2021-06-12 22:03:09,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:09,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855634560] [2021-06-12 22:03:09,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:09,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:09,424 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:09,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:09,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855634560] [2021-06-12 22:03:09,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855634560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:09,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547460869] [2021-06-12 22:03:09,424 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:09,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:03:09,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:09,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:09,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:09,513 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:09,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547460869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:09,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:09,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 22:03:09,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024528901] [2021-06-12 22:03:09,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:03:09,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:09,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:03:09,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:03:09,513 INFO L87 Difference]: Start difference. First operand 10955 states and 41646 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-12 22:03:09,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:09,976 INFO L93 Difference]: Finished difference Result 15599 states and 57718 transitions. [2021-06-12 22:03:09,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:03:09,977 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 [2021-06-12 22:03:09,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:10,006 INFO L225 Difference]: With dead ends: 15599 [2021-06-12 22:03:10,006 INFO L226 Difference]: Without dead ends: 15599 [2021-06-12 22:03:10,007 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 252.3ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:03:10,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15599 states. [2021-06-12 22:03:10,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15599 to 11027. [2021-06-12 22:03:10,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11027 states, 11026 states have (on average 3.7972066025757303) internal successors, (41868), 11026 states have internal predecessors, (41868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:10,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11027 states to 11027 states and 41868 transitions. [2021-06-12 22:03:10,237 INFO L78 Accepts]: Start accepts. Automaton has 11027 states and 41868 transitions. Word has length 28 [2021-06-12 22:03:10,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:10,237 INFO L482 AbstractCegarLoop]: Abstraction has 11027 states and 41868 transitions. [2021-06-12 22:03:10,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-12 22:03:10,237 INFO L276 IsEmpty]: Start isEmpty. Operand 11027 states and 41868 transitions. [2021-06-12 22:03:10,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:10,253 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:10,253 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:10,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4016,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:10,454 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:10,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:10,454 INFO L82 PathProgramCache]: Analyzing trace with hash 963219036, now seen corresponding path program 72 times [2021-06-12 22:03:10,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:10,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193942836] [2021-06-12 22:03:10,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:10,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:10,489 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:10,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:10,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193942836] [2021-06-12 22:03:10,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193942836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:10,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116448670] [2021-06-12 22:03:10,489 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:10,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:03:10,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:10,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:10,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:10,578 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:10,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116448670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:10,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:10,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:03:10,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074330726] [2021-06-12 22:03:10,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:03:10,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:10,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:03:10,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:03:10,579 INFO L87 Difference]: Start difference. First operand 11027 states and 41868 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-12 22:03:11,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:11,104 INFO L93 Difference]: Finished difference Result 16567 states and 60532 transitions. [2021-06-12 22:03:11,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 22:03:11,105 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 [2021-06-12 22:03:11,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:11,138 INFO L225 Difference]: With dead ends: 16567 [2021-06-12 22:03:11,138 INFO L226 Difference]: Without dead ends: 16567 [2021-06-12 22:03:11,138 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 297.4ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 22:03:11,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16567 states. [2021-06-12 22:03:11,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16567 to 11355. [2021-06-12 22:03:11,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11355 states, 11354 states have (on average 3.779284833538841) internal successors, (42910), 11354 states have internal predecessors, (42910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:11,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11355 states to 11355 states and 42910 transitions. [2021-06-12 22:03:11,445 INFO L78 Accepts]: Start accepts. Automaton has 11355 states and 42910 transitions. Word has length 28 [2021-06-12 22:03:11,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:11,445 INFO L482 AbstractCegarLoop]: Abstraction has 11355 states and 42910 transitions. [2021-06-12 22:03:11,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-12 22:03:11,445 INFO L276 IsEmpty]: Start isEmpty. Operand 11355 states and 42910 transitions. [2021-06-12 22:03:11,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:11,461 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:11,461 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:11,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4017,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:11,662 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:11,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:11,662 INFO L82 PathProgramCache]: Analyzing trace with hash -119803620, now seen corresponding path program 73 times [2021-06-12 22:03:11,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:11,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748938179] [2021-06-12 22:03:11,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:11,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:11,695 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:11,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:11,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748938179] [2021-06-12 22:03:11,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748938179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:11,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176725080] [2021-06-12 22:03:11,696 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:11,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:11,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:11,815 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:11,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176725080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:11,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:11,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-12 22:03:11,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076115940] [2021-06-12 22:03:11,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:03:11,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:11,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:03:11,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:03:11,816 INFO L87 Difference]: Start difference. First operand 11355 states and 42910 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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) [2021-06-12 22:03:12,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:12,322 INFO L93 Difference]: Finished difference Result 16375 states and 60421 transitions. [2021-06-12 22:03:12,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:03:12,322 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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 28 [2021-06-12 22:03:12,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:12,356 INFO L225 Difference]: With dead ends: 16375 [2021-06-12 22:03:12,356 INFO L226 Difference]: Without dead ends: 16331 [2021-06-12 22:03:12,356 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 315.0ms TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:03:12,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16331 states. [2021-06-12 22:03:12,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16331 to 13242. [2021-06-12 22:03:12,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13242 states, 13241 states have (on average 3.819726606751756) internal successors, (50577), 13241 states have internal predecessors, (50577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:12,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13242 states to 13242 states and 50577 transitions. [2021-06-12 22:03:12,630 INFO L78 Accepts]: Start accepts. Automaton has 13242 states and 50577 transitions. Word has length 28 [2021-06-12 22:03:12,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:12,630 INFO L482 AbstractCegarLoop]: Abstraction has 13242 states and 50577 transitions. [2021-06-12 22:03:12,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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) [2021-06-12 22:03:12,630 INFO L276 IsEmpty]: Start isEmpty. Operand 13242 states and 50577 transitions. [2021-06-12 22:03:12,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:12,651 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:12,651 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:12,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4018,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:12,851 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:12,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:12,852 INFO L82 PathProgramCache]: Analyzing trace with hash 918397894, now seen corresponding path program 74 times [2021-06-12 22:03:12,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:12,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663900167] [2021-06-12 22:03:12,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:12,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:12,892 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:03:12,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:12,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663900167] [2021-06-12 22:03:12,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663900167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:12,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124950190] [2021-06-12 22:03:12,892 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:12,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:03:12,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:12,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:12,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:12,973 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:03:12,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124950190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:12,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:12,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:03:12,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368698745] [2021-06-12 22:03:12,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:03:12,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:12,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:03:12,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:03:12,974 INFO L87 Difference]: Start difference. First operand 13242 states and 50577 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-12 22:03:13,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:13,402 INFO L93 Difference]: Finished difference Result 18146 states and 67670 transitions. [2021-06-12 22:03:13,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 22:03:13,402 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 [2021-06-12 22:03:13,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:13,437 INFO L225 Difference]: With dead ends: 18146 [2021-06-12 22:03:13,437 INFO L226 Difference]: Without dead ends: 18138 [2021-06-12 22:03:13,437 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 225.9ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:03:13,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18138 states. [2021-06-12 22:03:13,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18138 to 13160. [2021-06-12 22:03:13,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13160 states, 13159 states have (on average 3.8226308990044835) internal successors, (50302), 13159 states have internal predecessors, (50302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:13,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13160 states to 13160 states and 50302 transitions. [2021-06-12 22:03:13,709 INFO L78 Accepts]: Start accepts. Automaton has 13160 states and 50302 transitions. Word has length 28 [2021-06-12 22:03:13,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:13,709 INFO L482 AbstractCegarLoop]: Abstraction has 13160 states and 50302 transitions. [2021-06-12 22:03:13,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-12 22:03:13,709 INFO L276 IsEmpty]: Start isEmpty. Operand 13160 states and 50302 transitions. [2021-06-12 22:03:13,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:13,728 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:13,729 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:13,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4019,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:13,929 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:13,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:13,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1515734552, now seen corresponding path program 75 times [2021-06-12 22:03:13,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:13,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309569991] [2021-06-12 22:03:13,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:13,969 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:13,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:13,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309569991] [2021-06-12 22:03:13,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309569991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:13,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016050798] [2021-06-12 22:03:13,970 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:13,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:03:13,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:13,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:13,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:14,052 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:14,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016050798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:14,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:14,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 22:03:14,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648673248] [2021-06-12 22:03:14,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:03:14,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:14,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:03:14,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:03:14,053 INFO L87 Difference]: Start difference. First operand 13160 states and 50302 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-12 22:03:14,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:14,552 INFO L93 Difference]: Finished difference Result 18024 states and 67311 transitions. [2021-06-12 22:03:14,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:03:14,552 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 [2021-06-12 22:03:14,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:14,587 INFO L225 Difference]: With dead ends: 18024 [2021-06-12 22:03:14,587 INFO L226 Difference]: Without dead ends: 18012 [2021-06-12 22:03:14,587 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 241.9ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:03:14,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18012 states. [2021-06-12 22:03:14,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18012 to 13126. [2021-06-12 22:03:14,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13126 states, 13125 states have (on average 3.8246857142857142) internal successors, (50199), 13125 states have internal predecessors, (50199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:14,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13126 states to 13126 states and 50199 transitions. [2021-06-12 22:03:14,856 INFO L78 Accepts]: Start accepts. Automaton has 13126 states and 50199 transitions. Word has length 28 [2021-06-12 22:03:14,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:14,856 INFO L482 AbstractCegarLoop]: Abstraction has 13126 states and 50199 transitions. [2021-06-12 22:03:14,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-12 22:03:14,856 INFO L276 IsEmpty]: Start isEmpty. Operand 13126 states and 50199 transitions. [2021-06-12 22:03:14,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:14,876 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:14,876 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:15,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4020 [2021-06-12 22:03:15,076 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:15,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:15,077 INFO L82 PathProgramCache]: Analyzing trace with hash 860325080, now seen corresponding path program 76 times [2021-06-12 22:03:15,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:15,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253477605] [2021-06-12 22:03:15,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:15,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:15,111 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:03:15,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:15,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253477605] [2021-06-12 22:03:15,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253477605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:15,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367808985] [2021-06-12 22:03:15,111 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:15,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:03:15,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:15,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:15,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:15,229 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:15,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367808985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:15,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:15,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:03:15,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170634449] [2021-06-12 22:03:15,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:03:15,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:15,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:03:15,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:03:15,230 INFO L87 Difference]: Start difference. First operand 13126 states and 50199 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 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) [2021-06-12 22:03:16,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:16,177 INFO L93 Difference]: Finished difference Result 24612 states and 88773 transitions. [2021-06-12 22:03:16,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:03:16,178 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 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 28 [2021-06-12 22:03:16,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:16,227 INFO L225 Difference]: With dead ends: 24612 [2021-06-12 22:03:16,227 INFO L226 Difference]: Without dead ends: 24612 [2021-06-12 22:03:16,228 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 509.9ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:03:16,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24612 states. [2021-06-12 22:03:16,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24612 to 13108. [2021-06-12 22:03:16,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13108 states, 13107 states have (on average 3.8236057068741895) internal successors, (50116), 13107 states have internal predecessors, (50116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:16,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13108 states to 13108 states and 50116 transitions. [2021-06-12 22:03:16,571 INFO L78 Accepts]: Start accepts. Automaton has 13108 states and 50116 transitions. Word has length 28 [2021-06-12 22:03:16,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:16,572 INFO L482 AbstractCegarLoop]: Abstraction has 13108 states and 50116 transitions. [2021-06-12 22:03:16,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 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) [2021-06-12 22:03:16,572 INFO L276 IsEmpty]: Start isEmpty. Operand 13108 states and 50116 transitions. [2021-06-12 22:03:16,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:16,590 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:16,590 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:16,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4021 [2021-06-12 22:03:16,791 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:16,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:16,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1387096988, now seen corresponding path program 108 times [2021-06-12 22:03:16,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:16,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709285965] [2021-06-12 22:03:16,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:16,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:16,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:03:16,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:16,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709285965] [2021-06-12 22:03:16,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709285965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:16,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827348494] [2021-06-12 22:03:16,818 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:16,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:03:16,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:16,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:03:16,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:16,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:16,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827348494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:16,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:16,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 22:03:16,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448668351] [2021-06-12 22:03:16,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:03:16,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:16,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:03:16,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:03:16,929 INFO L87 Difference]: Start difference. First operand 13108 states and 50116 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:17,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:17,654 INFO L93 Difference]: Finished difference Result 20270 states and 73737 transitions. [2021-06-12 22:03:17,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 22:03:17,654 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:17,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:17,692 INFO L225 Difference]: With dead ends: 20270 [2021-06-12 22:03:17,692 INFO L226 Difference]: Without dead ends: 20257 [2021-06-12 22:03:17,692 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 373.1ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 22:03:17,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20257 states. [2021-06-12 22:03:17,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20257 to 14410. [2021-06-12 22:03:17,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14410 states, 14409 states have (on average 3.8785481296411963) internal successors, (55886), 14409 states have internal predecessors, (55886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:18,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14410 states to 14410 states and 55886 transitions. [2021-06-12 22:03:18,011 INFO L78 Accepts]: Start accepts. Automaton has 14410 states and 55886 transitions. Word has length 28 [2021-06-12 22:03:18,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:18,011 INFO L482 AbstractCegarLoop]: Abstraction has 14410 states and 55886 transitions. [2021-06-12 22:03:18,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:18,012 INFO L276 IsEmpty]: Start isEmpty. Operand 14410 states and 55886 transitions. [2021-06-12 22:03:18,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:18,033 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:18,033 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:18,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4022 [2021-06-12 22:03:18,233 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:18,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:18,234 INFO L82 PathProgramCache]: Analyzing trace with hash 2059509770, now seen corresponding path program 109 times [2021-06-12 22:03:18,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:18,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029370038] [2021-06-12 22:03:18,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:18,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:18,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:03:18,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:18,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029370038] [2021-06-12 22:03:18,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029370038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:18,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385238448] [2021-06-12 22:03:18,261 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:18,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:18,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:03:18,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:18,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:18,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385238448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:18,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:18,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 22:03:18,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781864230] [2021-06-12 22:03:18,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:03:18,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:18,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:03:18,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:03:18,371 INFO L87 Difference]: Start difference. First operand 14410 states and 55886 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:19,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:19,103 INFO L93 Difference]: Finished difference Result 20362 states and 73979 transitions. [2021-06-12 22:03:19,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 22:03:19,103 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:19,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:19,143 INFO L225 Difference]: With dead ends: 20362 [2021-06-12 22:03:19,143 INFO L226 Difference]: Without dead ends: 20356 [2021-06-12 22:03:19,144 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 411.1ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 22:03:19,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20356 states. [2021-06-12 22:03:19,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20356 to 14386. [2021-06-12 22:03:19,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14386 states, 14385 states have (on average 3.877650330205075) internal successors, (55780), 14385 states have internal predecessors, (55780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:19,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14386 states to 14386 states and 55780 transitions. [2021-06-12 22:03:19,480 INFO L78 Accepts]: Start accepts. Automaton has 14386 states and 55780 transitions. Word has length 28 [2021-06-12 22:03:19,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:19,480 INFO L482 AbstractCegarLoop]: Abstraction has 14386 states and 55780 transitions. [2021-06-12 22:03:19,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:19,480 INFO L276 IsEmpty]: Start isEmpty. Operand 14386 states and 55780 transitions. [2021-06-12 22:03:19,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:19,501 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:19,501 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:19,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4023 [2021-06-12 22:03:19,705 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:19,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:19,705 INFO L82 PathProgramCache]: Analyzing trace with hash 244170948, now seen corresponding path program 110 times [2021-06-12 22:03:19,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:19,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624814085] [2021-06-12 22:03:19,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:19,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:19,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:19,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:19,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624814085] [2021-06-12 22:03:19,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624814085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:19,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777969777] [2021-06-12 22:03:19,731 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:19,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:03:19,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:19,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:03:19,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:19,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:19,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777969777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:19,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:19,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 22:03:19,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939322702] [2021-06-12 22:03:19,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:03:19,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:19,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:03:19,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:03:19,831 INFO L87 Difference]: Start difference. First operand 14386 states and 55780 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:20,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:20,526 INFO L93 Difference]: Finished difference Result 23158 states and 84169 transitions. [2021-06-12 22:03:20,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:03:20,526 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:20,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:20,575 INFO L225 Difference]: With dead ends: 23158 [2021-06-12 22:03:20,575 INFO L226 Difference]: Without dead ends: 23145 [2021-06-12 22:03:20,575 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 373.1ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:03:20,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23145 states. [2021-06-12 22:03:20,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23145 to 14458. [2021-06-12 22:03:20,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14458 states, 14457 states have (on average 3.882548246524175) internal successors, (56130), 14457 states have internal predecessors, (56130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:20,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14458 states to 14458 states and 56130 transitions. [2021-06-12 22:03:20,930 INFO L78 Accepts]: Start accepts. Automaton has 14458 states and 56130 transitions. Word has length 28 [2021-06-12 22:03:20,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:20,930 INFO L482 AbstractCegarLoop]: Abstraction has 14458 states and 56130 transitions. [2021-06-12 22:03:20,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:20,930 INFO L276 IsEmpty]: Start isEmpty. Operand 14458 states and 56130 transitions. [2021-06-12 22:03:20,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:20,953 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:20,953 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:21,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4024 [2021-06-12 22:03:21,154 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:21,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:21,154 INFO L82 PathProgramCache]: Analyzing trace with hash -438573382, now seen corresponding path program 111 times [2021-06-12 22:03:21,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:21,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547762198] [2021-06-12 22:03:21,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:21,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:21,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:21,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:21,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547762198] [2021-06-12 22:03:21,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547762198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:21,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653543483] [2021-06-12 22:03:21,181 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:21,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:03:21,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:21,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:03:21,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:21,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:21,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653543483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:21,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:21,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 22:03:21,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980501917] [2021-06-12 22:03:21,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:03:21,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:21,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:03:21,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:03:21,284 INFO L87 Difference]: Start difference. First operand 14458 states and 56130 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:21,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:21,988 INFO L93 Difference]: Finished difference Result 24792 states and 89366 transitions. [2021-06-12 22:03:21,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 22:03:21,988 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:21,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:22,039 INFO L225 Difference]: With dead ends: 24792 [2021-06-12 22:03:22,039 INFO L226 Difference]: Without dead ends: 24792 [2021-06-12 22:03:22,040 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 388.1ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 22:03:22,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24792 states. [2021-06-12 22:03:22,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24792 to 14502. [2021-06-12 22:03:22,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14502 states, 14501 states have (on average 3.8793876284394178) internal successors, (56255), 14501 states have internal predecessors, (56255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:22,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14502 states to 14502 states and 56255 transitions. [2021-06-12 22:03:22,418 INFO L78 Accepts]: Start accepts. Automaton has 14502 states and 56255 transitions. Word has length 28 [2021-06-12 22:03:22,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:22,418 INFO L482 AbstractCegarLoop]: Abstraction has 14502 states and 56255 transitions. [2021-06-12 22:03:22,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:22,418 INFO L276 IsEmpty]: Start isEmpty. Operand 14502 states and 56255 transitions. [2021-06-12 22:03:22,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:22,440 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:22,440 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:22,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4025,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:22,640 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:22,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:22,641 INFO L82 PathProgramCache]: Analyzing trace with hash -362417666, now seen corresponding path program 77 times [2021-06-12 22:03:22,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:22,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557786063] [2021-06-12 22:03:22,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:22,773 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:22,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:22,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557786063] [2021-06-12 22:03:22,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557786063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:22,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562596326] [2021-06-12 22:03:22,773 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:22,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 22:03:22,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:22,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:22,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:22,873 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:22,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562596326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:22,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:22,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-12 22:03:22,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619982720] [2021-06-12 22:03:22,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:03:22,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:22,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:03:22,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:03:22,874 INFO L87 Difference]: Start difference. First operand 14502 states and 56255 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:23,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:23,817 INFO L93 Difference]: Finished difference Result 24486 states and 90901 transitions. [2021-06-12 22:03:23,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 22:03:23,818 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:23,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:23,867 INFO L225 Difference]: With dead ends: 24486 [2021-06-12 22:03:23,868 INFO L226 Difference]: Without dead ends: 24482 [2021-06-12 22:03:23,868 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 621.0ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 22:03:23,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24482 states. [2021-06-12 22:03:24,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24482 to 14756. [2021-06-12 22:03:24,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14756 states, 14755 states have (on average 3.869739071501186) internal successors, (57098), 14755 states have internal predecessors, (57098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:24,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14756 states to 14756 states and 57098 transitions. [2021-06-12 22:03:24,257 INFO L78 Accepts]: Start accepts. Automaton has 14756 states and 57098 transitions. Word has length 28 [2021-06-12 22:03:24,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:24,257 INFO L482 AbstractCegarLoop]: Abstraction has 14756 states and 57098 transitions. [2021-06-12 22:03:24,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:24,257 INFO L276 IsEmpty]: Start isEmpty. Operand 14756 states and 57098 transitions. [2021-06-12 22:03:24,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:24,280 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:24,280 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:24,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4026,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:24,481 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:24,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:24,481 INFO L82 PathProgramCache]: Analyzing trace with hash 502966272, now seen corresponding path program 112 times [2021-06-12 22:03:24,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:24,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329338702] [2021-06-12 22:03:24,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:24,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:24,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:24,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:24,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329338702] [2021-06-12 22:03:24,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329338702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:24,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663548816] [2021-06-12 22:03:24,513 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:24,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:03:24,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:24,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:03:24,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:24,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:24,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663548816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:24,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:24,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:03:24,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941518525] [2021-06-12 22:03:24,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:03:24,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:24,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:03:24,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:03:24,606 INFO L87 Difference]: Start difference. First operand 14756 states and 57098 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-12 22:03:25,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:25,268 INFO L93 Difference]: Finished difference Result 21631 states and 80082 transitions. [2021-06-12 22:03:25,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:03:25,268 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 [2021-06-12 22:03:25,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:25,309 INFO L225 Difference]: With dead ends: 21631 [2021-06-12 22:03:25,309 INFO L226 Difference]: Without dead ends: 21608 [2021-06-12 22:03:25,310 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 335.3ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 22:03:25,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21608 states. [2021-06-12 22:03:25,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21608 to 15111. [2021-06-12 22:03:25,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15111 states, 15110 states have (on average 3.888682991396426) internal successors, (58758), 15110 states have internal predecessors, (58758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:25,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15111 states to 15111 states and 58758 transitions. [2021-06-12 22:03:25,702 INFO L78 Accepts]: Start accepts. Automaton has 15111 states and 58758 transitions. Word has length 28 [2021-06-12 22:03:25,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:25,702 INFO L482 AbstractCegarLoop]: Abstraction has 15111 states and 58758 transitions. [2021-06-12 22:03:25,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-12 22:03:25,702 INFO L276 IsEmpty]: Start isEmpty. Operand 15111 states and 58758 transitions. [2021-06-12 22:03:25,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:25,724 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:25,724 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:25,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4027 [2021-06-12 22:03:25,929 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:25,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:25,929 INFO L82 PathProgramCache]: Analyzing trace with hash -179778058, now seen corresponding path program 113 times [2021-06-12 22:03:25,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:25,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88684259] [2021-06-12 22:03:25,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:25,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:25,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:25,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:25,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88684259] [2021-06-12 22:03:25,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88684259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:25,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593963767] [2021-06-12 22:03:25,960 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:25,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:03:25,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:25,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:03:25,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:26,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:26,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593963767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:26,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:26,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:03:26,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519403005] [2021-06-12 22:03:26,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:03:26,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:26,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:03:26,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:03:26,061 INFO L87 Difference]: Start difference. First operand 15111 states and 58758 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-12 22:03:26,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:26,788 INFO L93 Difference]: Finished difference Result 21728 states and 79303 transitions. [2021-06-12 22:03:26,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:03:26,789 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 [2021-06-12 22:03:26,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:26,831 INFO L225 Difference]: With dead ends: 21728 [2021-06-12 22:03:26,831 INFO L226 Difference]: Without dead ends: 21728 [2021-06-12 22:03:26,832 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 411.4ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:03:26,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21728 states. [2021-06-12 22:03:27,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21728 to 15230. [2021-06-12 22:03:27,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15230 states, 15229 states have (on average 3.880753824939261) internal successors, (59100), 15229 states have internal predecessors, (59100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:27,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15230 states to 15230 states and 59100 transitions. [2021-06-12 22:03:27,160 INFO L78 Accepts]: Start accepts. Automaton has 15230 states and 59100 transitions. Word has length 28 [2021-06-12 22:03:27,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:27,160 INFO L482 AbstractCegarLoop]: Abstraction has 15230 states and 59100 transitions. [2021-06-12 22:03:27,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-12 22:03:27,160 INFO L276 IsEmpty]: Start isEmpty. Operand 15230 states and 59100 transitions. [2021-06-12 22:03:27,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:27,181 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:27,181 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:27,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4028,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:27,382 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:27,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:27,382 INFO L82 PathProgramCache]: Analyzing trace with hash -499896522, now seen corresponding path program 114 times [2021-06-12 22:03:27,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:27,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828959506] [2021-06-12 22:03:27,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:27,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:27,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:27,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:27,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828959506] [2021-06-12 22:03:27,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828959506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:27,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641439698] [2021-06-12 22:03:27,415 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:27,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:03:27,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:27,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:03:27,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:27,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:27,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641439698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:27,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:27,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:03:27,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311032152] [2021-06-12 22:03:27,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:03:27,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:27,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:03:27,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:03:27,514 INFO L87 Difference]: Start difference. First operand 15230 states and 59100 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-12 22:03:28,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:28,186 INFO L93 Difference]: Finished difference Result 24246 states and 88914 transitions. [2021-06-12 22:03:28,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 22:03:28,186 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 [2021-06-12 22:03:28,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:28,234 INFO L225 Difference]: With dead ends: 24246 [2021-06-12 22:03:28,234 INFO L226 Difference]: Without dead ends: 24246 [2021-06-12 22:03:28,235 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 361.7ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:03:28,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24246 states. [2021-06-12 22:03:28,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24246 to 16389. [2021-06-12 22:03:28,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16389 states, 16388 states have (on average 3.862521357090554) internal successors, (63299), 16388 states have internal predecessors, (63299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:28,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16389 states to 16389 states and 63299 transitions. [2021-06-12 22:03:28,657 INFO L78 Accepts]: Start accepts. Automaton has 16389 states and 63299 transitions. Word has length 28 [2021-06-12 22:03:28,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:28,657 INFO L482 AbstractCegarLoop]: Abstraction has 16389 states and 63299 transitions. [2021-06-12 22:03:28,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-12 22:03:28,657 INFO L276 IsEmpty]: Start isEmpty. Operand 16389 states and 63299 transitions. [2021-06-12 22:03:28,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:28,680 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:28,680 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:28,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4029,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:28,880 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:28,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:28,881 INFO L82 PathProgramCache]: Analyzing trace with hash 389506442, now seen corresponding path program 115 times [2021-06-12 22:03:28,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:28,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544717384] [2021-06-12 22:03:28,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:28,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:28,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:28,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544717384] [2021-06-12 22:03:28,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544717384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:28,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128530371] [2021-06-12 22:03:28,912 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:28,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:28,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:03:28,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:29,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:29,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128530371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:29,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:29,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 22:03:29,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427811187] [2021-06-12 22:03:29,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:03:29,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:29,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:03:29,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:03:29,019 INFO L87 Difference]: Start difference. First operand 16389 states and 63299 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:29,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:29,901 INFO L93 Difference]: Finished difference Result 27385 states and 99086 transitions. [2021-06-12 22:03:29,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:03:29,901 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:29,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:29,959 INFO L225 Difference]: With dead ends: 27385 [2021-06-12 22:03:29,959 INFO L226 Difference]: Without dead ends: 27385 [2021-06-12 22:03:29,960 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 468.1ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 22:03:29,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27385 states. [2021-06-12 22:03:30,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27385 to 16619. [2021-06-12 22:03:30,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16619 states, 16618 states have (on average 3.8775424238777227) internal successors, (64437), 16618 states have internal predecessors, (64437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:30,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16619 states to 16619 states and 64437 transitions. [2021-06-12 22:03:30,334 INFO L78 Accepts]: Start accepts. Automaton has 16619 states and 64437 transitions. Word has length 28 [2021-06-12 22:03:30,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:30,334 INFO L482 AbstractCegarLoop]: Abstraction has 16619 states and 64437 transitions. [2021-06-12 22:03:30,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:30,334 INFO L276 IsEmpty]: Start isEmpty. Operand 16619 states and 64437 transitions. [2021-06-12 22:03:30,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:30,358 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:30,358 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:30,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4030 [2021-06-12 22:03:30,558 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:30,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:30,558 INFO L82 PathProgramCache]: Analyzing trace with hash -933026596, now seen corresponding path program 78 times [2021-06-12 22:03:30,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:30,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520436222] [2021-06-12 22:03:30,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:30,608 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:30,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:30,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520436222] [2021-06-12 22:03:30,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520436222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:30,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295525954] [2021-06-12 22:03:30,609 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:30,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:03:30,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:30,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:30,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:30,762 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:30,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295525954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:30,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:30,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:03:30,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275159469] [2021-06-12 22:03:30,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:03:30,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:30,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:03:30,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:03:30,762 INFO L87 Difference]: Start difference. First operand 16619 states and 64437 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:32,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:32,302 INFO L93 Difference]: Finished difference Result 42879 states and 155463 transitions. [2021-06-12 22:03:32,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-12 22:03:32,302 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:32,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:32,397 INFO L225 Difference]: With dead ends: 42879 [2021-06-12 22:03:32,397 INFO L226 Difference]: Without dead ends: 42879 [2021-06-12 22:03:32,398 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 888.3ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 22:03:32,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42879 states. [2021-06-12 22:03:32,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42879 to 17863. [2021-06-12 22:03:32,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17863 states, 17862 states have (on average 3.9155189788377562) internal successors, (69939), 17862 states have internal predecessors, (69939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:33,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17863 states to 17863 states and 69939 transitions. [2021-06-12 22:03:33,010 INFO L78 Accepts]: Start accepts. Automaton has 17863 states and 69939 transitions. Word has length 28 [2021-06-12 22:03:33,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:33,010 INFO L482 AbstractCegarLoop]: Abstraction has 17863 states and 69939 transitions. [2021-06-12 22:03:33,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:33,010 INFO L276 IsEmpty]: Start isEmpty. Operand 17863 states and 69939 transitions. [2021-06-12 22:03:33,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:33,035 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:33,035 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:33,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4031,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:33,236 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:33,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:33,236 INFO L82 PathProgramCache]: Analyzing trace with hash -366074516, now seen corresponding path program 79 times [2021-06-12 22:03:33,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:33,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118743384] [2021-06-12 22:03:33,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:33,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:33,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:33,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118743384] [2021-06-12 22:03:33,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118743384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:33,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647059665] [2021-06-12 22:03:33,271 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:33,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:33,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:33,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:33,397 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:33,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647059665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:33,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:33,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:03:33,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032245751] [2021-06-12 22:03:33,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:03:33,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:33,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:03:33,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:03:33,398 INFO L87 Difference]: Start difference. First operand 17863 states and 69939 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:34,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:34,961 INFO L93 Difference]: Finished difference Result 41907 states and 152905 transitions. [2021-06-12 22:03:34,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-12 22:03:34,961 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:34,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:35,054 INFO L225 Difference]: With dead ends: 41907 [2021-06-12 22:03:35,054 INFO L226 Difference]: Without dead ends: 41907 [2021-06-12 22:03:35,054 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 909.1ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 22:03:35,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41907 states. [2021-06-12 22:03:35,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41907 to 17837. [2021-06-12 22:03:35,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17837 states, 17836 states have (on average 3.912480376766091) internal successors, (69783), 17836 states have internal predecessors, (69783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:35,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17837 states to 17837 states and 69783 transitions. [2021-06-12 22:03:35,662 INFO L78 Accepts]: Start accepts. Automaton has 17837 states and 69783 transitions. Word has length 28 [2021-06-12 22:03:35,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:35,662 INFO L482 AbstractCegarLoop]: Abstraction has 17837 states and 69783 transitions. [2021-06-12 22:03:35,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:35,662 INFO L276 IsEmpty]: Start isEmpty. Operand 17837 states and 69783 transitions. [2021-06-12 22:03:35,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:35,687 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:35,687 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:35,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4032 [2021-06-12 22:03:35,888 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:35,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:35,888 INFO L82 PathProgramCache]: Analyzing trace with hash -648300864, now seen corresponding path program 116 times [2021-06-12 22:03:35,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:35,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854256739] [2021-06-12 22:03:35,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:35,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:35,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:35,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854256739] [2021-06-12 22:03:35,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854256739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:35,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811656543] [2021-06-12 22:03:35,929 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:35,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:03:35,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:35,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:03:35,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:36,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:36,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811656543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:36,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:36,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:03:36,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112763789] [2021-06-12 22:03:36,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:03:36,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:36,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:03:36,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:03:36,007 INFO L87 Difference]: Start difference. First operand 17837 states and 69783 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:36,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:36,290 INFO L93 Difference]: Finished difference Result 28682 states and 110964 transitions. [2021-06-12 22:03:36,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:03:36,290 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 [2021-06-12 22:03:36,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:36,361 INFO L225 Difference]: With dead ends: 28682 [2021-06-12 22:03:36,361 INFO L226 Difference]: Without dead ends: 28632 [2021-06-12 22:03:36,361 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:03:36,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28632 states. [2021-06-12 22:03:36,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28632 to 23563. [2021-06-12 22:03:36,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23563 states, 23562 states have (on average 3.9230965113318055) internal successors, (92436), 23562 states have internal predecessors, (92436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:36,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23563 states to 23563 states and 92436 transitions. [2021-06-12 22:03:36,942 INFO L78 Accepts]: Start accepts. Automaton has 23563 states and 92436 transitions. Word has length 28 [2021-06-12 22:03:36,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:36,942 INFO L482 AbstractCegarLoop]: Abstraction has 23563 states and 92436 transitions. [2021-06-12 22:03:36,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:36,942 INFO L276 IsEmpty]: Start isEmpty. Operand 23563 states and 92436 transitions. [2021-06-12 22:03:36,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:36,979 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:36,979 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:37,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4033 [2021-06-12 22:03:37,180 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:37,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:37,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1261765878, now seen corresponding path program 117 times [2021-06-12 22:03:37,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:37,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215637773] [2021-06-12 22:03:37,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:37,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:37,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:37,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:37,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215637773] [2021-06-12 22:03:37,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215637773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:37,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026408648] [2021-06-12 22:03:37,209 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:37,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:03:37,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:37,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:03:37,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:37,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:37,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026408648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:37,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:37,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:03:37,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503653840] [2021-06-12 22:03:37,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:03:37,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:37,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:03:37,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:03:37,291 INFO L87 Difference]: Start difference. First operand 23563 states and 92436 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:37,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:37,556 INFO L93 Difference]: Finished difference Result 26308 states and 100773 transitions. [2021-06-12 22:03:37,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:03:37,556 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 [2021-06-12 22:03:37,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:37,621 INFO L225 Difference]: With dead ends: 26308 [2021-06-12 22:03:37,621 INFO L226 Difference]: Without dead ends: 26308 [2021-06-12 22:03:37,621 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 95.8ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:03:37,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26308 states. [2021-06-12 22:03:38,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26308 to 23066. [2021-06-12 22:03:38,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23066 states, 23065 states have (on average 3.9134619553435943) internal successors, (90264), 23065 states have internal predecessors, (90264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:38,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23066 states to 23066 states and 90264 transitions. [2021-06-12 22:03:38,105 INFO L78 Accepts]: Start accepts. Automaton has 23066 states and 90264 transitions. Word has length 28 [2021-06-12 22:03:38,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:38,105 INFO L482 AbstractCegarLoop]: Abstraction has 23066 states and 90264 transitions. [2021-06-12 22:03:38,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:38,105 INFO L276 IsEmpty]: Start isEmpty. Operand 23066 states and 90264 transitions. [2021-06-12 22:03:38,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:38,140 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:38,140 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:38,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4034 [2021-06-12 22:03:38,341 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:38,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:38,341 INFO L82 PathProgramCache]: Analyzing trace with hash 310084440, now seen corresponding path program 118 times [2021-06-12 22:03:38,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:38,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610982004] [2021-06-12 22:03:38,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:38,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:38,377 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:38,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:38,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610982004] [2021-06-12 22:03:38,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610982004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:38,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655338008] [2021-06-12 22:03:38,378 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:38,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:03:38,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:38,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:38,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:38,498 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:03:38,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655338008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:38,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:38,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-12 22:03:38,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309382311] [2021-06-12 22:03:38,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:03:38,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:38,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:03:38,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:03:38,499 INFO L87 Difference]: Start difference. First operand 23066 states and 90264 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:39,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:39,468 INFO L93 Difference]: Finished difference Result 35513 states and 132496 transitions. [2021-06-12 22:03:39,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:03:39,468 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:39,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:39,547 INFO L225 Difference]: With dead ends: 35513 [2021-06-12 22:03:39,547 INFO L226 Difference]: Without dead ends: 35513 [2021-06-12 22:03:39,547 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 498.8ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:03:39,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35513 states. [2021-06-12 22:03:40,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35513 to 23134. [2021-06-12 22:03:40,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23134 states, 23133 states have (on average 3.9115981498292482) internal successors, (90487), 23133 states have internal predecessors, (90487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:40,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23134 states to 23134 states and 90487 transitions. [2021-06-12 22:03:40,110 INFO L78 Accepts]: Start accepts. Automaton has 23134 states and 90487 transitions. Word has length 28 [2021-06-12 22:03:40,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:40,110 INFO L482 AbstractCegarLoop]: Abstraction has 23134 states and 90487 transitions. [2021-06-12 22:03:40,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:40,110 INFO L276 IsEmpty]: Start isEmpty. Operand 23134 states and 90487 transitions. [2021-06-12 22:03:40,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:40,143 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:40,143 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:40,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4035 [2021-06-12 22:03:40,344 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:40,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:40,344 INFO L82 PathProgramCache]: Analyzing trace with hash -666234404, now seen corresponding path program 119 times [2021-06-12 22:03:40,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:40,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124011439] [2021-06-12 22:03:40,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:40,381 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:40,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:40,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124011439] [2021-06-12 22:03:40,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124011439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:40,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939669690] [2021-06-12 22:03:40,381 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:40,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:03:40,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:40,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:40,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:40,497 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:03:40,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939669690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:40,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:40,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 22:03:40,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112692626] [2021-06-12 22:03:40,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:03:40,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:40,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:03:40,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:03:40,498 INFO L87 Difference]: Start difference. First operand 23134 states and 90487 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:42,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:42,110 INFO L93 Difference]: Finished difference Result 45671 states and 168413 transitions. [2021-06-12 22:03:42,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-12 22:03:42,110 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:42,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:42,207 INFO L225 Difference]: With dead ends: 45671 [2021-06-12 22:03:42,207 INFO L226 Difference]: Without dead ends: 45671 [2021-06-12 22:03:42,208 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 864.5ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 22:03:42,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45671 states. [2021-06-12 22:03:42,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45671 to 23135. [2021-06-12 22:03:42,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23135 states, 23134 states have (on average 3.913460707184231) internal successors, (90534), 23134 states have internal predecessors, (90534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:42,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23135 states to 23135 states and 90534 transitions. [2021-06-12 22:03:42,865 INFO L78 Accepts]: Start accepts. Automaton has 23135 states and 90534 transitions. Word has length 28 [2021-06-12 22:03:42,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:42,865 INFO L482 AbstractCegarLoop]: Abstraction has 23135 states and 90534 transitions. [2021-06-12 22:03:42,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:42,865 INFO L276 IsEmpty]: Start isEmpty. Operand 23135 states and 90534 transitions. [2021-06-12 22:03:42,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:42,898 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:42,898 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:43,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4036,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:43,099 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:43,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:43,099 INFO L82 PathProgramCache]: Analyzing trace with hash -99282324, now seen corresponding path program 120 times [2021-06-12 22:03:43,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:43,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868774992] [2021-06-12 22:03:43,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:43,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:43,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:43,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:43,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868774992] [2021-06-12 22:03:43,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868774992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:43,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816281059] [2021-06-12 22:03:43,144 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:43,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:03:43,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:43,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:43,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:43,269 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:03:43,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816281059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:43,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:43,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 22:03:43,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386946384] [2021-06-12 22:03:43,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:03:43,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:43,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:03:43,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:03:43,270 INFO L87 Difference]: Start difference. First operand 23135 states and 90534 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:44,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:44,751 INFO L93 Difference]: Finished difference Result 45296 states and 167759 transitions. [2021-06-12 22:03:44,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-12 22:03:44,751 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:03:44,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:44,852 INFO L225 Difference]: With dead ends: 45296 [2021-06-12 22:03:44,852 INFO L226 Difference]: Without dead ends: 45296 [2021-06-12 22:03:44,853 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 858.5ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-06-12 22:03:44,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45296 states. [2021-06-12 22:03:45,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45296 to 22919. [2021-06-12 22:03:45,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22919 states, 22918 states have (on average 3.9066236146260582) internal successors, (89532), 22918 states have internal predecessors, (89532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:45,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22919 states to 22919 states and 89532 transitions. [2021-06-12 22:03:45,547 INFO L78 Accepts]: Start accepts. Automaton has 22919 states and 89532 transitions. Word has length 28 [2021-06-12 22:03:45,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:45,547 INFO L482 AbstractCegarLoop]: Abstraction has 22919 states and 89532 transitions. [2021-06-12 22:03:45,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:45,547 INFO L276 IsEmpty]: Start isEmpty. Operand 22919 states and 89532 transitions. [2021-06-12 22:03:45,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:45,583 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:45,583 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:45,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4037,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:45,784 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:45,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:45,784 INFO L82 PathProgramCache]: Analyzing trace with hash 836856348, now seen corresponding path program 121 times [2021-06-12 22:03:45,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:45,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33421279] [2021-06-12 22:03:45,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:45,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:45,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:03:45,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:45,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33421279] [2021-06-12 22:03:45,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33421279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:45,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441912792] [2021-06-12 22:03:45,812 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:45,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:45,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:03:45,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:03:45,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441912792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:45,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:45,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-12 22:03:45,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44046284] [2021-06-12 22:03:45,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:03:45,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:45,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:03:45,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:03:45,892 INFO L87 Difference]: Start difference. First operand 22919 states and 89532 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-06-12 22:03:46,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:46,180 INFO L93 Difference]: Finished difference Result 35247 states and 132459 transitions. [2021-06-12 22:03:46,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:03:46,180 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 [2021-06-12 22:03:46,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:46,259 INFO L225 Difference]: With dead ends: 35247 [2021-06-12 22:03:46,260 INFO L226 Difference]: Without dead ends: 35230 [2021-06-12 22:03:46,260 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:03:46,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35230 states. [2021-06-12 22:03:46,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35230 to 23187. [2021-06-12 22:03:46,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23187 states, 23186 states have (on average 3.9111532821530233) internal successors, (90684), 23186 states have internal predecessors, (90684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:46,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23187 states to 23187 states and 90684 transitions. [2021-06-12 22:03:46,902 INFO L78 Accepts]: Start accepts. Automaton has 23187 states and 90684 transitions. Word has length 28 [2021-06-12 22:03:46,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:46,902 INFO L482 AbstractCegarLoop]: Abstraction has 23187 states and 90684 transitions. [2021-06-12 22:03:46,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-06-12 22:03:46,902 INFO L276 IsEmpty]: Start isEmpty. Operand 23187 states and 90684 transitions. [2021-06-12 22:03:46,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:46,934 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:46,934 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:47,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4038,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:47,134 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:47,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:47,135 INFO L82 PathProgramCache]: Analyzing trace with hash -306069692, now seen corresponding path program 122 times [2021-06-12 22:03:47,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:47,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685131019] [2021-06-12 22:03:47,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:47,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:03:47,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:47,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685131019] [2021-06-12 22:03:47,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685131019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:47,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411518003] [2021-06-12 22:03:47,163 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:47,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:03:47,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:47,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:03:47,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:47,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:03:47,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411518003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:47,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:47,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-12 22:03:47,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013483069] [2021-06-12 22:03:47,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:03:47,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:47,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:03:47,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:03:47,248 INFO L87 Difference]: Start difference. First operand 23187 states and 90684 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-06-12 22:03:47,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:47,539 INFO L93 Difference]: Finished difference Result 37405 states and 139306 transitions. [2021-06-12 22:03:47,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:03:47,539 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 [2021-06-12 22:03:47,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:47,617 INFO L225 Difference]: With dead ends: 37405 [2021-06-12 22:03:47,617 INFO L226 Difference]: Without dead ends: 37405 [2021-06-12 22:03:47,618 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:03:47,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37405 states. [2021-06-12 22:03:48,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37405 to 22856. [2021-06-12 22:03:48,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22856 states, 22855 states have (on average 3.898402975278932) internal successors, (89098), 22855 states have internal predecessors, (89098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:48,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22856 states to 22856 states and 89098 transitions. [2021-06-12 22:03:48,166 INFO L78 Accepts]: Start accepts. Automaton has 22856 states and 89098 transitions. Word has length 28 [2021-06-12 22:03:48,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:48,166 INFO L482 AbstractCegarLoop]: Abstraction has 22856 states and 89098 transitions. [2021-06-12 22:03:48,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-06-12 22:03:48,167 INFO L276 IsEmpty]: Start isEmpty. Operand 22856 states and 89098 transitions. [2021-06-12 22:03:48,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:48,198 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:48,199 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:48,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4039,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:48,399 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:48,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:48,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1652751258, now seen corresponding path program 123 times [2021-06-12 22:03:48,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:48,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740245406] [2021-06-12 22:03:48,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:48,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:48,451 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:48,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:48,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740245406] [2021-06-12 22:03:48,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740245406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:48,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561869774] [2021-06-12 22:03:48,451 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:48,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:03:48,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:48,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:48,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:48,711 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:03:48,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561869774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:48,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:48,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:03:48,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995153239] [2021-06-12 22:03:48,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:03:48,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:48,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:03:48,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:03:48,712 INFO L87 Difference]: Start difference. First operand 22856 states and 89098 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-06-12 22:03:49,197 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-06-12 22:03:49,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:49,626 INFO L93 Difference]: Finished difference Result 32629 states and 122440 transitions. [2021-06-12 22:03:49,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 22:03:49,631 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 [2021-06-12 22:03:49,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:49,705 INFO L225 Difference]: With dead ends: 32629 [2021-06-12 22:03:49,705 INFO L226 Difference]: Without dead ends: 32629 [2021-06-12 22:03:49,706 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 538.7ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:03:49,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32629 states. [2021-06-12 22:03:50,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32629 to 22904. [2021-06-12 22:03:50,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22904 states, 22903 states have (on average 3.8973060297777584) internal successors, (89260), 22903 states have internal predecessors, (89260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:50,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22904 states to 22904 states and 89260 transitions. [2021-06-12 22:03:50,494 INFO L78 Accepts]: Start accepts. Automaton has 22904 states and 89260 transitions. Word has length 28 [2021-06-12 22:03:50,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:50,494 INFO L482 AbstractCegarLoop]: Abstraction has 22904 states and 89260 transitions. [2021-06-12 22:03:50,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-06-12 22:03:50,494 INFO L276 IsEmpty]: Start isEmpty. Operand 22904 states and 89260 transitions. [2021-06-12 22:03:50,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:50,529 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:50,529 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:50,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4040,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:50,729 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:50,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:50,729 INFO L82 PathProgramCache]: Analyzing trace with hash -867837164, now seen corresponding path program 124 times [2021-06-12 22:03:50,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:50,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578715481] [2021-06-12 22:03:50,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:50,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:50,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:50,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:50,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578715481] [2021-06-12 22:03:50,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578715481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:50,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819570124] [2021-06-12 22:03:50,766 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:50,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:03:50,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:50,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:50,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:50,863 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:03:50,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819570124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:50,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:50,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:03:50,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815178487] [2021-06-12 22:03:50,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:03:50,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:50,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:03:50,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:03:50,864 INFO L87 Difference]: Start difference. First operand 22904 states and 89260 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-06-12 22:03:52,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:52,019 INFO L93 Difference]: Finished difference Result 34174 states and 126879 transitions. [2021-06-12 22:03:52,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 22:03:52,026 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 [2021-06-12 22:03:52,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:52,109 INFO L225 Difference]: With dead ends: 34174 [2021-06-12 22:03:52,109 INFO L226 Difference]: Without dead ends: 34174 [2021-06-12 22:03:52,110 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 544.2ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 22:03:52,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34174 states. [2021-06-12 22:03:52,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34174 to 23462. [2021-06-12 22:03:52,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23462 states, 23461 states have (on average 3.8782234346362046) internal successors, (90987), 23461 states have internal predecessors, (90987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:52,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23462 states to 23462 states and 90987 transitions. [2021-06-12 22:03:52,727 INFO L78 Accepts]: Start accepts. Automaton has 23462 states and 90987 transitions. Word has length 28 [2021-06-12 22:03:52,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:52,727 INFO L482 AbstractCegarLoop]: Abstraction has 23462 states and 90987 transitions. [2021-06-12 22:03:52,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-06-12 22:03:52,727 INFO L276 IsEmpty]: Start isEmpty. Operand 23462 states and 90987 transitions. [2021-06-12 22:03:52,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:52,762 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:52,762 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:52,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4041 [2021-06-12 22:03:52,962 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:52,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:52,963 INFO L82 PathProgramCache]: Analyzing trace with hash -912658306, now seen corresponding path program 125 times [2021-06-12 22:03:52,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:52,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317310739] [2021-06-12 22:03:52,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:53,013 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:53,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:53,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317310739] [2021-06-12 22:03:53,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317310739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:53,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240019627] [2021-06-12 22:03:53,014 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:53,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:03:53,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:53,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:53,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:53,132 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:03:53,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240019627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:53,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:53,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:03:53,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110297662] [2021-06-12 22:03:53,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:03:53,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:53,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:03:53,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:03:53,133 INFO L87 Difference]: Start difference. First operand 23462 states and 90987 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-06-12 22:03:54,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:54,283 INFO L93 Difference]: Finished difference Result 33276 states and 124519 transitions. [2021-06-12 22:03:54,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 22:03:54,284 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 [2021-06-12 22:03:54,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:54,364 INFO L225 Difference]: With dead ends: 33276 [2021-06-12 22:03:54,364 INFO L226 Difference]: Without dead ends: 33272 [2021-06-12 22:03:54,365 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 479.7ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:03:54,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33272 states. [2021-06-12 22:03:54,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33272 to 23354. [2021-06-12 22:03:54,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23354 states, 23353 states have (on average 3.880657731340727) internal successors, (90625), 23353 states have internal predecessors, (90625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:55,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23354 states to 23354 states and 90625 transitions. [2021-06-12 22:03:55,011 INFO L78 Accepts]: Start accepts. Automaton has 23354 states and 90625 transitions. Word has length 28 [2021-06-12 22:03:55,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:55,011 INFO L482 AbstractCegarLoop]: Abstraction has 23354 states and 90625 transitions. [2021-06-12 22:03:55,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-06-12 22:03:55,011 INFO L276 IsEmpty]: Start isEmpty. Operand 23354 states and 90625 transitions. [2021-06-12 22:03:55,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:55,042 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:55,042 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:55,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4042,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:55,243 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:55,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:55,243 INFO L82 PathProgramCache]: Analyzing trace with hash -47274368, now seen corresponding path program 126 times [2021-06-12 22:03:55,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:55,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259915359] [2021-06-12 22:03:55,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:55,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:03:55,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:55,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259915359] [2021-06-12 22:03:55,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259915359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:55,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846064030] [2021-06-12 22:03:55,271 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:55,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:03:55,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:55,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:03:55,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:55,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 22:03:55,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846064030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:55,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:55,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-12 22:03:55,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265898540] [2021-06-12 22:03:55,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:03:55,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:55,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:03:55,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:03:55,349 INFO L87 Difference]: Start difference. First operand 23354 states and 90625 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-06-12 22:03:55,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:55,743 INFO L93 Difference]: Finished difference Result 29681 states and 111114 transitions. [2021-06-12 22:03:55,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:03:55,743 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 [2021-06-12 22:03:55,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:55,949 INFO L225 Difference]: With dead ends: 29681 [2021-06-12 22:03:55,949 INFO L226 Difference]: Without dead ends: 29681 [2021-06-12 22:03:55,949 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 97.6ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:03:55,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29681 states. [2021-06-12 22:03:56,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29681 to 23664. [2021-06-12 22:03:56,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23664 states, 23663 states have (on average 3.872628153657609) internal successors, (91638), 23663 states have internal predecessors, (91638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:56,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23664 states to 23664 states and 91638 transitions. [2021-06-12 22:03:56,495 INFO L78 Accepts]: Start accepts. Automaton has 23664 states and 91638 transitions. Word has length 28 [2021-06-12 22:03:56,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:56,495 INFO L482 AbstractCegarLoop]: Abstraction has 23664 states and 91638 transitions. [2021-06-12 22:03:56,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-06-12 22:03:56,496 INFO L276 IsEmpty]: Start isEmpty. Operand 23664 states and 91638 transitions. [2021-06-12 22:03:56,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:56,530 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:56,531 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:56,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4043 [2021-06-12 22:03:56,731 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:56,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:56,731 INFO L82 PathProgramCache]: Analyzing trace with hash 882925376, now seen corresponding path program 127 times [2021-06-12 22:03:56,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:56,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220031705] [2021-06-12 22:03:56,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:56,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:56,769 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:56,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:56,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220031705] [2021-06-12 22:03:56,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220031705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:56,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790365068] [2021-06-12 22:03:56,769 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:56,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:56,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:56,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:03:56,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790365068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:56,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:56,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 22:03:56,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558058288] [2021-06-12 22:03:56,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:03:56,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:56,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:03:56,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:03:56,863 INFO L87 Difference]: Start difference. First operand 23664 states and 91638 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:03:57,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:57,892 INFO L93 Difference]: Finished difference Result 34438 states and 127402 transitions. [2021-06-12 22:03:57,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:03:57,892 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 [2021-06-12 22:03:57,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:03:57,970 INFO L225 Difference]: With dead ends: 34438 [2021-06-12 22:03:57,971 INFO L226 Difference]: Without dead ends: 34438 [2021-06-12 22:03:57,971 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 449.1ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 22:03:58,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34438 states. [2021-06-12 22:03:58,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34438 to 25439. [2021-06-12 22:03:58,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25439 states, 25438 states have (on average 3.8818696438399245) internal successors, (98747), 25438 states have internal predecessors, (98747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:03:58,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25439 states to 25439 states and 98747 transitions. [2021-06-12 22:03:58,842 INFO L78 Accepts]: Start accepts. Automaton has 25439 states and 98747 transitions. Word has length 28 [2021-06-12 22:03:58,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:03:58,842 INFO L482 AbstractCegarLoop]: Abstraction has 25439 states and 98747 transitions. [2021-06-12 22:03:58,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:03:58,842 INFO L276 IsEmpty]: Start isEmpty. Operand 25439 states and 98747 transitions. [2021-06-12 22:03:58,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:03:58,878 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:03:58,878 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:03:59,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4044 [2021-06-12 22:03:59,079 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:03:59,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:03:59,079 INFO L82 PathProgramCache]: Analyzing trace with hash -956846952, now seen corresponding path program 128 times [2021-06-12 22:03:59,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:03:59,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702282383] [2021-06-12 22:03:59,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:03:59,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:03:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:03:59,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:03:59,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702282383] [2021-06-12 22:03:59,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702282383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:59,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269797519] [2021-06-12 22:03:59,115 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:03:59,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:03:59,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:03:59,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:03:59,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:03:59,196 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:03:59,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269797519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:03:59,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:03:59,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 22:03:59,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699704339] [2021-06-12 22:03:59,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:03:59,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:03:59,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:03:59,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:03:59,197 INFO L87 Difference]: Start difference. First operand 25439 states and 98747 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:03:59,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:03:59,983 INFO L93 Difference]: Finished difference Result 32691 states and 122893 transitions. [2021-06-12 22:03:59,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:03:59,983 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 [2021-06-12 22:03:59,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:00,056 INFO L225 Difference]: With dead ends: 32691 [2021-06-12 22:04:00,057 INFO L226 Difference]: Without dead ends: 32679 [2021-06-12 22:04:00,057 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 452.8ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:04:00,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32679 states. [2021-06-12 22:04:00,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32679 to 25599. [2021-06-12 22:04:00,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25599 states, 25598 states have (on average 3.8770607078678023) internal successors, (99245), 25598 states have internal predecessors, (99245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:00,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25599 states to 25599 states and 99245 transitions. [2021-06-12 22:04:00,904 INFO L78 Accepts]: Start accepts. Automaton has 25599 states and 99245 transitions. Word has length 28 [2021-06-12 22:04:00,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:00,904 INFO L482 AbstractCegarLoop]: Abstraction has 25599 states and 99245 transitions. [2021-06-12 22:04:00,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:04:00,905 INFO L276 IsEmpty]: Start isEmpty. Operand 25599 states and 99245 transitions. [2021-06-12 22:04:00,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:00,947 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:00,947 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:01,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4045 [2021-06-12 22:04:01,148 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:01,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:01,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1587630268, now seen corresponding path program 129 times [2021-06-12 22:04:01,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:01,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309390727] [2021-06-12 22:04:01,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:01,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:01,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:04:01,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:01,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309390727] [2021-06-12 22:04:01,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309390727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:01,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038078344] [2021-06-12 22:04:01,179 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:01,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:04:01,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:01,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:04:01,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:01,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:04:01,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038078344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:01,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:01,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 22:04:01,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568131600] [2021-06-12 22:04:01,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:04:01,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:01,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:04:01,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:04:01,262 INFO L87 Difference]: Start difference. First operand 25599 states and 99245 transitions. Second operand has 10 states, 10 states have (on average 3.7) 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) [2021-06-12 22:04:01,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:01,554 INFO L93 Difference]: Finished difference Result 30159 states and 114821 transitions. [2021-06-12 22:04:01,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 22:04:01,555 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) 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 [2021-06-12 22:04:01,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:01,769 INFO L225 Difference]: With dead ends: 30159 [2021-06-12 22:04:01,769 INFO L226 Difference]: Without dead ends: 30159 [2021-06-12 22:04:01,769 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:04:01,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30159 states. [2021-06-12 22:04:02,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30159 to 26806. [2021-06-12 22:04:02,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26806 states, 26805 states have (on average 3.8731952993844434) internal successors, (103821), 26805 states have internal predecessors, (103821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:02,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26806 states to 26806 states and 103821 transitions. [2021-06-12 22:04:02,360 INFO L78 Accepts]: Start accepts. Automaton has 26806 states and 103821 transitions. Word has length 28 [2021-06-12 22:04:02,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:02,360 INFO L482 AbstractCegarLoop]: Abstraction has 26806 states and 103821 transitions. [2021-06-12 22:04:02,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) 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) [2021-06-12 22:04:02,360 INFO L276 IsEmpty]: Start isEmpty. Operand 26806 states and 103821 transitions. [2021-06-12 22:04:02,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:02,402 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:02,402 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:02,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4046 [2021-06-12 22:04:02,603 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:02,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:02,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1143968700, now seen corresponding path program 130 times [2021-06-12 22:04:02,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:02,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477751348] [2021-06-12 22:04:02,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:02,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:02,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:02,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:02,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477751348] [2021-06-12 22:04:02,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477751348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:02,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898053186] [2021-06-12 22:04:02,641 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:02,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:04:02,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:02,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:02,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:02,729 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:02,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898053186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:02,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:02,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 22:04:02,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043026807] [2021-06-12 22:04:02,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:04:02,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:02,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:04:02,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:04:02,730 INFO L87 Difference]: Start difference. First operand 26806 states and 103821 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-12 22:04:03,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:03,609 INFO L93 Difference]: Finished difference Result 34754 states and 129602 transitions. [2021-06-12 22:04:03,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 22:04:03,609 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 [2021-06-12 22:04:03,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:03,686 INFO L225 Difference]: With dead ends: 34754 [2021-06-12 22:04:03,686 INFO L226 Difference]: Without dead ends: 34754 [2021-06-12 22:04:03,686 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 413.2ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 22:04:03,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34754 states. [2021-06-12 22:04:04,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34754 to 28000. [2021-06-12 22:04:04,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28000 states, 27999 states have (on average 3.8443515839851425) internal successors, (107638), 27999 states have internal predecessors, (107638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:04,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28000 states to 28000 states and 107638 transitions. [2021-06-12 22:04:04,641 INFO L78 Accepts]: Start accepts. Automaton has 28000 states and 107638 transitions. Word has length 28 [2021-06-12 22:04:04,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:04,642 INFO L482 AbstractCegarLoop]: Abstraction has 28000 states and 107638 transitions. [2021-06-12 22:04:04,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-12 22:04:04,642 INFO L276 IsEmpty]: Start isEmpty. Operand 28000 states and 107638 transitions. [2021-06-12 22:04:04,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:04,685 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:04,685 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:04,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4047,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:04,886 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:04,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:04,886 INFO L82 PathProgramCache]: Analyzing trace with hash -403875748, now seen corresponding path program 131 times [2021-06-12 22:04:04,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:04,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386122812] [2021-06-12 22:04:04,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:04,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:04,927 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:04,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:04,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386122812] [2021-06-12 22:04:04,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386122812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:04,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106474974] [2021-06-12 22:04:04,927 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:04,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:04:04,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:04,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:04,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:05,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106474974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:05,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:05,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:04:05,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503865346] [2021-06-12 22:04:05,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:04:05,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:05,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:04:05,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:04:05,007 INFO L87 Difference]: Start difference. First operand 28000 states and 107638 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-12 22:04:05,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:05,705 INFO L93 Difference]: Finished difference Result 33849 states and 127203 transitions. [2021-06-12 22:04:05,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:04:05,706 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 [2021-06-12 22:04:05,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:05,780 INFO L225 Difference]: With dead ends: 33849 [2021-06-12 22:04:05,781 INFO L226 Difference]: Without dead ends: 33841 [2021-06-12 22:04:05,781 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 285.7ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:04:05,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33841 states. [2021-06-12 22:04:06,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33841 to 27806. [2021-06-12 22:04:06,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27806 states, 27805 states have (on average 3.8502787268476895) internal successors, (107057), 27805 states have internal predecessors, (107057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:06,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27806 states to 27806 states and 107057 transitions. [2021-06-12 22:04:06,446 INFO L78 Accepts]: Start accepts. Automaton has 27806 states and 107057 transitions. Word has length 28 [2021-06-12 22:04:06,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:06,446 INFO L482 AbstractCegarLoop]: Abstraction has 27806 states and 107057 transitions. [2021-06-12 22:04:06,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-12 22:04:06,446 INFO L276 IsEmpty]: Start isEmpty. Operand 27806 states and 107057 transitions. [2021-06-12 22:04:06,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:06,488 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:06,488 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:06,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4048,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:06,689 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:06,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:06,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1046121180, now seen corresponding path program 132 times [2021-06-12 22:04:06,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:06,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782901941] [2021-06-12 22:04:06,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:06,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:06,720 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:06,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:06,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782901941] [2021-06-12 22:04:06,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782901941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:06,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081271716] [2021-06-12 22:04:06,721 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:06,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:04:06,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:06,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:06,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:06,806 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:06,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081271716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:06,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:06,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:04:06,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864470553] [2021-06-12 22:04:06,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:04:06,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:06,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:04:06,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:04:06,807 INFO L87 Difference]: Start difference. First operand 27806 states and 107057 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-12 22:04:07,066 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-06-12 22:04:07,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:07,801 INFO L93 Difference]: Finished difference Result 35673 states and 132779 transitions. [2021-06-12 22:04:07,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 22:04:07,801 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 [2021-06-12 22:04:07,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:07,891 INFO L225 Difference]: With dead ends: 35673 [2021-06-12 22:04:07,891 INFO L226 Difference]: Without dead ends: 35673 [2021-06-12 22:04:07,892 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 571.7ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 22:04:08,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35673 states. [2021-06-12 22:04:08,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35673 to 28844. [2021-06-12 22:04:08,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28844 states, 28843 states have (on average 3.827618486287834) internal successors, (110400), 28843 states have internal predecessors, (110400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:08,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28844 states to 28844 states and 110400 transitions. [2021-06-12 22:04:08,726 INFO L78 Accepts]: Start accepts. Automaton has 28844 states and 110400 transitions. Word has length 28 [2021-06-12 22:04:08,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:08,726 INFO L482 AbstractCegarLoop]: Abstraction has 28844 states and 110400 transitions. [2021-06-12 22:04:08,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-12 22:04:08,727 INFO L276 IsEmpty]: Start isEmpty. Operand 28844 states and 110400 transitions. [2021-06-12 22:04:08,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:08,777 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:08,777 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:08,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4049,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:08,977 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:08,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:08,978 INFO L82 PathProgramCache]: Analyzing trace with hash -36901476, now seen corresponding path program 133 times [2021-06-12 22:04:08,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:08,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505992895] [2021-06-12 22:04:08,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:08,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:09,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:09,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:09,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505992895] [2021-06-12 22:04:09,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505992895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:09,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987472580] [2021-06-12 22:04:09,011 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:09,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:09,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:04:09,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:09,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:09,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987472580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:09,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:09,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-12 22:04:09,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037206974] [2021-06-12 22:04:09,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:04:09,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:09,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:04:09,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:04:09,089 INFO L87 Difference]: Start difference. First operand 28844 states and 110400 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:09,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:09,728 INFO L93 Difference]: Finished difference Result 35179 states and 133683 transitions. [2021-06-12 22:04:09,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:04:09,728 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 [2021-06-12 22:04:09,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:09,815 INFO L225 Difference]: With dead ends: 35179 [2021-06-12 22:04:09,816 INFO L226 Difference]: Without dead ends: 35166 [2021-06-12 22:04:09,816 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 151.0ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:04:09,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35166 states. [2021-06-12 22:04:10,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35166 to 33639. [2021-06-12 22:04:10,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33639 states, 33638 states have (on average 3.8427968369106367) internal successors, (129264), 33638 states have internal predecessors, (129264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:10,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33639 states to 33639 states and 129264 transitions. [2021-06-12 22:04:10,855 INFO L78 Accepts]: Start accepts. Automaton has 33639 states and 129264 transitions. Word has length 28 [2021-06-12 22:04:10,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:10,855 INFO L482 AbstractCegarLoop]: Abstraction has 33639 states and 129264 transitions. [2021-06-12 22:04:10,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:10,855 INFO L276 IsEmpty]: Start isEmpty. Operand 33639 states and 129264 transitions. [2021-06-12 22:04:10,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:10,908 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:10,908 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:11,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4050,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:11,108 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:11,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:11,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1434176642, now seen corresponding path program 134 times [2021-06-12 22:04:11,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:11,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792697503] [2021-06-12 22:04:11,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:11,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:11,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:11,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:11,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792697503] [2021-06-12 22:04:11,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792697503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:11,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649252815] [2021-06-12 22:04:11,142 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:11,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:04:11,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:11,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:04:11,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:11,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649252815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:11,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:11,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-12 22:04:11,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728877056] [2021-06-12 22:04:11,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:04:11,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:11,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:04:11,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:04:11,218 INFO L87 Difference]: Start difference. First operand 33639 states and 129264 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:11,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:11,589 INFO L93 Difference]: Finished difference Result 36796 states and 139166 transitions. [2021-06-12 22:04:11,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:04:11,590 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 [2021-06-12 22:04:11,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:11,857 INFO L225 Difference]: With dead ends: 36796 [2021-06-12 22:04:11,857 INFO L226 Difference]: Without dead ends: 36796 [2021-06-12 22:04:11,857 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 134.1ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:04:11,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36796 states. [2021-06-12 22:04:12,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36796 to 33316. [2021-06-12 22:04:12,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33316 states, 33315 states have (on average 3.839021461803992) internal successors, (127897), 33315 states have internal predecessors, (127897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:12,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33316 states to 33316 states and 127897 transitions. [2021-06-12 22:04:12,583 INFO L78 Accepts]: Start accepts. Automaton has 33316 states and 127897 transitions. Word has length 28 [2021-06-12 22:04:12,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:12,583 INFO L482 AbstractCegarLoop]: Abstraction has 33316 states and 127897 transitions. [2021-06-12 22:04:12,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:12,583 INFO L276 IsEmpty]: Start isEmpty. Operand 33316 states and 127897 transitions. [2021-06-12 22:04:12,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:12,634 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:12,634 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:12,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4051 [2021-06-12 22:04:12,835 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:12,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:12,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1001300038, now seen corresponding path program 135 times [2021-06-12 22:04:12,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:12,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547050578] [2021-06-12 22:04:12,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:12,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:12,872 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:12,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:12,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547050578] [2021-06-12 22:04:12,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547050578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:12,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949974680] [2021-06-12 22:04:12,873 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:12,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:04:12,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:12,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:12,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:12,972 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:12,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949974680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:12,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:12,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:04:12,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745612835] [2021-06-12 22:04:12,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:04:12,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:12,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:04:12,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:04:12,973 INFO L87 Difference]: Start difference. First operand 33316 states and 127897 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-12 22:04:14,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:14,143 INFO L93 Difference]: Finished difference Result 39856 states and 149676 transitions. [2021-06-12 22:04:14,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 22:04:14,143 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 [2021-06-12 22:04:14,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:14,267 INFO L225 Difference]: With dead ends: 39856 [2021-06-12 22:04:14,267 INFO L226 Difference]: Without dead ends: 39848 [2021-06-12 22:04:14,268 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 381.5ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:04:14,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39848 states. [2021-06-12 22:04:15,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39848 to 33282. [2021-06-12 22:04:15,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33282 states, 33281 states have (on average 3.839427901805835) internal successors, (127780), 33281 states have internal predecessors, (127780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:15,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33282 states to 33282 states and 127780 transitions. [2021-06-12 22:04:15,636 INFO L78 Accepts]: Start accepts. Automaton has 33282 states and 127780 transitions. Word has length 28 [2021-06-12 22:04:15,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:15,636 INFO L482 AbstractCegarLoop]: Abstraction has 33282 states and 127780 transitions. [2021-06-12 22:04:15,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-12 22:04:15,637 INFO L276 IsEmpty]: Start isEmpty. Operand 33282 states and 127780 transitions. [2021-06-12 22:04:15,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:15,698 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:15,698 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:15,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4052,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:15,920 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:15,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:15,920 INFO L82 PathProgramCache]: Analyzing trace with hash 105479222, now seen corresponding path program 136 times [2021-06-12 22:04:15,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:15,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134171410] [2021-06-12 22:04:15,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:15,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:15,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:04:15,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:15,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134171410] [2021-06-12 22:04:15,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134171410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:15,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751326834] [2021-06-12 22:04:15,963 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:15,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:04:15,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:15,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:04:15,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:16,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:04:16,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751326834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:16,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:16,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-12 22:04:16,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426794167] [2021-06-12 22:04:16,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:04:16,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:16,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:04:16,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:04:16,054 INFO L87 Difference]: Start difference. First operand 33282 states and 127780 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:17,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:17,000 INFO L93 Difference]: Finished difference Result 36198 states and 137505 transitions. [2021-06-12 22:04:17,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:04:17,000 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 [2021-06-12 22:04:17,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:17,112 INFO L225 Difference]: With dead ends: 36198 [2021-06-12 22:04:17,112 INFO L226 Difference]: Without dead ends: 36198 [2021-06-12 22:04:17,112 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 248.9ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:04:17,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36198 states. [2021-06-12 22:04:18,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36198 to 33814. [2021-06-12 22:04:18,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33814 states, 33813 states have (on average 3.837695560878952) internal successors, (129764), 33813 states have internal predecessors, (129764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:18,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33814 states to 33814 states and 129764 transitions. [2021-06-12 22:04:18,755 INFO L78 Accepts]: Start accepts. Automaton has 33814 states and 129764 transitions. Word has length 28 [2021-06-12 22:04:18,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:18,755 INFO L482 AbstractCegarLoop]: Abstraction has 33814 states and 129764 transitions. [2021-06-12 22:04:18,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:18,756 INFO L276 IsEmpty]: Start isEmpty. Operand 33814 states and 129764 transitions. [2021-06-12 22:04:18,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:18,906 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:18,906 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:19,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4053 [2021-06-12 22:04:19,128 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:19,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:19,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1598636696, now seen corresponding path program 137 times [2021-06-12 22:04:19,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:19,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861136789] [2021-06-12 22:04:19,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:19,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:19,169 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:04:19,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:19,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861136789] [2021-06-12 22:04:19,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861136789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:19,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807792985] [2021-06-12 22:04:19,169 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:19,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:04:19,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:19,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:19,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:04:19,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807792985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:19,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:19,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:04:19,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343452618] [2021-06-12 22:04:19,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:04:19,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:19,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:04:19,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:04:19,285 INFO L87 Difference]: Start difference. First operand 33814 states and 129764 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-12 22:04:20,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:20,110 INFO L93 Difference]: Finished difference Result 40833 states and 153241 transitions. [2021-06-12 22:04:20,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:04:20,111 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 [2021-06-12 22:04:20,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:20,606 INFO L225 Difference]: With dead ends: 40833 [2021-06-12 22:04:20,606 INFO L226 Difference]: Without dead ends: 40809 [2021-06-12 22:04:20,606 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 371.2ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:04:20,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40809 states. [2021-06-12 22:04:21,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40809 to 33986. [2021-06-12 22:04:21,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33986 states, 33985 states have (on average 3.8339855818743565) internal successors, (130298), 33985 states have internal predecessors, (130298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:21,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33986 states to 33986 states and 130298 transitions. [2021-06-12 22:04:21,776 INFO L78 Accepts]: Start accepts. Automaton has 33986 states and 130298 transitions. Word has length 28 [2021-06-12 22:04:21,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:21,776 INFO L482 AbstractCegarLoop]: Abstraction has 33986 states and 130298 transitions. [2021-06-12 22:04:21,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-12 22:04:21,776 INFO L276 IsEmpty]: Start isEmpty. Operand 33986 states and 130298 transitions. [2021-06-12 22:04:21,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:21,843 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:21,843 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:22,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4054 [2021-06-12 22:04:22,061 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:22,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:22,061 INFO L82 PathProgramCache]: Analyzing trace with hash -252372998, now seen corresponding path program 138 times [2021-06-12 22:04:22,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:22,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262889231] [2021-06-12 22:04:22,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:22,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:22,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:22,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:22,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262889231] [2021-06-12 22:04:22,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262889231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:22,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584864398] [2021-06-12 22:04:22,110 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:22,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:04:22,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:22,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:04:22,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:22,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584864398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:22,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:22,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-12 22:04:22,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600268399] [2021-06-12 22:04:22,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:04:22,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:22,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:04:22,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:04:22,207 INFO L87 Difference]: Start difference. First operand 33986 states and 130298 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:22,619 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2021-06-12 22:04:23,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:23,039 INFO L93 Difference]: Finished difference Result 36618 states and 138998 transitions. [2021-06-12 22:04:23,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:04:23,040 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 [2021-06-12 22:04:23,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:23,134 INFO L225 Difference]: With dead ends: 36618 [2021-06-12 22:04:23,134 INFO L226 Difference]: Without dead ends: 36618 [2021-06-12 22:04:23,135 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 497.2ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:04:23,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36618 states. [2021-06-12 22:04:23,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36618 to 33912. [2021-06-12 22:04:23,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33912 states, 33911 states have (on average 3.8348028663265605) internal successors, (130042), 33911 states have internal predecessors, (130042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:24,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33912 states to 33912 states and 130042 transitions. [2021-06-12 22:04:24,157 INFO L78 Accepts]: Start accepts. Automaton has 33912 states and 130042 transitions. Word has length 28 [2021-06-12 22:04:24,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:24,157 INFO L482 AbstractCegarLoop]: Abstraction has 33912 states and 130042 transitions. [2021-06-12 22:04:24,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:24,157 INFO L276 IsEmpty]: Start isEmpty. Operand 33912 states and 130042 transitions. [2021-06-12 22:04:24,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:24,214 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:24,214 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:24,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4055 [2021-06-12 22:04:24,415 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:24,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:24,415 INFO L82 PathProgramCache]: Analyzing trace with hash 606143132, now seen corresponding path program 139 times [2021-06-12 22:04:24,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:24,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954448560] [2021-06-12 22:04:24,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:24,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:24,453 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:24,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:24,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954448560] [2021-06-12 22:04:24,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954448560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:24,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942404651] [2021-06-12 22:04:24,453 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:24,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:24,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:24,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942404651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:24,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:24,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 22:04:24,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081838030] [2021-06-12 22:04:24,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:04:24,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:24,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:04:24,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:04:24,534 INFO L87 Difference]: Start difference. First operand 33912 states and 130042 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-12 22:04:25,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:25,213 INFO L93 Difference]: Finished difference Result 40756 states and 152982 transitions. [2021-06-12 22:04:25,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 22:04:25,213 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 [2021-06-12 22:04:25,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:25,496 INFO L225 Difference]: With dead ends: 40756 [2021-06-12 22:04:25,496 INFO L226 Difference]: Without dead ends: 40716 [2021-06-12 22:04:25,497 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 322.5ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:04:25,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40716 states. [2021-06-12 22:04:26,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40716 to 34086. [2021-06-12 22:04:26,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34086 states, 34085 states have (on average 3.8309813701041513) internal successors, (130579), 34085 states have internal predecessors, (130579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:26,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34086 states to 34086 states and 130579 transitions. [2021-06-12 22:04:26,328 INFO L78 Accepts]: Start accepts. Automaton has 34086 states and 130579 transitions. Word has length 28 [2021-06-12 22:04:26,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:26,328 INFO L482 AbstractCegarLoop]: Abstraction has 34086 states and 130579 transitions. [2021-06-12 22:04:26,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-12 22:04:26,328 INFO L276 IsEmpty]: Start isEmpty. Operand 34086 states and 130579 transitions. [2021-06-12 22:04:26,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:26,383 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:26,383 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:26,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4056 [2021-06-12 22:04:26,584 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:26,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:26,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1649950116, now seen corresponding path program 140 times [2021-06-12 22:04:26,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:26,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972649626] [2021-06-12 22:04:26,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:26,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:26,616 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:26,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:26,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972649626] [2021-06-12 22:04:26,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972649626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:26,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122351739] [2021-06-12 22:04:26,616 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:26,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:04:26,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:26,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:26,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:26,759 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:26,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122351739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:26,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:26,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:04:26,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609071129] [2021-06-12 22:04:26,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:04:26,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:26,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:04:26,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:04:26,760 INFO L87 Difference]: Start difference. First operand 34086 states and 130579 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:28,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:28,433 INFO L93 Difference]: Finished difference Result 76027 states and 281494 transitions. [2021-06-12 22:04:28,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 22:04:28,433 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:28,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:28,617 INFO L225 Difference]: With dead ends: 76027 [2021-06-12 22:04:28,617 INFO L226 Difference]: Without dead ends: 76027 [2021-06-12 22:04:28,618 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 840.8ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 22:04:28,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76027 states. [2021-06-12 22:04:29,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76027 to 43183. [2021-06-12 22:04:29,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43183 states, 43182 states have (on average 3.906581445972859) internal successors, (168694), 43182 states have internal predecessors, (168694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:30,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43183 states to 43183 states and 168694 transitions. [2021-06-12 22:04:30,286 INFO L78 Accepts]: Start accepts. Automaton has 43183 states and 168694 transitions. Word has length 28 [2021-06-12 22:04:30,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:30,286 INFO L482 AbstractCegarLoop]: Abstraction has 43183 states and 168694 transitions. [2021-06-12 22:04:30,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:30,286 INFO L276 IsEmpty]: Start isEmpty. Operand 43183 states and 168694 transitions. [2021-06-12 22:04:30,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:30,371 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:30,372 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:30,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4057 [2021-06-12 22:04:30,572 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:30,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:30,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1082998036, now seen corresponding path program 141 times [2021-06-12 22:04:30,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:30,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480781210] [2021-06-12 22:04:30,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:30,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:30,603 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:30,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:30,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480781210] [2021-06-12 22:04:30,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480781210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:30,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768899887] [2021-06-12 22:04:30,604 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:30,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:04:30,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:30,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:30,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:30,726 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:30,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768899887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:30,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:30,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:04:30,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867117514] [2021-06-12 22:04:30,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:04:30,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:30,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:04:30,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:04:30,727 INFO L87 Difference]: Start difference. First operand 43183 states and 168694 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:32,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:32,177 INFO L93 Difference]: Finished difference Result 75388 states and 279801 transitions. [2021-06-12 22:04:32,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 22:04:32,178 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:32,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:32,368 INFO L225 Difference]: With dead ends: 75388 [2021-06-12 22:04:32,368 INFO L226 Difference]: Without dead ends: 75388 [2021-06-12 22:04:32,368 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 826.9ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 22:04:32,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75388 states. [2021-06-12 22:04:33,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75388 to 43180. [2021-06-12 22:04:33,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43180 states, 43179 states have (on average 3.906528636605757) internal successors, (168680), 43179 states have internal predecessors, (168680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:34,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43180 states to 43180 states and 168680 transitions. [2021-06-12 22:04:34,052 INFO L78 Accepts]: Start accepts. Automaton has 43180 states and 168680 transitions. Word has length 28 [2021-06-12 22:04:34,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:34,052 INFO L482 AbstractCegarLoop]: Abstraction has 43180 states and 168680 transitions. [2021-06-12 22:04:34,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:34,052 INFO L276 IsEmpty]: Start isEmpty. Operand 43180 states and 168680 transitions. [2021-06-12 22:04:34,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:34,118 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:34,118 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:34,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4058,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:34,319 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:34,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:34,319 INFO L82 PathProgramCache]: Analyzing trace with hash 2039623402, now seen corresponding path program 142 times [2021-06-12 22:04:34,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:34,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522541902] [2021-06-12 22:04:34,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:34,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:34,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:34,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522541902] [2021-06-12 22:04:34,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522541902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:34,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698337216] [2021-06-12 22:04:34,350 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:34,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:04:34,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:34,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:34,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:34,464 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:34,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698337216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:34,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:34,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:04:34,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770825926] [2021-06-12 22:04:34,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:04:34,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:34,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:04:34,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:04:34,465 INFO L87 Difference]: Start difference. First operand 43180 states and 168680 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:36,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:36,004 INFO L93 Difference]: Finished difference Result 69979 states and 261702 transitions. [2021-06-12 22:04:36,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 22:04:36,005 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:36,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:36,266 INFO L225 Difference]: With dead ends: 69979 [2021-06-12 22:04:36,266 INFO L226 Difference]: Without dead ends: 69979 [2021-06-12 22:04:36,266 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 575.7ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 22:04:36,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69979 states. [2021-06-12 22:04:37,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69979 to 43204. [2021-06-12 22:04:37,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43204 states, 43203 states have (on average 3.9067657338610746) internal successors, (168784), 43203 states have internal predecessors, (168784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:37,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43204 states to 43204 states and 168784 transitions. [2021-06-12 22:04:37,823 INFO L78 Accepts]: Start accepts. Automaton has 43204 states and 168784 transitions. Word has length 28 [2021-06-12 22:04:37,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:37,823 INFO L482 AbstractCegarLoop]: Abstraction has 43204 states and 168784 transitions. [2021-06-12 22:04:37,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:37,824 INFO L276 IsEmpty]: Start isEmpty. Operand 43204 states and 168784 transitions. [2021-06-12 22:04:38,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:38,090 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:38,090 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:38,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4059,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:38,305 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:38,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:38,305 INFO L82 PathProgramCache]: Analyzing trace with hash 2120999490, now seen corresponding path program 143 times [2021-06-12 22:04:38,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:38,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732261455] [2021-06-12 22:04:38,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:38,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:38,336 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:38,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:38,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732261455] [2021-06-12 22:04:38,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732261455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:38,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194359635] [2021-06-12 22:04:38,337 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:38,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:04:38,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:38,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:38,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:38,446 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:38,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194359635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:38,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:38,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:04:38,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786927860] [2021-06-12 22:04:38,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:04:38,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:38,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:04:38,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:04:38,447 INFO L87 Difference]: Start difference. First operand 43204 states and 168784 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:39,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:39,714 INFO L93 Difference]: Finished difference Result 69094 states and 259411 transitions. [2021-06-12 22:04:39,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 22:04:39,715 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:39,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:39,897 INFO L225 Difference]: With dead ends: 69094 [2021-06-12 22:04:39,898 INFO L226 Difference]: Without dead ends: 69086 [2021-06-12 22:04:39,898 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 495.5ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:04:39,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69086 states. [2021-06-12 22:04:41,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69086 to 43204. [2021-06-12 22:04:41,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43204 states, 43203 states have (on average 3.9066268546165777) internal successors, (168778), 43203 states have internal predecessors, (168778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:41,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43204 states to 43204 states and 168778 transitions. [2021-06-12 22:04:41,560 INFO L78 Accepts]: Start accepts. Automaton has 43204 states and 168778 transitions. Word has length 28 [2021-06-12 22:04:41,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:41,561 INFO L482 AbstractCegarLoop]: Abstraction has 43204 states and 168778 transitions. [2021-06-12 22:04:41,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:41,561 INFO L276 IsEmpty]: Start isEmpty. Operand 43204 states and 168778 transitions. [2021-06-12 22:04:41,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:41,649 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:41,649 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:41,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4060,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:41,863 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:41,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:41,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1243310590, now seen corresponding path program 144 times [2021-06-12 22:04:41,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:41,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248663079] [2021-06-12 22:04:41,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:41,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:41,895 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:41,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:41,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248663079] [2021-06-12 22:04:41,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248663079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:41,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605061572] [2021-06-12 22:04:41,895 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:41,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:04:41,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:41,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:41,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:42,017 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:42,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605061572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:42,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:42,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:04:42,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245472102] [2021-06-12 22:04:42,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:04:42,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:42,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:04:42,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:04:42,018 INFO L87 Difference]: Start difference. First operand 43204 states and 168778 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:43,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:43,331 INFO L93 Difference]: Finished difference Result 68768 states and 258526 transitions. [2021-06-12 22:04:43,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 22:04:43,332 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:43,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:43,516 INFO L225 Difference]: With dead ends: 68768 [2021-06-12 22:04:43,516 INFO L226 Difference]: Without dead ends: 68768 [2021-06-12 22:04:43,516 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 567.6ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 22:04:43,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68768 states. [2021-06-12 22:04:44,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68768 to 43212. [2021-06-12 22:04:44,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43212 states, 43211 states have (on average 3.9066904260489226) internal successors, (168812), 43211 states have internal predecessors, (168812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:45,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43212 states to 43212 states and 168812 transitions. [2021-06-12 22:04:45,167 INFO L78 Accepts]: Start accepts. Automaton has 43212 states and 168812 transitions. Word has length 28 [2021-06-12 22:04:45,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:45,167 INFO L482 AbstractCegarLoop]: Abstraction has 43212 states and 168812 transitions. [2021-06-12 22:04:45,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:45,167 INFO L276 IsEmpty]: Start isEmpty. Operand 43212 states and 168812 transitions. [2021-06-12 22:04:45,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:45,253 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:45,253 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:45,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4061 [2021-06-12 22:04:45,453 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:45,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:45,454 INFO L82 PathProgramCache]: Analyzing trace with hash 399728564, now seen corresponding path program 145 times [2021-06-12 22:04:45,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:45,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886494100] [2021-06-12 22:04:45,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:45,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:45,485 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:45,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:45,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886494100] [2021-06-12 22:04:45,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886494100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:45,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407282026] [2021-06-12 22:04:45,485 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:45,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:45,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:45,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:45,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:45,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407282026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:45,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:45,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:04:45,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53125679] [2021-06-12 22:04:45,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:04:45,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:45,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:04:45,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:04:45,602 INFO L87 Difference]: Start difference. First operand 43212 states and 168812 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:46,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:46,838 INFO L93 Difference]: Finished difference Result 68557 states and 258000 transitions. [2021-06-12 22:04:46,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 22:04:46,838 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:46,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:47,014 INFO L225 Difference]: With dead ends: 68557 [2021-06-12 22:04:47,014 INFO L226 Difference]: Without dead ends: 68549 [2021-06-12 22:04:47,015 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 497.8ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:04:47,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68549 states. [2021-06-12 22:04:48,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68549 to 43212. [2021-06-12 22:04:48,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43212 states, 43211 states have (on average 3.906644141538034) internal successors, (168810), 43211 states have internal predecessors, (168810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:48,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43212 states to 43212 states and 168810 transitions. [2021-06-12 22:04:48,446 INFO L78 Accepts]: Start accepts. Automaton has 43212 states and 168810 transitions. Word has length 28 [2021-06-12 22:04:48,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:48,446 INFO L482 AbstractCegarLoop]: Abstraction has 43212 states and 168810 transitions. [2021-06-12 22:04:48,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:48,446 INFO L276 IsEmpty]: Start isEmpty. Operand 43212 states and 168810 transitions. [2021-06-12 22:04:48,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:48,752 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:48,752 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:48,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4062,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:48,953 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:48,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:48,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1403156548, now seen corresponding path program 146 times [2021-06-12 22:04:48,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:48,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645785838] [2021-06-12 22:04:48,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:48,985 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:48,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:48,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645785838] [2021-06-12 22:04:48,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645785838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:48,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488713657] [2021-06-12 22:04:48,986 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:49,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:04:49,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:49,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:49,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:49,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:49,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488713657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:49,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:49,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-12 22:04:49,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103635948] [2021-06-12 22:04:49,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:04:49,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:49,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:04:49,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:04:49,092 INFO L87 Difference]: Start difference. First operand 43212 states and 168810 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:50,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:50,457 INFO L93 Difference]: Finished difference Result 67982 states and 254698 transitions. [2021-06-12 22:04:50,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 22:04:50,457 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:50,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:50,633 INFO L225 Difference]: With dead ends: 67982 [2021-06-12 22:04:50,634 INFO L226 Difference]: Without dead ends: 67982 [2021-06-12 22:04:50,634 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 607.5ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 22:04:50,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67982 states. [2021-06-12 22:04:51,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67982 to 46442. [2021-06-12 22:04:52,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46442 states, 46441 states have (on average 3.9102086518378156) internal successors, (181594), 46441 states have internal predecessors, (181594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:52,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46442 states to 46442 states and 181594 transitions. [2021-06-12 22:04:52,337 INFO L78 Accepts]: Start accepts. Automaton has 46442 states and 181594 transitions. Word has length 28 [2021-06-12 22:04:52,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:52,337 INFO L482 AbstractCegarLoop]: Abstraction has 46442 states and 181594 transitions. [2021-06-12 22:04:52,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:52,337 INFO L276 IsEmpty]: Start isEmpty. Operand 46442 states and 181594 transitions. [2021-06-12 22:04:52,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:52,439 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:52,439 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:52,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4063 [2021-06-12 22:04:52,649 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:52,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:52,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1484532636, now seen corresponding path program 147 times [2021-06-12 22:04:52,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:52,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449783623] [2021-06-12 22:04:52,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:52,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:52,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:52,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449783623] [2021-06-12 22:04:52,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449783623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:52,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688928014] [2021-06-12 22:04:52,681 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:52,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:04:52,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:52,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:52,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:52,779 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:52,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688928014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:52,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:52,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-12 22:04:52,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878913330] [2021-06-12 22:04:52,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:04:52,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:52,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:04:52,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:04:52,780 INFO L87 Difference]: Start difference. First operand 46442 states and 181594 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:53,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:53,996 INFO L93 Difference]: Finished difference Result 67509 states and 253442 transitions. [2021-06-12 22:04:53,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 22:04:53,997 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:53,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:54,168 INFO L225 Difference]: With dead ends: 67509 [2021-06-12 22:04:54,168 INFO L226 Difference]: Without dead ends: 67501 [2021-06-12 22:04:54,168 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 485.9ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:04:54,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67501 states. [2021-06-12 22:04:55,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67501 to 46136. [2021-06-12 22:04:55,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46136 states, 46135 states have (on average 3.9156172103608973) internal successors, (180647), 46135 states have internal predecessors, (180647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:55,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46136 states to 46136 states and 180647 transitions. [2021-06-12 22:04:55,901 INFO L78 Accepts]: Start accepts. Automaton has 46136 states and 180647 transitions. Word has length 28 [2021-06-12 22:04:55,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:55,901 INFO L482 AbstractCegarLoop]: Abstraction has 46136 states and 180647 transitions. [2021-06-12 22:04:55,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:55,901 INFO L276 IsEmpty]: Start isEmpty. Operand 46136 states and 180647 transitions. [2021-06-12 22:04:55,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:55,993 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:55,993 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:56,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4064 [2021-06-12 22:04:56,194 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:56,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:56,194 INFO L82 PathProgramCache]: Analyzing trace with hash -30559336, now seen corresponding path program 148 times [2021-06-12 22:04:56,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:56,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138347146] [2021-06-12 22:04:56,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:56,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:56,228 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:56,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:56,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138347146] [2021-06-12 22:04:56,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138347146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:56,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753094946] [2021-06-12 22:04:56,228 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:56,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:04:56,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:56,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:56,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:56,328 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:56,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753094946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:56,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:56,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-12 22:04:56,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943714710] [2021-06-12 22:04:56,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:04:56,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:56,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:04:56,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:04:56,328 INFO L87 Difference]: Start difference. First operand 46136 states and 180647 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:57,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:04:57,432 INFO L93 Difference]: Finished difference Result 65985 states and 249225 transitions. [2021-06-12 22:04:57,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:04:57,432 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:04:57,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:04:57,611 INFO L225 Difference]: With dead ends: 65985 [2021-06-12 22:04:57,611 INFO L226 Difference]: Without dead ends: 65961 [2021-06-12 22:04:57,612 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 362.2ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 22:04:57,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65961 states. [2021-06-12 22:04:58,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65961 to 46032. [2021-06-12 22:04:59,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46032 states, 46031 states have (on average 3.915600356281636) internal successors, (180239), 46031 states have internal predecessors, (180239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:59,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46032 states to 46032 states and 180239 transitions. [2021-06-12 22:04:59,174 INFO L78 Accepts]: Start accepts. Automaton has 46032 states and 180239 transitions. Word has length 28 [2021-06-12 22:04:59,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:04:59,174 INFO L482 AbstractCegarLoop]: Abstraction has 46032 states and 180239 transitions. [2021-06-12 22:04:59,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:04:59,174 INFO L276 IsEmpty]: Start isEmpty. Operand 46032 states and 180239 transitions. [2021-06-12 22:04:59,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:04:59,467 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:04:59,467 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:04:59,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4065,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:59,691 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:04:59,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:04:59,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1566567380, now seen corresponding path program 149 times [2021-06-12 22:04:59,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:04:59,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863832584] [2021-06-12 22:04:59,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:04:59,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:04:59,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:04:59,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:04:59,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863832584] [2021-06-12 22:04:59,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863832584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:59,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847580667] [2021-06-12 22:04:59,725 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:04:59,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:04:59,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:04:59,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:04:59,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:04:59,849 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:04:59,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847580667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:04:59,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:04:59,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:04:59,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781570417] [2021-06-12 22:04:59,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:04:59,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:04:59,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:04:59,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:04:59,850 INFO L87 Difference]: Start difference. First operand 46032 states and 180239 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:01,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:01,195 INFO L93 Difference]: Finished difference Result 67202 states and 252555 transitions. [2021-06-12 22:05:01,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 22:05:01,195 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:05:01,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:01,366 INFO L225 Difference]: With dead ends: 67202 [2021-06-12 22:05:01,366 INFO L226 Difference]: Without dead ends: 67202 [2021-06-12 22:05:01,366 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 602.3ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 22:05:01,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67202 states. [2021-06-12 22:05:02,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67202 to 46128. [2021-06-12 22:05:02,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46128 states, 46127 states have (on average 3.9142584603377633) internal successors, (180553), 46127 states have internal predecessors, (180553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:02,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46128 states to 46128 states and 180553 transitions. [2021-06-12 22:05:02,860 INFO L78 Accepts]: Start accepts. Automaton has 46128 states and 180553 transitions. Word has length 28 [2021-06-12 22:05:02,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:02,860 INFO L482 AbstractCegarLoop]: Abstraction has 46128 states and 180553 transitions. [2021-06-12 22:05:02,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:02,860 INFO L276 IsEmpty]: Start isEmpty. Operand 46128 states and 180553 transitions. [2021-06-12 22:05:03,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:05:03,159 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:03,159 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:05:03,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4066 [2021-06-12 22:05:03,373 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:03,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:03,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1085360762, now seen corresponding path program 150 times [2021-06-12 22:05:03,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:03,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509806048] [2021-06-12 22:05:03,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:03,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:03,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:05:03,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:03,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509806048] [2021-06-12 22:05:03,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509806048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:03,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600550895] [2021-06-12 22:05:03,409 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:03,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:05:03,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:03,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:05:03,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:03,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:03,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600550895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:03,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:03,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:05:03,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510389710] [2021-06-12 22:05:03,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:05:03,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:03,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:05:03,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:05:03,539 INFO L87 Difference]: Start difference. First operand 46128 states and 180553 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:04,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:04,808 INFO L93 Difference]: Finished difference Result 66883 states and 251651 transitions. [2021-06-12 22:05:04,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:05:04,808 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:05:04,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:04,978 INFO L225 Difference]: With dead ends: 66883 [2021-06-12 22:05:04,978 INFO L226 Difference]: Without dead ends: 66875 [2021-06-12 22:05:04,978 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 505.9ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:05:05,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66875 states. [2021-06-12 22:05:06,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66875 to 46060. [2021-06-12 22:05:06,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46060 states, 46059 states have (on average 3.9154345513363293) internal successors, (180341), 46059 states have internal predecessors, (180341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:06,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46060 states to 46060 states and 180341 transitions. [2021-06-12 22:05:06,430 INFO L78 Accepts]: Start accepts. Automaton has 46060 states and 180341 transitions. Word has length 28 [2021-06-12 22:05:06,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:06,430 INFO L482 AbstractCegarLoop]: Abstraction has 46060 states and 180341 transitions. [2021-06-12 22:05:06,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:06,430 INFO L276 IsEmpty]: Start isEmpty. Operand 46060 states and 180341 transitions. [2021-06-12 22:05:06,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:05:06,499 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:06,499 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:05:06,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4067 [2021-06-12 22:05:06,699 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:06,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:06,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1942149356, now seen corresponding path program 151 times [2021-06-12 22:05:06,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:06,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050997638] [2021-06-12 22:05:06,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:06,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:06,733 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:05:06,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:06,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050997638] [2021-06-12 22:05:06,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050997638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:06,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615883623] [2021-06-12 22:05:06,733 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:06,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:05:06,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:07,050 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:07,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615883623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:07,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:07,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:05:07,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252001885] [2021-06-12 22:05:07,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:05:07,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:07,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:05:07,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:05:07,051 INFO L87 Difference]: Start difference. First operand 46060 states and 180341 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:07,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:07,973 INFO L93 Difference]: Finished difference Result 65614 states and 248140 transitions. [2021-06-12 22:05:07,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 22:05:07,973 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:05:07,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:08,415 INFO L225 Difference]: With dead ends: 65614 [2021-06-12 22:05:08,415 INFO L226 Difference]: Without dead ends: 65590 [2021-06-12 22:05:08,415 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 373.4ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 22:05:08,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65590 states. [2021-06-12 22:05:09,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65590 to 46036. [2021-06-12 22:05:09,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46036 states, 46035 states have (on average 3.915564244596503) internal successors, (180253), 46035 states have internal predecessors, (180253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:09,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46036 states to 46036 states and 180253 transitions. [2021-06-12 22:05:09,855 INFO L78 Accepts]: Start accepts. Automaton has 46036 states and 180253 transitions. Word has length 28 [2021-06-12 22:05:09,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:09,855 INFO L482 AbstractCegarLoop]: Abstraction has 46036 states and 180253 transitions. [2021-06-12 22:05:09,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:09,855 INFO L276 IsEmpty]: Start isEmpty. Operand 46036 states and 180253 transitions. [2021-06-12 22:05:09,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:05:09,929 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:09,929 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:05:10,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4068 [2021-06-12 22:05:10,130 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:10,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:10,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1119483464, now seen corresponding path program 152 times [2021-06-12 22:05:10,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:10,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136866479] [2021-06-12 22:05:10,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:10,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:10,168 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:10,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:10,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136866479] [2021-06-12 22:05:10,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136866479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:10,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397885856] [2021-06-12 22:05:10,168 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:10,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:05:10,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:10,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:05:10,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:10,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:10,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397885856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:10,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:10,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:05:10,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089021408] [2021-06-12 22:05:10,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:05:10,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:10,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:05:10,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:05:10,266 INFO L87 Difference]: Start difference. First operand 46036 states and 180253 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-06-12 22:05:10,774 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 10 [2021-06-12 22:05:12,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:12,190 INFO L93 Difference]: Finished difference Result 68913 states and 257576 transitions. [2021-06-12 22:05:12,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-12 22:05:12,191 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 [2021-06-12 22:05:12,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:12,359 INFO L225 Difference]: With dead ends: 68913 [2021-06-12 22:05:12,360 INFO L226 Difference]: Without dead ends: 68913 [2021-06-12 22:05:12,360 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 1071.8ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-06-12 22:05:12,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68913 states. [2021-06-12 22:05:13,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68913 to 50828. [2021-06-12 22:05:13,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50828 states, 50827 states have (on average 3.8652881342593504) internal successors, (196461), 50827 states have internal predecessors, (196461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:14,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50828 states to 50828 states and 196461 transitions. [2021-06-12 22:05:14,222 INFO L78 Accepts]: Start accepts. Automaton has 50828 states and 196461 transitions. Word has length 28 [2021-06-12 22:05:14,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:14,222 INFO L482 AbstractCegarLoop]: Abstraction has 50828 states and 196461 transitions. [2021-06-12 22:05:14,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-06-12 22:05:14,222 INFO L276 IsEmpty]: Start isEmpty. Operand 50828 states and 196461 transitions. [2021-06-12 22:05:14,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:05:14,310 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:14,310 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:05:14,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4069,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:14,511 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:14,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:14,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1200859552, now seen corresponding path program 153 times [2021-06-12 22:05:14,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:14,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030434799] [2021-06-12 22:05:14,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:14,549 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:14,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:14,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030434799] [2021-06-12 22:05:14,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030434799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:14,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614472846] [2021-06-12 22:05:14,550 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:14,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:05:14,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:14,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:05:14,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:14,642 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:14,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614472846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:14,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:14,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:05:14,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933013290] [2021-06-12 22:05:14,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:05:14,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:14,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:05:14,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:05:14,643 INFO L87 Difference]: Start difference. First operand 50828 states and 196461 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-06-12 22:05:16,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:16,124 INFO L93 Difference]: Finished difference Result 68143 states and 255462 transitions. [2021-06-12 22:05:16,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 22:05:16,124 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 [2021-06-12 22:05:16,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:16,303 INFO L225 Difference]: With dead ends: 68143 [2021-06-12 22:05:16,304 INFO L226 Difference]: Without dead ends: 68135 [2021-06-12 22:05:16,304 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1927 ImplicationChecksByTransitivity, 669.8ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 22:05:16,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68135 states. [2021-06-12 22:05:17,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68135 to 49664. [2021-06-12 22:05:17,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49664 states, 49663 states have (on average 3.8827900046312145) internal successors, (192831), 49663 states have internal predecessors, (192831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:18,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49664 states to 49664 states and 192831 transitions. [2021-06-12 22:05:18,100 INFO L78 Accepts]: Start accepts. Automaton has 49664 states and 192831 transitions. Word has length 28 [2021-06-12 22:05:18,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:18,100 INFO L482 AbstractCegarLoop]: Abstraction has 49664 states and 192831 transitions. [2021-06-12 22:05:18,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-06-12 22:05:18,100 INFO L276 IsEmpty]: Start isEmpty. Operand 49664 states and 192831 transitions. [2021-06-12 22:05:18,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:05:18,164 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:18,164 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:05:18,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4070 [2021-06-12 22:05:18,365 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:18,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:18,365 INFO L82 PathProgramCache]: Analyzing trace with hash -314232420, now seen corresponding path program 154 times [2021-06-12 22:05:18,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:18,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011969055] [2021-06-12 22:05:18,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:18,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:18,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:18,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:18,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011969055] [2021-06-12 22:05:18,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011969055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:18,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83416877] [2021-06-12 22:05:18,407 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:18,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:05:18,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:18,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:05:18,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:18,500 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:18,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83416877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:18,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:18,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:05:18,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806155323] [2021-06-12 22:05:18,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:05:18,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:18,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:05:18,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:05:18,501 INFO L87 Difference]: Start difference. First operand 49664 states and 192831 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-06-12 22:05:20,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:20,002 INFO L93 Difference]: Finished difference Result 66443 states and 250710 transitions. [2021-06-12 22:05:20,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 22:05:20,002 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 [2021-06-12 22:05:20,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:20,257 INFO L225 Difference]: With dead ends: 66443 [2021-06-12 22:05:20,257 INFO L226 Difference]: Without dead ends: 66419 [2021-06-12 22:05:20,258 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 591.6ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 22:05:20,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66419 states. [2021-06-12 22:05:21,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66419 to 49644. [2021-06-12 22:05:21,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49644 states, 49643 states have (on average 3.8810507020123683) internal successors, (192667), 49643 states have internal predecessors, (192667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:21,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49644 states to 49644 states and 192667 transitions. [2021-06-12 22:05:21,897 INFO L78 Accepts]: Start accepts. Automaton has 49644 states and 192667 transitions. Word has length 28 [2021-06-12 22:05:21,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:21,897 INFO L482 AbstractCegarLoop]: Abstraction has 49644 states and 192667 transitions. [2021-06-12 22:05:21,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-06-12 22:05:21,897 INFO L276 IsEmpty]: Start isEmpty. Operand 49644 states and 192667 transitions. [2021-06-12 22:05:22,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:05:22,215 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:22,215 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:05:22,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4071,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:22,429 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:22,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:22,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1316197732, now seen corresponding path program 155 times [2021-06-12 22:05:22,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:22,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382927763] [2021-06-12 22:05:22,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:22,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:22,468 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:22,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:22,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382927763] [2021-06-12 22:05:22,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382927763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:22,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193802087] [2021-06-12 22:05:22,468 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:22,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:05:22,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:22,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:05:22,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:22,562 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:22,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193802087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:22,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:22,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:05:22,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31182269] [2021-06-12 22:05:22,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:05:22,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:22,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:05:22,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:05:22,563 INFO L87 Difference]: Start difference. First operand 49644 states and 192667 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-06-12 22:05:23,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:23,845 INFO L93 Difference]: Finished difference Result 67813 states and 254591 transitions. [2021-06-12 22:05:23,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 22:05:23,846 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 [2021-06-12 22:05:23,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:24,026 INFO L225 Difference]: With dead ends: 67813 [2021-06-12 22:05:24,026 INFO L226 Difference]: Without dead ends: 67773 [2021-06-12 22:05:24,026 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 530.0ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:05:24,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67773 states. [2021-06-12 22:05:25,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67773 to 49798. [2021-06-12 22:05:25,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49798 states, 49797 states have (on average 3.880394401269153) internal successors, (193232), 49797 states have internal predecessors, (193232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:25,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49798 states to 49798 states and 193232 transitions. [2021-06-12 22:05:25,545 INFO L78 Accepts]: Start accepts. Automaton has 49798 states and 193232 transitions. Word has length 28 [2021-06-12 22:05:25,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:25,545 INFO L482 AbstractCegarLoop]: Abstraction has 49798 states and 193232 transitions. [2021-06-12 22:05:25,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-06-12 22:05:25,545 INFO L276 IsEmpty]: Start isEmpty. Operand 49798 states and 193232 transitions. [2021-06-12 22:05:25,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:05:25,843 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:25,843 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:05:26,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4072 [2021-06-12 22:05:26,057 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:26,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:26,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1262992088, now seen corresponding path program 156 times [2021-06-12 22:05:26,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:26,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285228192] [2021-06-12 22:05:26,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:26,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:26,096 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:26,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:26,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285228192] [2021-06-12 22:05:26,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285228192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:26,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435115042] [2021-06-12 22:05:26,097 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:26,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:05:26,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:26,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:05:26,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:26,232 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:26,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435115042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:26,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:26,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:05:26,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930941943] [2021-06-12 22:05:26,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:05:26,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:26,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:05:26,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:05:26,233 INFO L87 Difference]: Start difference. First operand 49798 states and 193232 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:27,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:27,910 INFO L93 Difference]: Finished difference Result 66932 states and 251929 transitions. [2021-06-12 22:05:27,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-12 22:05:27,910 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:05:27,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:28,110 INFO L225 Difference]: With dead ends: 66932 [2021-06-12 22:05:28,110 INFO L226 Difference]: Without dead ends: 66932 [2021-06-12 22:05:28,110 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 1030.8ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 22:05:28,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66932 states. [2021-06-12 22:05:29,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66932 to 50703. [2021-06-12 22:05:29,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50703 states, 50702 states have (on average 3.871701313557651) internal successors, (196303), 50702 states have internal predecessors, (196303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:29,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50703 states to 50703 states and 196303 transitions. [2021-06-12 22:05:29,909 INFO L78 Accepts]: Start accepts. Automaton has 50703 states and 196303 transitions. Word has length 28 [2021-06-12 22:05:29,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:29,909 INFO L482 AbstractCegarLoop]: Abstraction has 50703 states and 196303 transitions. [2021-06-12 22:05:29,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:29,909 INFO L276 IsEmpty]: Start isEmpty. Operand 50703 states and 196303 transitions. [2021-06-12 22:05:29,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:05:29,987 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:29,987 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:05:30,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4073,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:30,188 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:30,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:30,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1388936054, now seen corresponding path program 157 times [2021-06-12 22:05:30,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:30,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018752085] [2021-06-12 22:05:30,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:30,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:30,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:30,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:30,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018752085] [2021-06-12 22:05:30,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018752085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:30,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578663296] [2021-06-12 22:05:30,230 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:30,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:05:30,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:30,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:30,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578663296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:30,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:30,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:05:30,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354471585] [2021-06-12 22:05:30,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:05:30,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:30,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:05:30,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:05:30,353 INFO L87 Difference]: Start difference. First operand 50703 states and 196303 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:31,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:31,805 INFO L93 Difference]: Finished difference Result 66428 states and 250518 transitions. [2021-06-12 22:05:31,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 22:05:31,806 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:05:31,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:31,992 INFO L225 Difference]: With dead ends: 66428 [2021-06-12 22:05:31,992 INFO L226 Difference]: Without dead ends: 66420 [2021-06-12 22:05:31,992 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 866.4ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 22:05:32,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66420 states. [2021-06-12 22:05:33,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66420 to 50627. [2021-06-12 22:05:33,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50627 states, 50626 states have (on average 3.8728518942835697) internal successors, (196067), 50626 states have internal predecessors, (196067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:33,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50627 states to 50627 states and 196067 transitions. [2021-06-12 22:05:33,727 INFO L78 Accepts]: Start accepts. Automaton has 50627 states and 196067 transitions. Word has length 28 [2021-06-12 22:05:33,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:33,727 INFO L482 AbstractCegarLoop]: Abstraction has 50627 states and 196067 transitions. [2021-06-12 22:05:33,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:33,727 INFO L276 IsEmpty]: Start isEmpty. Operand 50627 states and 196067 transitions. [2021-06-12 22:05:33,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:05:33,798 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:33,798 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:05:33,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4074 [2021-06-12 22:05:33,998 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:33,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:33,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1638574064, now seen corresponding path program 158 times [2021-06-12 22:05:33,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:33,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935622011] [2021-06-12 22:05:33,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:34,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:34,037 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:34,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:34,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935622011] [2021-06-12 22:05:34,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935622011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:34,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799501686] [2021-06-12 22:05:34,038 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:34,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:05:34,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:34,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:05:34,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:34,150 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:34,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799501686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:34,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:34,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:05:34,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579464630] [2021-06-12 22:05:34,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:05:34,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:34,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:05:34,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:05:34,151 INFO L87 Difference]: Start difference. First operand 50627 states and 196067 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:35,013 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-06-12 22:05:35,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:35,469 INFO L93 Difference]: Finished difference Result 65905 states and 249272 transitions. [2021-06-12 22:05:35,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 22:05:35,470 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:05:35,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:35,651 INFO L225 Difference]: With dead ends: 65905 [2021-06-12 22:05:35,651 INFO L226 Difference]: Without dead ends: 65881 [2021-06-12 22:05:35,651 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 757.5ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:05:35,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65881 states. [2021-06-12 22:05:37,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65881 to 50613. [2021-06-12 22:05:37,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50613 states, 50612 states have (on average 3.872836481466846) internal successors, (196012), 50612 states have internal predecessors, (196012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:37,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50613 states to 50613 states and 196012 transitions. [2021-06-12 22:05:37,401 INFO L78 Accepts]: Start accepts. Automaton has 50613 states and 196012 transitions. Word has length 28 [2021-06-12 22:05:37,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:37,401 INFO L482 AbstractCegarLoop]: Abstraction has 50613 states and 196012 transitions. [2021-06-12 22:05:37,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:37,401 INFO L276 IsEmpty]: Start isEmpty. Operand 50613 states and 196012 transitions. [2021-06-12 22:05:37,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:05:37,477 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:37,477 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:05:37,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4075,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:37,677 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:37,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:37,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1972807316, now seen corresponding path program 159 times [2021-06-12 22:05:37,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:37,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107854344] [2021-06-12 22:05:37,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:37,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:37,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:37,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107854344] [2021-06-12 22:05:37,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107854344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:37,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877875516] [2021-06-12 22:05:37,724 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:37,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:05:37,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:37,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:05:37,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:37,826 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:37,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877875516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:37,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:37,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 22:05:37,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362346634] [2021-06-12 22:05:37,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:05:37,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:37,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:05:37,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:05:37,827 INFO L87 Difference]: Start difference. First operand 50613 states and 196012 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:39,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:39,142 INFO L93 Difference]: Finished difference Result 65687 states and 248579 transitions. [2021-06-12 22:05:39,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 22:05:39,142 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:05:39,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:39,330 INFO L225 Difference]: With dead ends: 65687 [2021-06-12 22:05:39,330 INFO L226 Difference]: Without dead ends: 65647 [2021-06-12 22:05:39,331 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 743.5ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:05:39,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65647 states. [2021-06-12 22:05:40,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65647 to 50962. [2021-06-12 22:05:40,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50962 states, 50961 states have (on average 3.874354898844214) internal successors, (197441), 50961 states have internal predecessors, (197441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:41,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50962 states to 50962 states and 197441 transitions. [2021-06-12 22:05:41,064 INFO L78 Accepts]: Start accepts. Automaton has 50962 states and 197441 transitions. Word has length 28 [2021-06-12 22:05:41,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:41,064 INFO L482 AbstractCegarLoop]: Abstraction has 50962 states and 197441 transitions. [2021-06-12 22:05:41,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:41,064 INFO L276 IsEmpty]: Start isEmpty. Operand 50962 states and 197441 transitions. [2021-06-12 22:05:41,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:05:41,138 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:41,138 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:05:41,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4076 [2021-06-12 22:05:41,338 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:41,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:41,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1825824890, now seen corresponding path program 160 times [2021-06-12 22:05:41,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:41,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862782769] [2021-06-12 22:05:41,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:41,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:41,392 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:41,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:41,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862782769] [2021-06-12 22:05:41,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862782769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:41,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990230976] [2021-06-12 22:05:41,392 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:41,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:05:41,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:41,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:05:41,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:41,513 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:41,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990230976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:41,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:41,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:05:41,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563474122] [2021-06-12 22:05:41,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:05:41,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:41,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:05:41,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:05:41,513 INFO L87 Difference]: Start difference. First operand 50962 states and 197441 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:43,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:43,045 INFO L93 Difference]: Finished difference Result 79769 states and 298419 transitions. [2021-06-12 22:05:43,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 22:05:43,046 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:05:43,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:43,475 INFO L225 Difference]: With dead ends: 79769 [2021-06-12 22:05:43,475 INFO L226 Difference]: Without dead ends: 79769 [2021-06-12 22:05:43,475 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 616.3ms TimeCoverageRelationStatistics Valid=901, Invalid=3131, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 22:05:43,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79769 states. [2021-06-12 22:05:44,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79769 to 52128. [2021-06-12 22:05:44,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52128 states, 52127 states have (on average 3.8865846873980856) internal successors, (202596), 52127 states have internal predecessors, (202596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:45,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52128 states to 52128 states and 202596 transitions. [2021-06-12 22:05:45,079 INFO L78 Accepts]: Start accepts. Automaton has 52128 states and 202596 transitions. Word has length 28 [2021-06-12 22:05:45,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:45,079 INFO L482 AbstractCegarLoop]: Abstraction has 52128 states and 202596 transitions. [2021-06-12 22:05:45,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:45,079 INFO L276 IsEmpty]: Start isEmpty. Operand 52128 states and 202596 transitions. [2021-06-12 22:05:45,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:05:45,156 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:45,156 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:05:45,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4077 [2021-06-12 22:05:45,357 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:45,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:45,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1151103012, now seen corresponding path program 161 times [2021-06-12 22:05:45,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:45,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28471379] [2021-06-12 22:05:45,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:45,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:45,624 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-06-12 22:05:45,678 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:45,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:45,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28471379] [2021-06-12 22:05:45,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28471379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:45,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749539016] [2021-06-12 22:05:45,679 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:45,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:05:45,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:45,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:05:45,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:45,823 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:45,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749539016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:45,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:45,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:05:45,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187007629] [2021-06-12 22:05:45,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:05:45,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:45,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:05:45,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:05:45,825 INFO L87 Difference]: Start difference. First operand 52128 states and 202596 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:47,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:47,201 INFO L93 Difference]: Finished difference Result 72910 states and 276752 transitions. [2021-06-12 22:05:47,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 22:05:47,201 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:05:47,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:47,397 INFO L225 Difference]: With dead ends: 72910 [2021-06-12 22:05:47,397 INFO L226 Difference]: Without dead ends: 72910 [2021-06-12 22:05:47,397 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 565.3ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:05:47,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72910 states. [2021-06-12 22:05:48,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72910 to 52158. [2021-06-12 22:05:48,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52158 states, 52157 states have (on average 3.886400674885442) internal successors, (202703), 52157 states have internal predecessors, (202703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:49,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52158 states to 52158 states and 202703 transitions. [2021-06-12 22:05:49,270 INFO L78 Accepts]: Start accepts. Automaton has 52158 states and 202703 transitions. Word has length 28 [2021-06-12 22:05:49,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:49,270 INFO L482 AbstractCegarLoop]: Abstraction has 52158 states and 202703 transitions. [2021-06-12 22:05:49,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:49,270 INFO L276 IsEmpty]: Start isEmpty. Operand 52158 states and 202703 transitions. [2021-06-12 22:05:49,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:05:49,354 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:49,354 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:05:49,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4078 [2021-06-12 22:05:49,554 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:49,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:49,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1490504108, now seen corresponding path program 162 times [2021-06-12 22:05:49,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:49,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586170610] [2021-06-12 22:05:49,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:49,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:49,605 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:49,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:49,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586170610] [2021-06-12 22:05:49,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586170610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:49,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791662128] [2021-06-12 22:05:49,605 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:49,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:05:49,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:49,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:05:49,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:49,760 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:49,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791662128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:49,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:49,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:05:49,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872010091] [2021-06-12 22:05:49,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:05:49,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:49,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:05:49,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:05:49,761 INFO L87 Difference]: Start difference. First operand 52158 states and 202703 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:51,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:51,656 INFO L93 Difference]: Finished difference Result 73768 states and 279188 transitions. [2021-06-12 22:05:51,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-12 22:05:51,657 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:05:51,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:51,852 INFO L225 Difference]: With dead ends: 73768 [2021-06-12 22:05:51,852 INFO L226 Difference]: Without dead ends: 73768 [2021-06-12 22:05:51,853 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 1003.9ms TimeCoverageRelationStatistics Valid=1557, Invalid=5925, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 22:05:52,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73768 states. [2021-06-12 22:05:53,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73768 to 52422. [2021-06-12 22:05:53,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52422 states, 52421 states have (on average 3.8831956658591023) internal successors, (203561), 52421 states have internal predecessors, (203561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:53,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52422 states to 52422 states and 203561 transitions. [2021-06-12 22:05:53,561 INFO L78 Accepts]: Start accepts. Automaton has 52422 states and 203561 transitions. Word has length 28 [2021-06-12 22:05:53,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:53,561 INFO L482 AbstractCegarLoop]: Abstraction has 52422 states and 203561 transitions. [2021-06-12 22:05:53,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:53,561 INFO L276 IsEmpty]: Start isEmpty. Operand 52422 states and 203561 transitions. [2021-06-12 22:05:53,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:05:53,638 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:53,638 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:05:53,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4079 [2021-06-12 22:05:53,838 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:53,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:53,839 INFO L82 PathProgramCache]: Analyzing trace with hash 152535046, now seen corresponding path program 163 times [2021-06-12 22:05:53,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:53,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938880599] [2021-06-12 22:05:53,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:53,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:53,876 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:53,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:53,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938880599] [2021-06-12 22:05:53,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938880599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:53,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273742389] [2021-06-12 22:05:53,876 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:53,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:05:53,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:53,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273742389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:53,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:53,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:05:53,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200253160] [2021-06-12 22:05:53,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:05:53,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:53,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:05:53,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:05:53,996 INFO L87 Difference]: Start difference. First operand 52422 states and 203561 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:55,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:55,857 INFO L93 Difference]: Finished difference Result 72980 states and 276953 transitions. [2021-06-12 22:05:55,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 22:05:55,858 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:05:55,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:56,051 INFO L225 Difference]: With dead ends: 72980 [2021-06-12 22:05:56,051 INFO L226 Difference]: Without dead ends: 72976 [2021-06-12 22:05:56,051 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1775 ImplicationChecksByTransitivity, 736.7ms TimeCoverageRelationStatistics Valid=1139, Invalid=3831, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 22:05:56,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72976 states. [2021-06-12 22:05:57,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72976 to 52058. [2021-06-12 22:05:57,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52058 states, 52057 states have (on average 3.8866050675221393) internal successors, (202325), 52057 states have internal predecessors, (202325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:57,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52058 states to 52058 states and 202325 transitions. [2021-06-12 22:05:57,865 INFO L78 Accepts]: Start accepts. Automaton has 52058 states and 202325 transitions. Word has length 28 [2021-06-12 22:05:57,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:05:57,865 INFO L482 AbstractCegarLoop]: Abstraction has 52058 states and 202325 transitions. [2021-06-12 22:05:57,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:57,865 INFO L276 IsEmpty]: Start isEmpty. Operand 52058 states and 202325 transitions. [2021-06-12 22:05:57,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:05:57,947 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:05:57,947 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:05:58,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4080 [2021-06-12 22:05:58,148 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:05:58,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:05:58,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1936993134, now seen corresponding path program 164 times [2021-06-12 22:05:58,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:05:58,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251799607] [2021-06-12 22:05:58,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:05:58,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:05:58,194 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:58,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:05:58,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251799607] [2021-06-12 22:05:58,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251799607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:58,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112909403] [2021-06-12 22:05:58,195 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:05:58,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:05:58,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:05:58,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:05:58,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:05:58,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:05:58,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112909403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:05:58,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:05:58,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:05:58,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432871208] [2021-06-12 22:05:58,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:05:58,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:05:58,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:05:58,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:05:58,343 INFO L87 Difference]: Start difference. First operand 52058 states and 202325 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:05:59,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:05:59,507 INFO L93 Difference]: Finished difference Result 66943 states and 255942 transitions. [2021-06-12 22:05:59,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:05:59,508 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:05:59,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:05:59,676 INFO L225 Difference]: With dead ends: 66943 [2021-06-12 22:05:59,676 INFO L226 Difference]: Without dead ends: 66943 [2021-06-12 22:05:59,677 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 494.8ms TimeCoverageRelationStatistics Valid=608, Invalid=2148, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 22:05:59,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66943 states. [2021-06-12 22:06:00,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66943 to 52074. [2021-06-12 22:06:01,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52074 states, 52073 states have (on average 3.8882530294010333) internal successors, (202473), 52073 states have internal predecessors, (202473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:01,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52074 states to 52074 states and 202473 transitions. [2021-06-12 22:06:01,570 INFO L78 Accepts]: Start accepts. Automaton has 52074 states and 202473 transitions. Word has length 28 [2021-06-12 22:06:01,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:06:01,571 INFO L482 AbstractCegarLoop]: Abstraction has 52074 states and 202473 transitions. [2021-06-12 22:06:01,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:01,571 INFO L276 IsEmpty]: Start isEmpty. Operand 52074 states and 202473 transitions. [2021-06-12 22:06:01,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:06:01,731 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:06:01,731 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:06:01,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4081,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:06:01,945 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:06:01,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:06:01,945 INFO L82 PathProgramCache]: Analyzing trace with hash -756673454, now seen corresponding path program 165 times [2021-06-12 22:06:01,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:06:01,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159052781] [2021-06-12 22:06:01,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:06:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:06:01,992 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:06:01,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:06:01,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159052781] [2021-06-12 22:06:01,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159052781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:06:01,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929526688] [2021-06-12 22:06:01,992 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:06:02,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:06:02,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:06:02,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:06:02,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:06:02,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:06:02,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929526688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:06:02,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:06:02,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:06:02,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979065669] [2021-06-12 22:06:02,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:06:02,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:06:02,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:06:02,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:06:02,131 INFO L87 Difference]: Start difference. First operand 52074 states and 202473 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:06:05,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:06:05,434 INFO L93 Difference]: Finished difference Result 66257 states and 254067 transitions. [2021-06-12 22:06:05,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:06:05,434 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:06:05,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:06:05,606 INFO L225 Difference]: With dead ends: 66257 [2021-06-12 22:06:05,606 INFO L226 Difference]: Without dead ends: 66245 [2021-06-12 22:06:05,607 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 434.5ms TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 22:06:05,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66245 states.