/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-sum.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 16:03:57,331 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 16:03:57,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 16:03:57,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 16:03:57,422 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-03 16:03:57,425 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-03 16:03:57,427 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-03 16:03:57,430 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-03 16:03:57,434 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-03 16:03:57,436 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-03 16:03:57,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-03 16:03:57,448 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-03 16:03:57,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-03 16:03:57,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-03 16:03:57,454 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-03 16:03:57,457 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-03 16:03:57,466 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-03 16:03:57,479 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 16:03:57,480 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 16:03:57,480 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 16:03:57,482 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-05-03 16:03:57,533 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 16:03:57,534 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 16:03:57,535 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 16:03:57,535 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 16:03:57,539 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 16:03:57,540 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 16:03:57,540 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 16:03:57,541 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 16:03:57,541 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 16:03:57,541 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 16:03:57,542 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 16:03:57,542 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 16:03:57,542 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 16:03:57,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 16:03:57,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 16:03:57,542 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 16:03:57,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 16:03:57,543 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 16:03:57,543 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 16:03:57,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 16:03:57,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 16:03:57,543 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 16:03:57,543 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 16:03:57,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 16:03:57,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 16:03:57,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 16:03:57,544 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 16:03:57,544 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 16:03:57,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 16:03:57,544 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 16:03:57,544 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 16:03:57,545 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 16:03:58,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 16:03:58,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 16:03:58,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 16:03:58,048 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 16:03:58,054 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 16:03:58,056 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-sum.wvr.bpl [2021-05-03 16:03:58,056 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-sum.wvr.bpl' [2021-05-03 16:03:58,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 16:03:58,104 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 16:03:58,110 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 16:03:58,110 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 16:03:58,110 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 16:03:58,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:03:58" (1/1) ... [2021-05-03 16:03:58,131 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:03:58" (1/1) ... [2021-05-03 16:03:58,142 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 16:03:58,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 16:03:58,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 16:03:58,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 16:03:58,157 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:03:58" (1/1) ... [2021-05-03 16:03:58,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:03:58" (1/1) ... [2021-05-03 16:03:58,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:03:58" (1/1) ... [2021-05-03 16:03:58,161 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:03:58" (1/1) ... [2021-05-03 16:03:58,166 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:03:58" (1/1) ... [2021-05-03 16:03:58,171 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:03:58" (1/1) ... [2021-05-03 16:03:58,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:03:58" (1/1) ... [2021-05-03 16:03:58,180 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 16:03:58,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 16:03:58,184 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 16:03:58,184 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 16:03:58,188 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:03:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 16:03:58,278 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 16:03:58,278 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 16:03:58,278 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 16:03:58,279 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 16:03:58,279 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 16:03:58,279 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 16:03:58,279 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 16:03:58,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 16:03:58,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 16:03:58,279 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-03 16:03:58,280 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-03 16:03:58,280 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-03 16:03:58,284 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 16:03:58,602 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 16:03:58,603 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-03 16:03:58,605 INFO L202 PluginConnector]: Adding new model three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 04:03:58 BoogieIcfgContainer [2021-05-03 16:03:58,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 16:03:58,606 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 16:03:58,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 16:03:58,609 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 16:03:58,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:03:58" (1/2) ... [2021-05-03 16:03:58,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34de9067 and model type three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 04:03:58, skipping insertion in model container [2021-05-03 16:03:58,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 04:03:58" (2/2) ... [2021-05-03 16:03:58,611 INFO L111 eAbstractionObserver]: Analyzing ICFG three-array-sum.wvr.bpl [2021-05-03 16:03:58,616 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 16:03:58,616 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 16:03:58,619 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 16:03:58,620 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 16:03:58,728 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-03 16:03:58,750 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-03 16:03:58,771 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 16:03:58,771 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 16:03:58,771 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 16:03:58,771 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 16:03:58,771 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 16:03:58,772 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 16:03:58,772 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 16:03:58,772 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 16:03:58,784 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 35 places, 29 transitions, 82 flow [2021-05-03 16:03:58,818 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 133 states, 131 states have (on average 3.015267175572519) internal successors, (395), 132 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:03:58,824 INFO L276 IsEmpty]: Start isEmpty. Operand has 133 states, 131 states have (on average 3.015267175572519) internal successors, (395), 132 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:03:58,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 16:03:58,839 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:03:58,840 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:03:58,841 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:03:58,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:03:58,856 INFO L82 PathProgramCache]: Analyzing trace with hash 462888317, now seen corresponding path program 1 times [2021-05-03 16:03:58,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:03:58,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548746660] [2021-05-03 16:03:58,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:03:58,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:03:59,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:03:59,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548746660] [2021-05-03 16:03:59,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:03:59,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-03 16:03:59,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680837964] [2021-05-03 16:03:59,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 16:03:59,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:03:59,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 16:03:59,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:03:59,255 INFO L87 Difference]: Start difference. First operand has 133 states, 131 states have (on average 3.015267175572519) internal successors, (395), 132 states have internal predecessors, (395), 0 states have call successors, (0), 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 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:03:59,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:03:59,312 INFO L93 Difference]: Finished difference Result 257 states and 781 transitions. [2021-05-03 16:03:59,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 16:03:59,314 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 16:03:59,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:03:59,336 INFO L225 Difference]: With dead ends: 257 [2021-05-03 16:03:59,337 INFO L226 Difference]: Without dead ends: 230 [2021-05-03 16:03:59,338 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:03:59,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-05-03 16:03:59,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 188. [2021-05-03 16:03:59,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 3.0802139037433154) internal successors, (576), 187 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:03:59,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 576 transitions. [2021-05-03 16:03:59,400 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 576 transitions. Word has length 16 [2021-05-03 16:03:59,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:03:59,402 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 576 transitions. [2021-05-03 16:03:59,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:03:59,403 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 576 transitions. [2021-05-03 16:03:59,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 16:03:59,406 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:03:59,406 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:03:59,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 16:03:59,407 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:03:59,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:03:59,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1780859517, now seen corresponding path program 1 times [2021-05-03 16:03:59,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:03:59,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354272562] [2021-05-03 16:03:59,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:03:59,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:03:59,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:03:59,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354272562] [2021-05-03 16:03:59,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:03:59,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 16:03:59,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191147546] [2021-05-03 16:03:59,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 16:03:59,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:03:59,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 16:03:59,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 16:03:59,458 INFO L87 Difference]: Start difference. First operand 188 states and 576 transitions. Second operand has 4 states, 4 states have (on average 4.5) 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) [2021-05-03 16:03:59,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:03:59,517 INFO L93 Difference]: Finished difference Result 355 states and 1087 transitions. [2021-05-03 16:03:59,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 16:03:59,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) 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 [2021-05-03 16:03:59,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:03:59,526 INFO L225 Difference]: With dead ends: 355 [2021-05-03 16:03:59,526 INFO L226 Difference]: Without dead ends: 355 [2021-05-03 16:03:59,527 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 16:03:59,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-05-03 16:03:59,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 213. [2021-05-03 16:03:59,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 3.1792452830188678) internal successors, (674), 212 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:03:59,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 674 transitions. [2021-05-03 16:03:59,557 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 674 transitions. Word has length 18 [2021-05-03 16:03:59,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:03:59,558 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 674 transitions. [2021-05-03 16:03:59,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) 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) [2021-05-03 16:03:59,558 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 674 transitions. [2021-05-03 16:03:59,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 16:03:59,560 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:03:59,561 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:03:59,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 16:03:59,561 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:03:59,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:03:59,562 INFO L82 PathProgramCache]: Analyzing trace with hash 2008080897, now seen corresponding path program 2 times [2021-05-03 16:03:59,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:03:59,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468175173] [2021-05-03 16:03:59,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:03:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:03:59,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:03:59,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468175173] [2021-05-03 16:03:59,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:03:59,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 16:03:59,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183886615] [2021-05-03 16:03:59,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 16:03:59,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:03:59,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 16:03:59,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:03:59,620 INFO L87 Difference]: Start difference. First operand 213 states and 674 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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) [2021-05-03 16:03:59,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:03:59,733 INFO L93 Difference]: Finished difference Result 450 states and 1348 transitions. [2021-05-03 16:03:59,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 16:03:59,738 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 [2021-05-03 16:03:59,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:03:59,743 INFO L225 Difference]: With dead ends: 450 [2021-05-03 16:03:59,743 INFO L226 Difference]: Without dead ends: 450 [2021-05-03 16:03:59,744 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:03:59,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-05-03 16:03:59,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 235. [2021-05-03 16:03:59,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 3.1837606837606836) internal successors, (745), 234 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:03:59,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 745 transitions. [2021-05-03 16:03:59,783 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 745 transitions. Word has length 18 [2021-05-03 16:03:59,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:03:59,783 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 745 transitions. [2021-05-03 16:03:59,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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) [2021-05-03 16:03:59,784 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 745 transitions. [2021-05-03 16:03:59,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 16:03:59,786 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:03:59,786 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:03:59,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 16:03:59,787 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:03:59,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:03:59,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1920787651, now seen corresponding path program 3 times [2021-05-03 16:03:59,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:03:59,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339225291] [2021-05-03 16:03:59,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:03:59,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:03:59,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:03:59,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339225291] [2021-05-03 16:03:59,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:03:59,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 16:03:59,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483747650] [2021-05-03 16:03:59,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 16:03:59,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:03:59,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 16:03:59,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 16:03:59,831 INFO L87 Difference]: Start difference. First operand 235 states and 745 transitions. Second operand has 4 states, 4 states have (on average 4.5) 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) [2021-05-03 16:03:59,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:03:59,897 INFO L93 Difference]: Finished difference Result 349 states and 1037 transitions. [2021-05-03 16:03:59,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 16:03:59,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) 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 [2021-05-03 16:03:59,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:03:59,901 INFO L225 Difference]: With dead ends: 349 [2021-05-03 16:03:59,902 INFO L226 Difference]: Without dead ends: 345 [2021-05-03 16:03:59,902 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:03:59,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-05-03 16:03:59,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 274. [2021-05-03 16:03:59,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.128205128205128) internal successors, (854), 273 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:03:59,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 854 transitions. [2021-05-03 16:03:59,918 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 854 transitions. Word has length 18 [2021-05-03 16:03:59,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:03:59,919 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 854 transitions. [2021-05-03 16:03:59,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) 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) [2021-05-03 16:03:59,919 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 854 transitions. [2021-05-03 16:03:59,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 16:03:59,920 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:03:59,920 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:03:59,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-03 16:03:59,921 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:03:59,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:03:59,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1827512345, now seen corresponding path program 1 times [2021-05-03 16:03:59,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:03:59,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182015946] [2021-05-03 16:03:59,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:03:59,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:03:59,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:03:59,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182015946] [2021-05-03 16:03:59,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:03:59,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 16:03:59,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848174827] [2021-05-03 16:03:59,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 16:03:59,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:03:59,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 16:03:59,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 16:03:59,955 INFO L87 Difference]: Start difference. First operand 274 states and 854 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:00,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:00,013 INFO L93 Difference]: Finished difference Result 345 states and 1038 transitions. [2021-05-03 16:04:00,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 16:04:00,014 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 16:04:00,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:00,017 INFO L225 Difference]: With dead ends: 345 [2021-05-03 16:04:00,017 INFO L226 Difference]: Without dead ends: 307 [2021-05-03 16:04:00,018 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:04:00,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-05-03 16:04:00,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 276. [2021-05-03 16:04:00,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.036363636363636) internal successors, (835), 275 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:00,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 835 transitions. [2021-05-03 16:04:00,030 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 835 transitions. Word has length 19 [2021-05-03 16:04:00,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:00,031 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 835 transitions. [2021-05-03 16:04:00,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:00,031 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 835 transitions. [2021-05-03 16:04:00,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 16:04:00,032 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:00,033 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:00,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-03 16:04:00,033 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:00,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:00,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1166540627, now seen corresponding path program 2 times [2021-05-03 16:04:00,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:00,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846917445] [2021-05-03 16:04:00,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:00,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:00,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:00,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846917445] [2021-05-03 16:04:00,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:04:00,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-03 16:04:00,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351851275] [2021-05-03 16:04:00,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 16:04:00,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:00,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 16:04:00,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:04:00,066 INFO L87 Difference]: Start difference. First operand 276 states and 835 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:00,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:00,082 INFO L93 Difference]: Finished difference Result 257 states and 747 transitions. [2021-05-03 16:04:00,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 16:04:00,083 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 16:04:00,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:00,097 INFO L225 Difference]: With dead ends: 257 [2021-05-03 16:04:00,098 INFO L226 Difference]: Without dead ends: 241 [2021-05-03 16:04:00,098 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:04:00,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-05-03 16:04:00,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 231. [2021-05-03 16:04:00,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 3.017391304347826) internal successors, (694), 230 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) [2021-05-03 16:04:00,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 694 transitions. [2021-05-03 16:04:00,109 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 694 transitions. Word has length 19 [2021-05-03 16:04:00,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:00,109 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 694 transitions. [2021-05-03 16:04:00,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:00,109 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 694 transitions. [2021-05-03 16:04:00,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 16:04:00,111 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:00,111 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:00,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-03 16:04:00,111 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:00,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:00,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1889778531, now seen corresponding path program 1 times [2021-05-03 16:04:00,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:00,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015072672] [2021-05-03 16:04:00,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:00,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:04:00,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015072672] [2021-05-03 16:04:00,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673908399] [2021-05-03 16:04:00,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:00,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:00,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-03 16:04:00,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:00,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:04:00,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:00,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-05-03 16:04:00,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701857300] [2021-05-03 16:04:00,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 16:04:00,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:00,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 16:04:00,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-03 16:04:00,338 INFO L87 Difference]: Start difference. First operand 231 states and 694 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:00,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:00,400 INFO L93 Difference]: Finished difference Result 295 states and 908 transitions. [2021-05-03 16:04:00,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 16:04:00,401 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 16:04:00,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:00,403 INFO L225 Difference]: With dead ends: 295 [2021-05-03 16:04:00,403 INFO L226 Difference]: Without dead ends: 295 [2021-05-03 16:04:00,404 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 28.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-03 16:04:00,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-05-03 16:04:00,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 203. [2021-05-03 16:04:00,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 3.0247524752475248) internal successors, (611), 202 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:00,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 611 transitions. [2021-05-03 16:04:00,415 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 611 transitions. Word has length 20 [2021-05-03 16:04:00,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:00,415 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 611 transitions. [2021-05-03 16:04:00,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:00,415 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 611 transitions. [2021-05-03 16:04:00,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 16:04:00,416 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:00,417 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:00,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-03 16:04:00,645 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:00,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:00,646 INFO L82 PathProgramCache]: Analyzing trace with hash 795815307, now seen corresponding path program 1 times [2021-05-03 16:04:00,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:00,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571243752] [2021-05-03 16:04:00,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:00,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:00,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:04:00,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571243752] [2021-05-03 16:04:00,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313147070] [2021-05-03 16:04:00,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:00,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:00,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-03 16:04:00,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:00,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:04:00,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:00,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-05-03 16:04:00,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541391855] [2021-05-03 16:04:00,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 16:04:00,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:00,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 16:04:00,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-03 16:04:00,856 INFO L87 Difference]: Start difference. First operand 203 states and 611 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:00,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:00,969 INFO L93 Difference]: Finished difference Result 280 states and 853 transitions. [2021-05-03 16:04:00,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 16:04:00,970 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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 21 [2021-05-03 16:04:00,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:00,972 INFO L225 Difference]: With dead ends: 280 [2021-05-03 16:04:00,975 INFO L226 Difference]: Without dead ends: 280 [2021-05-03 16:04:00,976 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-03 16:04:00,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-05-03 16:04:00,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 215. [2021-05-03 16:04:00,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.0233644859813085) internal successors, (647), 214 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:00,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 647 transitions. [2021-05-03 16:04:00,988 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 647 transitions. Word has length 21 [2021-05-03 16:04:00,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:00,988 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 647 transitions. [2021-05-03 16:04:00,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:00,989 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 647 transitions. [2021-05-03 16:04:00,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 16:04:00,990 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:00,990 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:01,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:01,205 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:01,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:01,206 INFO L82 PathProgramCache]: Analyzing trace with hash -944430851, now seen corresponding path program 1 times [2021-05-03 16:04:01,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:01,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069875572] [2021-05-03 16:04:01,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:01,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069875572] [2021-05-03 16:04:01,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795298944] [2021-05-03 16:04:01,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:01,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:01,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 16:04:01,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:01,620 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 18 treesize of output 14 [2021-05-03 16:04:01,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:01,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:01,641 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 12 [2021-05-03 16:04:01,644 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:01,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:01,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 16:04:01,662 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:01,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:01,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:01,672 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:29, output treesize:14 [2021-05-03 16:04:01,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 16:04:01,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:01,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:01,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:01,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-05-03 16:04:01,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:01,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:01,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-03 16:04:01,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937147878] [2021-05-03 16:04:01,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 16:04:01,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:01,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 16:04:01,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 16:04:01,759 INFO L87 Difference]: Start difference. First operand 215 states and 647 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:01,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:01,891 INFO L93 Difference]: Finished difference Result 476 states and 1460 transitions. [2021-05-03 16:04:01,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 16:04:01,892 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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 23 [2021-05-03 16:04:01,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:01,896 INFO L225 Difference]: With dead ends: 476 [2021-05-03 16:04:01,896 INFO L226 Difference]: Without dead ends: 449 [2021-05-03 16:04:01,898 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 16:04:01,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-05-03 16:04:01,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 314. [2021-05-03 16:04:01,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.073482428115016) internal successors, (962), 313 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:01,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 962 transitions. [2021-05-03 16:04:01,920 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 962 transitions. Word has length 23 [2021-05-03 16:04:01,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:01,924 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 962 transitions. [2021-05-03 16:04:01,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:01,924 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 962 transitions. [2021-05-03 16:04:01,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 16:04:01,926 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:01,926 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:02,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:02,142 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:02,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:02,142 INFO L82 PathProgramCache]: Analyzing trace with hash 444763657, now seen corresponding path program 2 times [2021-05-03 16:04:02,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:02,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671679220] [2021-05-03 16:04:02,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:02,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671679220] [2021-05-03 16:04:02,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716056535] [2021-05-03 16:04:02,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:02,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:04:02,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:04:02,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:04:02,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:02,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:04:02,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:02,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:02,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:02,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-05-03 16:04:02,483 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 19 treesize of output 15 [2021-05-03 16:04:02,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:02,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:02,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:02,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-05-03 16:04:02,548 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 24 treesize of output 18 [2021-05-03 16:04:02,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:02,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:02,562 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 20 treesize of output 14 [2021-05-03 16:04:02,576 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:02,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:02,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:02,587 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:11 [2021-05-03 16:04:02,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:02,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:02,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-03 16:04:02,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772766480] [2021-05-03 16:04:02,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 16:04:02,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:02,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 16:04:02,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-03 16:04:02,643 INFO L87 Difference]: Start difference. First operand 314 states and 962 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:02,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:02,738 INFO L93 Difference]: Finished difference Result 517 states and 1600 transitions. [2021-05-03 16:04:02,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 16:04:02,739 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 16:04:02,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:02,743 INFO L225 Difference]: With dead ends: 517 [2021-05-03 16:04:02,744 INFO L226 Difference]: Without dead ends: 490 [2021-05-03 16:04:02,744 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-03 16:04:02,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-05-03 16:04:02,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 366. [2021-05-03 16:04:02,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.084931506849315) internal successors, (1126), 365 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:02,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1126 transitions. [2021-05-03 16:04:02,761 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1126 transitions. Word has length 23 [2021-05-03 16:04:02,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:02,761 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 1126 transitions. [2021-05-03 16:04:02,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:02,762 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1126 transitions. [2021-05-03 16:04:02,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 16:04:02,766 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:02,766 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:02,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:02,981 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:02,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:02,982 INFO L82 PathProgramCache]: Analyzing trace with hash -674031635, now seen corresponding path program 3 times [2021-05-03 16:04:02,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:02,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923683359] [2021-05-03 16:04:02,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:02,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:03,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:03,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923683359] [2021-05-03 16:04:03,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363189799] [2021-05-03 16:04:03,095 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:03,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:04:03,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:04:03,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 16:04:03,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:03,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:04:03,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:03,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:03,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:03,213 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-05-03 16:04:03,292 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 19 treesize of output 15 [2021-05-03 16:04:03,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:03,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:03,311 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 20 treesize of output 16 [2021-05-03 16:04:03,313 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:03,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:03,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:03,322 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:32, output treesize:18 [2021-05-03 16:04:03,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 16:04:03,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:03,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:03,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:03,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-05-03 16:04:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:03,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:03,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-03 16:04:03,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467866797] [2021-05-03 16:04:03,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 16:04:03,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:03,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 16:04:03,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-03 16:04:03,427 INFO L87 Difference]: Start difference. First operand 366 states and 1126 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:03,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:03,549 INFO L93 Difference]: Finished difference Result 572 states and 1775 transitions. [2021-05-03 16:04:03,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 16:04:03,550 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 16:04:03,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:03,554 INFO L225 Difference]: With dead ends: 572 [2021-05-03 16:04:03,555 INFO L226 Difference]: Without dead ends: 545 [2021-05-03 16:04:03,555 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-03 16:04:03,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-05-03 16:04:03,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 366. [2021-05-03 16:04:03,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.084931506849315) internal successors, (1126), 365 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:03,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1126 transitions. [2021-05-03 16:04:03,575 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1126 transitions. Word has length 23 [2021-05-03 16:04:03,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:03,575 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 1126 transitions. [2021-05-03 16:04:03,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:03,576 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1126 transitions. [2021-05-03 16:04:03,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 16:04:03,577 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:03,578 INFO L551 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] [2021-05-03 16:04:03,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-03 16:04:03,793 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:03,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:03,794 INFO L82 PathProgramCache]: Analyzing trace with hash -2112397989, now seen corresponding path program 4 times [2021-05-03 16:04:03,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:03,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720719864] [2021-05-03 16:04:03,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:03,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:03,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:04:03,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720719864] [2021-05-03 16:04:03,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351095545] [2021-05-03 16:04:03,844 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:03,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:04:03,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:04:03,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 16:04:03,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:03,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:03,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:03,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-05-03 16:04:03,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481374967] [2021-05-03 16:04:03,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 16:04:03,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:03,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 16:04:03,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-03 16:04:03,976 INFO L87 Difference]: Start difference. First operand 366 states and 1126 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:04,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:04,735 INFO L93 Difference]: Finished difference Result 1541 states and 4596 transitions. [2021-05-03 16:04:04,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 16:04:04,736 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 16:04:04,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:04,747 INFO L225 Difference]: With dead ends: 1541 [2021-05-03 16:04:04,748 INFO L226 Difference]: Without dead ends: 1541 [2021-05-03 16:04:04,749 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 343.4ms TimeCoverageRelationStatistics Valid=286, Invalid=974, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 16:04:04,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2021-05-03 16:04:04,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 639. [2021-05-03 16:04:04,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.2962382445141065) internal successors, (2103), 638 states have internal predecessors, (2103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:04,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2103 transitions. [2021-05-03 16:04:04,790 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2103 transitions. Word has length 25 [2021-05-03 16:04:04,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:04,791 INFO L480 AbstractCegarLoop]: Abstraction has 639 states and 2103 transitions. [2021-05-03 16:04:04,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:04,791 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2103 transitions. [2021-05-03 16:04:04,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 16:04:04,794 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:04,795 INFO L551 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] [2021-05-03 16:04:05,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:05,009 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:05,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:05,010 INFO L82 PathProgramCache]: Analyzing trace with hash -307591603, now seen corresponding path program 5 times [2021-05-03 16:04:05,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:05,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818241967] [2021-05-03 16:04:05,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:05,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:05,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:05,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818241967] [2021-05-03 16:04:05,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541991444] [2021-05-03 16:04:05,062 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:05,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:04:05,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:04:05,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 16:04:05,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:05,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:04:05,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:05,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-03 16:04:05,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722628001] [2021-05-03 16:04:05,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:04:05,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:05,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:04:05,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:04:05,220 INFO L87 Difference]: Start difference. First operand 639 states and 2103 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 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) [2021-05-03 16:04:06,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:06,161 INFO L93 Difference]: Finished difference Result 1522 states and 4653 transitions. [2021-05-03 16:04:06,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 16:04:06,162 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 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 25 [2021-05-03 16:04:06,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:06,171 INFO L225 Difference]: With dead ends: 1522 [2021-05-03 16:04:06,172 INFO L226 Difference]: Without dead ends: 1522 [2021-05-03 16:04:06,173 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 519.3ms TimeCoverageRelationStatistics Valid=389, Invalid=1333, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 16:04:06,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2021-05-03 16:04:06,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 877. [2021-05-03 16:04:06,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 3.256849315068493) internal successors, (2853), 876 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:06,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 2853 transitions. [2021-05-03 16:04:06,218 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 2853 transitions. Word has length 25 [2021-05-03 16:04:06,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:06,218 INFO L480 AbstractCegarLoop]: Abstraction has 877 states and 2853 transitions. [2021-05-03 16:04:06,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 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) [2021-05-03 16:04:06,219 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 2853 transitions. [2021-05-03 16:04:06,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 16:04:06,223 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:06,223 INFO L551 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] [2021-05-03 16:04:06,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:06,449 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:06,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:06,450 INFO L82 PathProgramCache]: Analyzing trace with hash -2047516449, now seen corresponding path program 6 times [2021-05-03 16:04:06,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:06,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576359785] [2021-05-03 16:04:06,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:06,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:06,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576359785] [2021-05-03 16:04:06,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199535821] [2021-05-03 16:04:06,491 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:06,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:04:06,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:04:06,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 16:04:06,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:06,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:04:06,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:06,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-05-03 16:04:06,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162483691] [2021-05-03 16:04:06,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 16:04:06,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:06,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 16:04:06,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-03 16:04:06,631 INFO L87 Difference]: Start difference. First operand 877 states and 2853 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:07,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:07,239 INFO L93 Difference]: Finished difference Result 2682 states and 8563 transitions. [2021-05-03 16:04:07,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 16:04:07,240 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 16:04:07,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:07,259 INFO L225 Difference]: With dead ends: 2682 [2021-05-03 16:04:07,259 INFO L226 Difference]: Without dead ends: 2656 [2021-05-03 16:04:07,260 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 298.6ms TimeCoverageRelationStatistics Valid=251, Invalid=741, Unknown=0, NotChecked=0, Total=992 [2021-05-03 16:04:07,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2021-05-03 16:04:07,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 1223. [2021-05-03 16:04:07,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1223 states, 1222 states have (on average 3.4459901800327333) internal successors, (4211), 1222 states have internal predecessors, (4211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:07,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1223 states to 1223 states and 4211 transitions. [2021-05-03 16:04:07,340 INFO L78 Accepts]: Start accepts. Automaton has 1223 states and 4211 transitions. Word has length 25 [2021-05-03 16:04:07,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:07,340 INFO L480 AbstractCegarLoop]: Abstraction has 1223 states and 4211 transitions. [2021-05-03 16:04:07,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:07,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1223 states and 4211 transitions. [2021-05-03 16:04:07,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 16:04:07,346 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:07,346 INFO L551 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] [2021-05-03 16:04:07,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-03 16:04:07,561 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:07,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:07,562 INFO L82 PathProgramCache]: Analyzing trace with hash 156506377, now seen corresponding path program 7 times [2021-05-03 16:04:07,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:07,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766315694] [2021-05-03 16:04:07,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:07,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:07,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:07,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766315694] [2021-05-03 16:04:07,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225183503] [2021-05-03 16:04:07,628 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:07,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:07,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 16:04:07,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:07,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:07,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:07,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-05-03 16:04:07,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549570269] [2021-05-03 16:04:07,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 16:04:07,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:07,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 16:04:07,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 16:04:07,729 INFO L87 Difference]: Start difference. First operand 1223 states and 4211 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:07,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:07,828 INFO L93 Difference]: Finished difference Result 1760 states and 5792 transitions. [2021-05-03 16:04:07,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 16:04:07,829 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 25 [2021-05-03 16:04:07,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:07,842 INFO L225 Difference]: With dead ends: 1760 [2021-05-03 16:04:07,842 INFO L226 Difference]: Without dead ends: 1754 [2021-05-03 16:04:07,843 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-03 16:04:07,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1754 states. [2021-05-03 16:04:07,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1754 to 1180. [2021-05-03 16:04:07,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.4079728583545377) internal successors, (4018), 1179 states have internal predecessors, (4018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:07,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 4018 transitions. [2021-05-03 16:04:07,903 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 4018 transitions. Word has length 25 [2021-05-03 16:04:07,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:07,904 INFO L480 AbstractCegarLoop]: Abstraction has 1180 states and 4018 transitions. [2021-05-03 16:04:07,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:07,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 4018 transitions. [2021-05-03 16:04:07,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 16:04:07,909 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:07,910 INFO L551 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] [2021-05-03 16:04:08,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-03 16:04:08,129 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:08,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:08,129 INFO L82 PathProgramCache]: Analyzing trace with hash 2082329639, now seen corresponding path program 8 times [2021-05-03 16:04:08,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:08,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746266907] [2021-05-03 16:04:08,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:08,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:08,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:04:08,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746266907] [2021-05-03 16:04:08,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492274514] [2021-05-03 16:04:08,185 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 [2021-05-03 16:04:08,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:04:08,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:04:08,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 16:04:08,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:08,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:08,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:08,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-03 16:04:08,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803165289] [2021-05-03 16:04:08,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 16:04:08,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:08,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 16:04:08,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 16:04:08,303 INFO L87 Difference]: Start difference. First operand 1180 states and 4018 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:08,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:08,646 INFO L93 Difference]: Finished difference Result 3403 states and 11244 transitions. [2021-05-03 16:04:08,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 16:04:08,646 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 16:04:08,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:08,674 INFO L225 Difference]: With dead ends: 3403 [2021-05-03 16:04:08,674 INFO L226 Difference]: Without dead ends: 3381 [2021-05-03 16:04:08,675 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 136.6ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-05-03 16:04:08,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3381 states. [2021-05-03 16:04:08,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3381 to 1430. [2021-05-03 16:04:08,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1430 states, 1429 states have (on average 3.5269419174247725) internal successors, (5040), 1429 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:08,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1430 states to 1430 states and 5040 transitions. [2021-05-03 16:04:08,772 INFO L78 Accepts]: Start accepts. Automaton has 1430 states and 5040 transitions. Word has length 25 [2021-05-03 16:04:08,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:08,772 INFO L480 AbstractCegarLoop]: Abstraction has 1430 states and 5040 transitions. [2021-05-03 16:04:08,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:08,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1430 states and 5040 transitions. [2021-05-03 16:04:08,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 16:04:08,779 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:08,779 INFO L551 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] [2021-05-03 16:04:09,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-03 16:04:09,005 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:09,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:09,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1027156865, now seen corresponding path program 9 times [2021-05-03 16:04:09,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:09,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301997693] [2021-05-03 16:04:09,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:09,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:09,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:09,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301997693] [2021-05-03 16:04:09,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618332382] [2021-05-03 16:04:09,056 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 [2021-05-03 16:04:09,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:04:09,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:04:09,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 16:04:09,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:09,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:04:09,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:09,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-05-03 16:04:09,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239865547] [2021-05-03 16:04:09,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 16:04:09,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:09,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 16:04:09,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:04:09,183 INFO L87 Difference]: Start difference. First operand 1430 states and 5040 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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) [2021-05-03 16:04:09,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:09,806 INFO L93 Difference]: Finished difference Result 4790 states and 15883 transitions. [2021-05-03 16:04:09,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 16:04:09,807 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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 25 [2021-05-03 16:04:09,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:09,836 INFO L225 Difference]: With dead ends: 4790 [2021-05-03 16:04:09,836 INFO L226 Difference]: Without dead ends: 4746 [2021-05-03 16:04:09,837 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 309.4ms TimeCoverageRelationStatistics Valid=312, Invalid=1020, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 16:04:09,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4746 states. [2021-05-03 16:04:09,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4746 to 2146. [2021-05-03 16:04:09,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2146 states, 2145 states have (on average 3.7104895104895106) internal successors, (7959), 2145 states have internal predecessors, (7959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:09,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2146 states to 2146 states and 7959 transitions. [2021-05-03 16:04:09,990 INFO L78 Accepts]: Start accepts. Automaton has 2146 states and 7959 transitions. Word has length 25 [2021-05-03 16:04:09,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:09,990 INFO L480 AbstractCegarLoop]: Abstraction has 2146 states and 7959 transitions. [2021-05-03 16:04:09,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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) [2021-05-03 16:04:09,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2146 states and 7959 transitions. [2021-05-03 16:04:10,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:04:10,002 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:10,002 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:10,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-03 16:04:10,217 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:10,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:10,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1344251693, now seen corresponding path program 10 times [2021-05-03 16:04:10,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:10,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89058606] [2021-05-03 16:04:10,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:10,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:04:10,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89058606] [2021-05-03 16:04:10,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896068128] [2021-05-03 16:04:10,263 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 [2021-05-03 16:04:10,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:04:10,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:04:10,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 16:04:10,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:10,363 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:04:10,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:10,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-03 16:04:10,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886916213] [2021-05-03 16:04:10,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 16:04:10,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:10,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 16:04:10,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-03 16:04:10,364 INFO L87 Difference]: Start difference. First operand 2146 states and 7959 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:10,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:10,513 INFO L93 Difference]: Finished difference Result 3884 states and 14007 transitions. [2021-05-03 16:04:10,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 16:04:10,514 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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 26 [2021-05-03 16:04:10,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:10,536 INFO L225 Difference]: With dead ends: 3884 [2021-05-03 16:04:10,537 INFO L226 Difference]: Without dead ends: 3500 [2021-05-03 16:04:10,537 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-03 16:04:10,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3500 states. [2021-05-03 16:04:10,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3500 to 3025. [2021-05-03 16:04:10,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3025 states, 3024 states have (on average 3.7354497354497354) internal successors, (11296), 3024 states have internal predecessors, (11296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:10,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3025 states to 3025 states and 11296 transitions. [2021-05-03 16:04:10,700 INFO L78 Accepts]: Start accepts. Automaton has 3025 states and 11296 transitions. Word has length 26 [2021-05-03 16:04:10,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:10,700 INFO L480 AbstractCegarLoop]: Abstraction has 3025 states and 11296 transitions. [2021-05-03 16:04:10,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:10,701 INFO L276 IsEmpty]: Start isEmpty. Operand 3025 states and 11296 transitions. [2021-05-03 16:04:10,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:04:10,717 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:10,717 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:10,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-03 16:04:10,933 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:10,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:10,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1428029849, now seen corresponding path program 11 times [2021-05-03 16:04:10,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:10,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634596233] [2021-05-03 16:04:10,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:10,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:10,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634596233] [2021-05-03 16:04:10,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782339970] [2021-05-03 16:04:10,976 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 [2021-05-03 16:04:11,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:04:11,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:04:11,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 16:04:11,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:11,053 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:11,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:11,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-03 16:04:11,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405401920] [2021-05-03 16:04:11,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 16:04:11,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:11,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 16:04:11,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-03 16:04:11,055 INFO L87 Difference]: Start difference. First operand 3025 states and 11296 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:11,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:11,286 INFO L93 Difference]: Finished difference Result 6472 states and 23938 transitions. [2021-05-03 16:04:11,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 16:04:11,287 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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 26 [2021-05-03 16:04:11,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:11,330 INFO L225 Difference]: With dead ends: 6472 [2021-05-03 16:04:11,330 INFO L226 Difference]: Without dead ends: 6337 [2021-05-03 16:04:11,330 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-03 16:04:11,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6337 states. [2021-05-03 16:04:11,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6337 to 5444. [2021-05-03 16:04:11,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5444 states, 5443 states have (on average 3.834466286974095) internal successors, (20871), 5443 states have internal predecessors, (20871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:11,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5444 states to 5444 states and 20871 transitions. [2021-05-03 16:04:11,592 INFO L78 Accepts]: Start accepts. Automaton has 5444 states and 20871 transitions. Word has length 26 [2021-05-03 16:04:11,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:11,592 INFO L480 AbstractCegarLoop]: Abstraction has 5444 states and 20871 transitions. [2021-05-03 16:04:11,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:11,592 INFO L276 IsEmpty]: Start isEmpty. Operand 5444 states and 20871 transitions. [2021-05-03 16:04:11,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:04:11,620 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:11,620 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:11,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:11,845 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:11,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:11,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1734973483, now seen corresponding path program 12 times [2021-05-03 16:04:11,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:11,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042944450] [2021-05-03 16:04:11,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:11,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:11,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:04:11,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042944450] [2021-05-03 16:04:11,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449534140] [2021-05-03 16:04:11,900 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 [2021-05-03 16:04:11,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:04:11,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:04:11,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 16:04:11,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:12,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:12,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:12,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-05-03 16:04:12,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762279101] [2021-05-03 16:04:12,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 16:04:12,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:12,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 16:04:12,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:04:12,027 INFO L87 Difference]: Start difference. First operand 5444 states and 20871 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 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) [2021-05-03 16:04:12,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:12,635 INFO L93 Difference]: Finished difference Result 7489 states and 26215 transitions. [2021-05-03 16:04:12,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 16:04:12,636 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 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 [2021-05-03 16:04:12,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:12,682 INFO L225 Difference]: With dead ends: 7489 [2021-05-03 16:04:12,683 INFO L226 Difference]: Without dead ends: 7451 [2021-05-03 16:04:12,683 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 353.3ms TimeCoverageRelationStatistics Valid=372, Invalid=1110, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 16:04:12,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7451 states. [2021-05-03 16:04:12,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7451 to 4848. [2021-05-03 16:04:12,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4848 states, 4847 states have (on average 3.770786053228801) internal successors, (18277), 4847 states have internal predecessors, (18277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:13,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4848 states to 4848 states and 18277 transitions. [2021-05-03 16:04:13,019 INFO L78 Accepts]: Start accepts. Automaton has 4848 states and 18277 transitions. Word has length 26 [2021-05-03 16:04:13,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:13,019 INFO L480 AbstractCegarLoop]: Abstraction has 4848 states and 18277 transitions. [2021-05-03 16:04:13,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 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) [2021-05-03 16:04:13,020 INFO L276 IsEmpty]: Start isEmpty. Operand 4848 states and 18277 transitions. [2021-05-03 16:04:13,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:04:13,035 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:13,036 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:13,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:13,241 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:13,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:13,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1999834593, now seen corresponding path program 13 times [2021-05-03 16:04:13,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:13,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840574338] [2021-05-03 16:04:13,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:13,278 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:04:13,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840574338] [2021-05-03 16:04:13,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701683769] [2021-05-03 16:04:13,279 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 [2021-05-03 16:04:13,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:13,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 16:04:13,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:13,382 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:04:13,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:13,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-05-03 16:04:13,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329313107] [2021-05-03 16:04:13,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 16:04:13,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:13,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 16:04:13,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-03 16:04:13,384 INFO L87 Difference]: Start difference. First operand 4848 states and 18277 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:13,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:13,541 INFO L93 Difference]: Finished difference Result 7090 states and 25995 transitions. [2021-05-03 16:04:13,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 16:04:13,542 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:04:13,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:13,580 INFO L225 Difference]: With dead ends: 7090 [2021-05-03 16:04:13,580 INFO L226 Difference]: Without dead ends: 6826 [2021-05-03 16:04:13,580 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-03 16:04:13,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6826 states. [2021-05-03 16:04:13,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6826 to 6194. [2021-05-03 16:04:13,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6194 states, 6193 states have (on average 3.650411755207492) internal successors, (22607), 6193 states have internal predecessors, (22607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:13,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6194 states to 6194 states and 22607 transitions. [2021-05-03 16:04:13,815 INFO L78 Accepts]: Start accepts. Automaton has 6194 states and 22607 transitions. Word has length 28 [2021-05-03 16:04:13,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:13,816 INFO L480 AbstractCegarLoop]: Abstraction has 6194 states and 22607 transitions. [2021-05-03 16:04:13,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:13,816 INFO L276 IsEmpty]: Start isEmpty. Operand 6194 states and 22607 transitions. [2021-05-03 16:04:13,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:04:13,837 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:13,837 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:14,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-03 16:04:14,065 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:14,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:14,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1894101357, now seen corresponding path program 14 times [2021-05-03 16:04:14,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:14,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788834232] [2021-05-03 16:04:14,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:14,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:14,102 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:04:14,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788834232] [2021-05-03 16:04:14,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040877886] [2021-05-03 16:04:14,103 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 [2021-05-03 16:04:14,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:04:14,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:04:14,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 16:04:14,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:14,217 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:04:14,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:14,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-05-03 16:04:14,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776741784] [2021-05-03 16:04:14,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 16:04:14,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:14,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 16:04:14,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:04:14,219 INFO L87 Difference]: Start difference. First operand 6194 states and 22607 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:14,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:14,788 INFO L93 Difference]: Finished difference Result 10892 states and 38505 transitions. [2021-05-03 16:04:14,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 16:04:14,790 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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 [2021-05-03 16:04:14,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:14,848 INFO L225 Difference]: With dead ends: 10892 [2021-05-03 16:04:14,849 INFO L226 Difference]: Without dead ends: 10752 [2021-05-03 16:04:14,849 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 211.4ms TimeCoverageRelationStatistics Valid=179, Invalid=471, Unknown=0, NotChecked=0, Total=650 [2021-05-03 16:04:14,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10752 states. [2021-05-03 16:04:15,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10752 to 9497. [2021-05-03 16:04:15,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9497 states, 9496 states have (on average 3.6148904802021904) internal successors, (34327), 9496 states have internal predecessors, (34327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:15,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9497 states to 9497 states and 34327 transitions. [2021-05-03 16:04:15,232 INFO L78 Accepts]: Start accepts. Automaton has 9497 states and 34327 transitions. Word has length 28 [2021-05-03 16:04:15,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:15,233 INFO L480 AbstractCegarLoop]: Abstraction has 9497 states and 34327 transitions. [2021-05-03 16:04:15,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:15,234 INFO L276 IsEmpty]: Start isEmpty. Operand 9497 states and 34327 transitions. [2021-05-03 16:04:15,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:04:15,267 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:15,267 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:15,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:15,493 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:15,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:15,494 INFO L82 PathProgramCache]: Analyzing trace with hash -946031339, now seen corresponding path program 15 times [2021-05-03 16:04:15,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:15,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885521652] [2021-05-03 16:04:15,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:15,937 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:15,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885521652] [2021-05-03 16:04:15,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444809027] [2021-05-03 16:04:15,938 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 [2021-05-03 16:04:15,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:04:15,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:04:15,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 16:04:15,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:16,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:04:16,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:16,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:16,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:16,193 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:47 [2021-05-03 16:04:16,338 INFO L446 ElimStorePlain]: Different costs {1=[v_C_14], 2=[A, B]} [2021-05-03 16:04:16,354 INFO L354 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2021-05-03 16:04:16,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2021-05-03 16:04:16,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:16,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:16,479 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-05-03 16:04:16,479 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-05-03 16:04:16,481 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 16:04:16,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:16,506 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:16,507 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 29 treesize of output 37 [2021-05-03 16:04:16,639 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-05-03 16:04:16,671 INFO L628 ElimStorePlain]: treesize reduction 22, result has 58.5 percent of original size [2021-05-03 16:04:16,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:04:16,692 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:58, output treesize:31 [2021-05-03 16:04:17,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:17,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:04:17,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 24 treesize of output 16 [2021-05-03 16:04:17,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:17,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:17,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:17,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:5 [2021-05-03 16:04:17,094 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:17,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:17,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-05-03 16:04:17,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496304231] [2021-05-03 16:04:17,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 16:04:17,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:17,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 16:04:17,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-05-03 16:04:17,096 INFO L87 Difference]: Start difference. First operand 9497 states and 34327 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:17,572 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-05-03 16:04:23,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:23,661 INFO L93 Difference]: Finished difference Result 21627 states and 74484 transitions. [2021-05-03 16:04:23,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-03 16:04:23,662 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:04:23,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:23,756 INFO L225 Difference]: With dead ends: 21627 [2021-05-03 16:04:23,756 INFO L226 Difference]: Without dead ends: 21422 [2021-05-03 16:04:23,757 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1936 ImplicationChecksByTransitivity, 4608.0ms TimeCoverageRelationStatistics Valid=901, Invalid=5419, Unknown=0, NotChecked=0, Total=6320 [2021-05-03 16:04:23,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21422 states. [2021-05-03 16:04:24,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21422 to 10014. [2021-05-03 16:04:24,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10014 states, 10013 states have (on average 3.592329971037651) internal successors, (35970), 10013 states have internal predecessors, (35970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:24,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10014 states to 10014 states and 35970 transitions. [2021-05-03 16:04:24,290 INFO L78 Accepts]: Start accepts. Automaton has 10014 states and 35970 transitions. Word has length 30 [2021-05-03 16:04:24,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:24,290 INFO L480 AbstractCegarLoop]: Abstraction has 10014 states and 35970 transitions. [2021-05-03 16:04:24,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:24,290 INFO L276 IsEmpty]: Start isEmpty. Operand 10014 states and 35970 transitions. [2021-05-03 16:04:24,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:04:24,327 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:24,327 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:24,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-03 16:04:24,541 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:24,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:24,542 INFO L82 PathProgramCache]: Analyzing trace with hash 237194815, now seen corresponding path program 16 times [2021-05-03 16:04:24,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:24,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331757184] [2021-05-03 16:04:24,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:24,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:24,873 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:24,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331757184] [2021-05-03 16:04:24,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212234695] [2021-05-03 16:04:24,873 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 [2021-05-03 16:04:24,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:04:24,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:04:24,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 16:04:24,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:25,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:04:25,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:25,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:25,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:25,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-05-03 16:04:25,118 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 33 treesize of output 25 [2021-05-03 16:04:25,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:25,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:25,132 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 28 treesize of output 20 [2021-05-03 16:04:25,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:25,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:25,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 16 [2021-05-03 16:04:25,145 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:25,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:25,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:25,153 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:48, output treesize:18 [2021-05-03 16:04:25,290 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 [2021-05-03 16:04:25,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:25,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:25,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:25,296 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:5 [2021-05-03 16:04:25,325 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:25,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:25,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-05-03 16:04:25,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212010069] [2021-05-03 16:04:25,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:04:25,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:25,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:04:25,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:04:25,327 INFO L87 Difference]: Start difference. First operand 10014 states and 35970 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:26,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:26,384 INFO L93 Difference]: Finished difference Result 15241 states and 54239 transitions. [2021-05-03 16:04:26,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 16:04:26,385 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:04:26,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:26,471 INFO L225 Difference]: With dead ends: 15241 [2021-05-03 16:04:26,472 INFO L226 Difference]: Without dead ends: 15214 [2021-05-03 16:04:26,472 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 719.2ms TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:04:26,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15214 states. [2021-05-03 16:04:26,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15214 to 10167. [2021-05-03 16:04:26,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10167 states, 10166 states have (on average 3.58715325595121) internal successors, (36467), 10166 states have internal predecessors, (36467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:26,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10167 states to 10167 states and 36467 transitions. [2021-05-03 16:04:26,884 INFO L78 Accepts]: Start accepts. Automaton has 10167 states and 36467 transitions. Word has length 30 [2021-05-03 16:04:26,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:26,884 INFO L480 AbstractCegarLoop]: Abstraction has 10167 states and 36467 transitions. [2021-05-03 16:04:26,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:26,885 INFO L276 IsEmpty]: Start isEmpty. Operand 10167 states and 36467 transitions. [2021-05-03 16:04:26,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:04:26,922 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:26,923 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:27,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-03 16:04:27,146 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:27,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:27,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1212152839, now seen corresponding path program 17 times [2021-05-03 16:04:27,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:27,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766867325] [2021-05-03 16:04:27,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:27,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:27,412 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:27,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766867325] [2021-05-03 16:04:27,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353249929] [2021-05-03 16:04:27,413 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 [2021-05-03 16:04:27,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:04:27,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:04:27,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 16:04:27,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:27,706 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-05-03 16:04:27,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-05-03 16:04:27,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:27,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:27,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:27,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:58 [2021-05-03 16:04:27,935 INFO L446 ElimStorePlain]: Different costs {3=[v_C_18], 6=[A, B]} [2021-05-03 16:04:27,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:27,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:27,946 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-05-03 16:04:27,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 98 [2021-05-03 16:04:27,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:27,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:27,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:27,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:27,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:28,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:28,002 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 62 treesize of output 86 [2021-05-03 16:04:28,010 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 16:04:28,067 INFO L628 ElimStorePlain]: treesize reduction 78, result has 58.9 percent of original size [2021-05-03 16:04:28,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:28,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:28,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:28,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:28,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 97 [2021-05-03 16:04:28,116 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-05-03 16:04:28,155 INFO L628 ElimStorePlain]: treesize reduction 54, result has 58.5 percent of original size [2021-05-03 16:04:28,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:04:28,167 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:135, output treesize:76 [2021-05-03 16:04:28,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:28,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:28,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:28,401 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:28,401 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 [2021-05-03 16:04:28,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 16:04:28,449 INFO L628 ElimStorePlain]: treesize reduction 11, result has 74.4 percent of original size [2021-05-03 16:04:28,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:28,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:24 [2021-05-03 16:04:28,571 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:28,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:28,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-05-03 16:04:28,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841392641] [2021-05-03 16:04:28,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 16:04:28,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:28,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 16:04:28,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:04:28,574 INFO L87 Difference]: Start difference. First operand 10167 states and 36467 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:30,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:30,126 INFO L93 Difference]: Finished difference Result 15032 states and 53519 transitions. [2021-05-03 16:04:30,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 16:04:30,127 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:04:30,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:30,191 INFO L225 Difference]: With dead ends: 15032 [2021-05-03 16:04:30,191 INFO L226 Difference]: Without dead ends: 14961 [2021-05-03 16:04:30,192 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1087.2ms TimeCoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2021-05-03 16:04:30,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14961 states. [2021-05-03 16:04:30,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14961 to 10149. [2021-05-03 16:04:30,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10149 states, 10148 states have (on average 3.588194718171068) internal successors, (36413), 10148 states have internal predecessors, (36413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:30,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10149 states to 10149 states and 36413 transitions. [2021-05-03 16:04:30,620 INFO L78 Accepts]: Start accepts. Automaton has 10149 states and 36413 transitions. Word has length 30 [2021-05-03 16:04:30,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:30,620 INFO L480 AbstractCegarLoop]: Abstraction has 10149 states and 36413 transitions. [2021-05-03 16:04:30,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:30,620 INFO L276 IsEmpty]: Start isEmpty. Operand 10149 states and 36413 transitions. [2021-05-03 16:04:30,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:04:30,660 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:30,661 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:30,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-03 16:04:30,889 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:30,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:30,890 INFO L82 PathProgramCache]: Analyzing trace with hash 86318325, now seen corresponding path program 18 times [2021-05-03 16:04:30,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:30,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939356442] [2021-05-03 16:04:30,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:30,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:31,271 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:31,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939356442] [2021-05-03 16:04:31,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972115956] [2021-05-03 16:04:31,271 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:31,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:04:31,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:04:31,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 16:04:31,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:31,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:04:31,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:31,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:31,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:31,387 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-05-03 16:04:31,502 INFO L446 ElimStorePlain]: Different costs {1=[v_C_20], 5=[A, B]} [2021-05-03 16:04:31,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:31,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-05-03 16:04:31,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:31,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:31,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:31,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:04:31,533 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 28 [2021-05-03 16:04:31,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:31,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:31,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:31,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:04:31,550 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 31 treesize of output 21 [2021-05-03 16:04:31,551 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:31,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:31,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:31,559 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:58, output treesize:24 [2021-05-03 16:04:31,595 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 [2021-05-03 16:04:31,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:31,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:31,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:31,599 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:5 [2021-05-03 16:04:31,623 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:31,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:31,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-05-03 16:04:31,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973185775] [2021-05-03 16:04:31,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:04:31,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:31,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:04:31,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:04:31,626 INFO L87 Difference]: Start difference. First operand 10149 states and 36413 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 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) [2021-05-03 16:04:32,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:32,468 INFO L93 Difference]: Finished difference Result 15390 states and 54696 transitions. [2021-05-03 16:04:32,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 16:04:32,469 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 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 30 [2021-05-03 16:04:32,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:32,545 INFO L225 Difference]: With dead ends: 15390 [2021-05-03 16:04:32,545 INFO L226 Difference]: Without dead ends: 15255 [2021-05-03 16:04:32,546 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 702.9ms TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2021-05-03 16:04:32,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15255 states. [2021-05-03 16:04:32,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15255 to 10163. [2021-05-03 16:04:32,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10163 states, 10162 states have (on average 3.5874827789805157) internal successors, (36456), 10162 states have internal predecessors, (36456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:32,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10163 states to 10163 states and 36456 transitions. [2021-05-03 16:04:32,923 INFO L78 Accepts]: Start accepts. Automaton has 10163 states and 36456 transitions. Word has length 30 [2021-05-03 16:04:32,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:32,924 INFO L480 AbstractCegarLoop]: Abstraction has 10163 states and 36456 transitions. [2021-05-03 16:04:32,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 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) [2021-05-03 16:04:32,924 INFO L276 IsEmpty]: Start isEmpty. Operand 10163 states and 36456 transitions. [2021-05-03 16:04:32,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:04:32,953 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:32,953 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:33,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-05-03 16:04:33,154 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:33,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:33,154 INFO L82 PathProgramCache]: Analyzing trace with hash -2058545279, now seen corresponding path program 19 times [2021-05-03 16:04:33,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:33,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161300652] [2021-05-03 16:04:33,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:33,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:33,536 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:33,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161300652] [2021-05-03 16:04:33,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124704848] [2021-05-03 16:04:33,537 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 [2021-05-03 16:04:33,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:33,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 16:04:33,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:33,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-05-03 16:04:33,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:33,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:33,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:33,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-05-03 16:04:33,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-05-03 16:04:33,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:33,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:33,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:33,744 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:52 [2021-05-03 16:04:33,799 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 35 treesize of output 29 [2021-05-03 16:04:33,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:33,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:33,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:33,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:33 [2021-05-03 16:04:33,858 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 25 treesize of output 17 [2021-05-03 16:04:33,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:33,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:33,867 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 24 treesize of output 16 [2021-05-03 16:04:33,869 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:33,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:33,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:33,873 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-05-03 16:04:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:33,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:33,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-05-03 16:04:33,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264760617] [2021-05-03 16:04:33,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:04:33,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:33,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:04:33,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:04:33,900 INFO L87 Difference]: Start difference. First operand 10163 states and 36456 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) [2021-05-03 16:04:34,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:34,904 INFO L93 Difference]: Finished difference Result 15442 states and 54923 transitions. [2021-05-03 16:04:34,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 16:04:34,905 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 30 [2021-05-03 16:04:34,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:34,969 INFO L225 Difference]: With dead ends: 15442 [2021-05-03 16:04:34,969 INFO L226 Difference]: Without dead ends: 15414 [2021-05-03 16:04:34,970 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 760.3ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:04:34,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15414 states. [2021-05-03 16:04:35,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15414 to 10184. [2021-05-03 16:04:35,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10184 states, 10183 states have (on average 3.5871550623588333) internal successors, (36528), 10183 states have internal predecessors, (36528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:35,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10184 states to 10184 states and 36528 transitions. [2021-05-03 16:04:35,329 INFO L78 Accepts]: Start accepts. Automaton has 10184 states and 36528 transitions. Word has length 30 [2021-05-03 16:04:35,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:35,330 INFO L480 AbstractCegarLoop]: Abstraction has 10184 states and 36528 transitions. [2021-05-03 16:04:35,330 INFO L481 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) [2021-05-03 16:04:35,330 INFO L276 IsEmpty]: Start isEmpty. Operand 10184 states and 36528 transitions. [2021-05-03 16:04:35,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:04:35,358 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:35,358 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:35,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:35,559 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:35,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:35,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1117626725, now seen corresponding path program 20 times [2021-05-03 16:04:35,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:35,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703686230] [2021-05-03 16:04:35,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:35,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:35,893 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:35,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703686230] [2021-05-03 16:04:35,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438542258] [2021-05-03 16:04:35,894 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:35,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:04:35,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:04:35,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 16:04:35,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:35,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:04:35,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:36,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:36,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:36,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:40 [2021-05-03 16:04:36,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-05-03 16:04:36,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:36,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:36,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:36,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:46 [2021-05-03 16:04:36,157 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 30 treesize of output 22 [2021-05-03 16:04:36,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:36,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:36,171 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 25 treesize of output 17 [2021-05-03 16:04:36,173 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:36,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:36,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:36,181 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:47, output treesize:18 [2021-05-03 16:04:36,209 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 9 treesize of output 5 [2021-05-03 16:04:36,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:36,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:36,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:36,215 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:5 [2021-05-03 16:04:36,248 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:36,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:36,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-05-03 16:04:36,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737615058] [2021-05-03 16:04:36,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:04:36,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:36,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:04:36,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:04:36,250 INFO L87 Difference]: Start difference. First operand 10184 states and 36528 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) [2021-05-03 16:04:37,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:37,133 INFO L93 Difference]: Finished difference Result 15509 states and 55098 transitions. [2021-05-03 16:04:37,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 16:04:37,137 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 30 [2021-05-03 16:04:37,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:37,277 INFO L225 Difference]: With dead ends: 15509 [2021-05-03 16:04:37,277 INFO L226 Difference]: Without dead ends: 15428 [2021-05-03 16:04:37,278 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 664.4ms TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2021-05-03 16:04:37,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15428 states. [2021-05-03 16:04:37,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15428 to 10176. [2021-05-03 16:04:37,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10176 states, 10175 states have (on average 3.5887960687960687) internal successors, (36516), 10175 states have internal predecessors, (36516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:37,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10176 states to 10176 states and 36516 transitions. [2021-05-03 16:04:37,534 INFO L78 Accepts]: Start accepts. Automaton has 10176 states and 36516 transitions. Word has length 30 [2021-05-03 16:04:37,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:37,535 INFO L480 AbstractCegarLoop]: Abstraction has 10176 states and 36516 transitions. [2021-05-03 16:04:37,535 INFO L481 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) [2021-05-03 16:04:37,535 INFO L276 IsEmpty]: Start isEmpty. Operand 10176 states and 36516 transitions. [2021-05-03 16:04:37,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:04:37,558 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:37,559 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:37,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:37,759 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:37,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:37,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1872555743, now seen corresponding path program 21 times [2021-05-03 16:04:37,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:37,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939027453] [2021-05-03 16:04:37,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:38,051 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:38,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939027453] [2021-05-03 16:04:38,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112397102] [2021-05-03 16:04:38,051 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:38,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:04:38,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:04:38,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 16:04:38,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:38,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:04:38,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:38,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:38,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:38,175 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-05-03 16:04:38,319 INFO L446 ElimStorePlain]: Different costs {1=[v_C_26], 5=[A, B]} [2021-05-03 16:04:38,336 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-05-03 16:04:38,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2021-05-03 16:04:38,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:38,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:38,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:04:38,373 INFO L354 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2021-05-03 16:04:38,373 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 32 [2021-05-03 16:04:38,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 16:04:38,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:38,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:04:38,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:38,404 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 39 [2021-05-03 16:04:38,415 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-05-03 16:04:38,449 INFO L628 ElimStorePlain]: treesize reduction 28, result has 54.1 percent of original size [2021-05-03 16:04:38,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:04:38,457 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:66, output treesize:33 [2021-05-03 16:04:38,726 INFO L446 ElimStorePlain]: Different costs {0=[C], 2=[v_prenex_1]} [2021-05-03 16:04:38,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 16:04:38,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:38,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:38,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:38,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:04:38,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 22 treesize of output 14 [2021-05-03 16:04:38,753 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:38,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:38,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:04:38,766 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:48, output treesize:20 [2021-05-03 16:04:38,832 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:38,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:38,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-05-03 16:04:38,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701613173] [2021-05-03 16:04:38,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:04:38,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:38,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:04:38,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:04:38,834 INFO L87 Difference]: Start difference. First operand 10176 states and 36516 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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) [2021-05-03 16:04:41,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:41,733 INFO L93 Difference]: Finished difference Result 16941 states and 59595 transitions. [2021-05-03 16:04:41,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 16:04:41,734 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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 30 [2021-05-03 16:04:41,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:41,805 INFO L225 Difference]: With dead ends: 16941 [2021-05-03 16:04:41,805 INFO L226 Difference]: Without dead ends: 16770 [2021-05-03 16:04:41,806 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 2133.4ms TimeCoverageRelationStatistics Valid=325, Invalid=1931, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 16:04:41,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16770 states. [2021-05-03 16:04:42,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16770 to 10358. [2021-05-03 16:04:42,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10358 states, 10357 states have (on average 3.588201216568504) internal successors, (37163), 10357 states have internal predecessors, (37163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:42,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10358 states to 10358 states and 37163 transitions. [2021-05-03 16:04:42,147 INFO L78 Accepts]: Start accepts. Automaton has 10358 states and 37163 transitions. Word has length 30 [2021-05-03 16:04:42,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:42,147 INFO L480 AbstractCegarLoop]: Abstraction has 10358 states and 37163 transitions. [2021-05-03 16:04:42,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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) [2021-05-03 16:04:42,147 INFO L276 IsEmpty]: Start isEmpty. Operand 10358 states and 37163 transitions. [2021-05-03 16:04:42,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:04:42,176 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:42,176 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:42,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-05-03 16:04:42,405 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:42,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:42,405 INFO L82 PathProgramCache]: Analyzing trace with hash -702398561, now seen corresponding path program 22 times [2021-05-03 16:04:42,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:42,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728068975] [2021-05-03 16:04:42,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:42,804 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:42,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728068975] [2021-05-03 16:04:42,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215669308] [2021-05-03 16:04:42,804 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:42,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:04:42,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:04:42,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 16:04:42,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:42,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:04:42,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:42,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:42,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:42,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-05-03 16:04:43,011 INFO L446 ElimStorePlain]: Different costs {1=[v_C_28], 5=[A, B]} [2021-05-03 16:04:43,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:43,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:04:43,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:43,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:43,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:43,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:04:43,040 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 28 [2021-05-03 16:04:43,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:43,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:43,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:43,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:04:43,057 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 31 treesize of output 21 [2021-05-03 16:04:43,059 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:43,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:43,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:43,067 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:54, output treesize:20 [2021-05-03 16:04:43,142 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 [2021-05-03 16:04:43,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:43,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:43,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:43,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:5 [2021-05-03 16:04:43,172 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:43,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:43,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-05-03 16:04:43,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440973388] [2021-05-03 16:04:43,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 16:04:43,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:43,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 16:04:43,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:04:43,174 INFO L87 Difference]: Start difference. First operand 10358 states and 37163 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2021-05-03 16:04:44,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:44,330 INFO L93 Difference]: Finished difference Result 15587 states and 55443 transitions. [2021-05-03 16:04:44,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:04:44,331 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 30 [2021-05-03 16:04:44,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:44,386 INFO L225 Difference]: With dead ends: 15587 [2021-05-03 16:04:44,386 INFO L226 Difference]: Without dead ends: 15556 [2021-05-03 16:04:44,387 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1019.9ms TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:04:44,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15556 states. [2021-05-03 16:04:44,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15556 to 10418. [2021-05-03 16:04:44,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10418 states, 10417 states have (on average 3.5867332245368146) internal successors, (37363), 10417 states have internal predecessors, (37363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:44,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10418 states to 10418 states and 37363 transitions. [2021-05-03 16:04:44,768 INFO L78 Accepts]: Start accepts. Automaton has 10418 states and 37363 transitions. Word has length 30 [2021-05-03 16:04:44,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:44,768 INFO L480 AbstractCegarLoop]: Abstraction has 10418 states and 37363 transitions. [2021-05-03 16:04:44,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2021-05-03 16:04:44,768 INFO L276 IsEmpty]: Start isEmpty. Operand 10418 states and 37363 transitions. [2021-05-03 16:04:44,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:04:44,798 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:44,798 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:44,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:44,999 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:45,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:45,000 INFO L82 PathProgramCache]: Analyzing trace with hash 867632129, now seen corresponding path program 23 times [2021-05-03 16:04:45,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:45,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911431257] [2021-05-03 16:04:45,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:45,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:45,432 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:45,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911431257] [2021-05-03 16:04:45,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239365857] [2021-05-03 16:04:45,433 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:45,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 16:04:45,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:04:45,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 16:04:45,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:45,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:04:45,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:45,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:45,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:45,545 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-05-03 16:04:45,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:45,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:04:45,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:45,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:45,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:45,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:53 [2021-05-03 16:04:45,769 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 32 treesize of output 24 [2021-05-03 16:04:45,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:45,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:45,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:45,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-05-03 16:04:45,870 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 25 treesize of output 17 [2021-05-03 16:04:45,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:45,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:45,878 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 20 treesize of output 12 [2021-05-03 16:04:45,879 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:45,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:45,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:45,882 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:5 [2021-05-03 16:04:45,907 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:45,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:45,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 16:04:45,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352453151] [2021-05-03 16:04:45,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:04:45,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:45,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:04:45,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:04:45,909 INFO L87 Difference]: Start difference. First operand 10418 states and 37363 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) [2021-05-03 16:04:47,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:47,163 INFO L93 Difference]: Finished difference Result 14226 states and 50216 transitions. [2021-05-03 16:04:47,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 16:04:47,164 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 30 [2021-05-03 16:04:47,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:47,216 INFO L225 Difference]: With dead ends: 14226 [2021-05-03 16:04:47,217 INFO L226 Difference]: Without dead ends: 14187 [2021-05-03 16:04:47,217 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 974.0ms TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:04:47,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14187 states. [2021-05-03 16:04:47,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14187 to 10487. [2021-05-03 16:04:47,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10487 states, 10486 states have (on average 3.584875071523937) internal successors, (37591), 10486 states have internal predecessors, (37591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:47,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10487 states to 10487 states and 37591 transitions. [2021-05-03 16:04:47,503 INFO L78 Accepts]: Start accepts. Automaton has 10487 states and 37591 transitions. Word has length 30 [2021-05-03 16:04:47,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:47,504 INFO L480 AbstractCegarLoop]: Abstraction has 10487 states and 37591 transitions. [2021-05-03 16:04:47,504 INFO L481 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) [2021-05-03 16:04:47,504 INFO L276 IsEmpty]: Start isEmpty. Operand 10487 states and 37591 transitions. [2021-05-03 16:04:47,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:04:47,530 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:47,530 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:47,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-03 16:04:47,757 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:47,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:47,757 INFO L82 PathProgramCache]: Analyzing trace with hash -251163163, now seen corresponding path program 24 times [2021-05-03 16:04:47,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:47,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158233341] [2021-05-03 16:04:47,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:47,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:48,280 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:48,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158233341] [2021-05-03 16:04:48,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189238720] [2021-05-03 16:04:48,280 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:48,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 16:04:48,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:04:48,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 16:04:48,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:48,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-05-03 16:04:48,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:48,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:48,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:48,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:42 [2021-05-03 16:04:48,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:48,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:04:48,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:48,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:48,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:48,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:53 [2021-05-03 16:04:48,631 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 32 treesize of output 24 [2021-05-03 16:04:48,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:48,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:48,652 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 27 treesize of output 19 [2021-05-03 16:04:48,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:48,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:48,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:48,667 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:26 [2021-05-03 16:04:48,709 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 [2021-05-03 16:04:48,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:48,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:48,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:48,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:15 [2021-05-03 16:04:48,817 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:48,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:48,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 16:04:48,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317503176] [2021-05-03 16:04:48,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:04:48,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:48,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:04:48,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:04:48,820 INFO L87 Difference]: Start difference. First operand 10487 states and 37591 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) [2021-05-03 16:04:50,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:50,433 INFO L93 Difference]: Finished difference Result 14055 states and 49645 transitions. [2021-05-03 16:04:50,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 16:04:50,434 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 30 [2021-05-03 16:04:50,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:50,480 INFO L225 Difference]: With dead ends: 14055 [2021-05-03 16:04:50,481 INFO L226 Difference]: Without dead ends: 13945 [2021-05-03 16:04:50,481 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1176.4ms TimeCoverageRelationStatistics Valid=155, Invalid=967, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 16:04:50,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13945 states. [2021-05-03 16:04:50,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13945 to 10520. [2021-05-03 16:04:50,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10520 states, 10519 states have (on average 3.5842760718699496) internal successors, (37703), 10519 states have internal predecessors, (37703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:50,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10520 states to 10520 states and 37703 transitions. [2021-05-03 16:04:50,765 INFO L78 Accepts]: Start accepts. Automaton has 10520 states and 37703 transitions. Word has length 30 [2021-05-03 16:04:50,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:50,765 INFO L480 AbstractCegarLoop]: Abstraction has 10520 states and 37703 transitions. [2021-05-03 16:04:50,765 INFO L481 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) [2021-05-03 16:04:50,765 INFO L276 IsEmpty]: Start isEmpty. Operand 10520 states and 37703 transitions. [2021-05-03 16:04:50,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:04:50,790 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:50,790 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:50,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-05-03 16:04:50,990 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:50,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:50,991 INFO L82 PathProgramCache]: Analyzing trace with hash 2094092255, now seen corresponding path program 25 times [2021-05-03 16:04:50,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:50,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446496345] [2021-05-03 16:04:50,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:50,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:51,387 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:51,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446496345] [2021-05-03 16:04:51,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563130332] [2021-05-03 16:04:51,387 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:51,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:51,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 16:04:51,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:51,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:04:51,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:51,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:51,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:51,489 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:40 [2021-05-03 16:04:51,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:51,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:04:51,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:51,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:51,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:51,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:52 [2021-05-03 16:04:51,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:51,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:04:51,605 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 28 [2021-05-03 16:04:51,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:51,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:51,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:51,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:04:51,618 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 31 treesize of output 21 [2021-05-03 16:04:51,620 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:51,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:51,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:51,629 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:20 [2021-05-03 16:04:51,677 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 32 treesize of output 20 [2021-05-03 16:04:51,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:51,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:51,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:51,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-05-03 16:04:51,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:51,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:51,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2021-05-03 16:04:51,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093424531] [2021-05-03 16:04:51,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:04:51,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:51,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:04:51,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:04:51,721 INFO L87 Difference]: Start difference. First operand 10520 states and 37703 transitions. Second operand has 16 states, 16 states have (on average 2.875) 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) [2021-05-03 16:04:52,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:52,738 INFO L93 Difference]: Finished difference Result 14024 states and 49557 transitions. [2021-05-03 16:04:52,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 16:04:52,738 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) 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 30 [2021-05-03 16:04:52,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:52,790 INFO L225 Difference]: With dead ends: 14024 [2021-05-03 16:04:52,790 INFO L226 Difference]: Without dead ends: 13991 [2021-05-03 16:04:52,790 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 795.9ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-05-03 16:04:52,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13991 states. [2021-05-03 16:04:52,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13991 to 10532. [2021-05-03 16:04:53,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10532 states, 10531 states have (on average 3.5856993637831165) internal successors, (37761), 10531 states have internal predecessors, (37761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:53,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10532 states to 10532 states and 37761 transitions. [2021-05-03 16:04:53,060 INFO L78 Accepts]: Start accepts. Automaton has 10532 states and 37761 transitions. Word has length 30 [2021-05-03 16:04:53,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:53,060 INFO L480 AbstractCegarLoop]: Abstraction has 10532 states and 37761 transitions. [2021-05-03 16:04:53,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) 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) [2021-05-03 16:04:53,061 INFO L276 IsEmpty]: Start isEmpty. Operand 10532 states and 37761 transitions. [2021-05-03 16:04:53,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:04:53,083 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:53,083 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:53,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-05-03 16:04:53,283 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:53,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:53,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1732935021, now seen corresponding path program 26 times [2021-05-03 16:04:53,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:53,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456246330] [2021-05-03 16:04:53,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:53,675 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:53,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456246330] [2021-05-03 16:04:53,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5600378] [2021-05-03 16:04:53,676 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:53,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:04:53,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:04:53,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 16:04:53,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:53,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-05-03 16:04:53,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:53,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:53,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:53,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:42 [2021-05-03 16:04:53,881 INFO L446 ElimStorePlain]: Different costs {1=[v_C_36], 5=[A, B]} [2021-05-03 16:04:53,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:53,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-05-03 16:04:53,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:53,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:53,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:53,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:04:53,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 37 [2021-05-03 16:04:53,907 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:53,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:53,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:53,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:04:53,920 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 46 treesize of output 30 [2021-05-03 16:04:53,921 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:53,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:53,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:53,930 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:58, output treesize:20 [2021-05-03 16:04:53,980 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 9 treesize of output 5 [2021-05-03 16:04:53,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:53,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:53,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:53,986 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:5 [2021-05-03 16:04:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:54,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:54,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-05-03 16:04:54,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482081251] [2021-05-03 16:04:54,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:04:54,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:54,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:04:54,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:04:54,014 INFO L87 Difference]: Start difference. First operand 10532 states and 37761 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 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) [2021-05-03 16:04:55,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:55,083 INFO L93 Difference]: Finished difference Result 16102 states and 57119 transitions. [2021-05-03 16:04:55,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 16:04:55,084 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 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 30 [2021-05-03 16:04:55,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:55,144 INFO L225 Difference]: With dead ends: 16102 [2021-05-03 16:04:55,144 INFO L226 Difference]: Without dead ends: 16039 [2021-05-03 16:04:55,145 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 804.7ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-05-03 16:04:55,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16039 states. [2021-05-03 16:04:55,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16039 to 10494. [2021-05-03 16:04:55,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10494 states, 10493 states have (on average 3.5870580386924615) internal successors, (37639), 10493 states have internal predecessors, (37639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:55,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10494 states to 10494 states and 37639 transitions. [2021-05-03 16:04:55,450 INFO L78 Accepts]: Start accepts. Automaton has 10494 states and 37639 transitions. Word has length 30 [2021-05-03 16:04:55,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:55,450 INFO L480 AbstractCegarLoop]: Abstraction has 10494 states and 37639 transitions. [2021-05-03 16:04:55,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 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) [2021-05-03 16:04:55,451 INFO L276 IsEmpty]: Start isEmpty. Operand 10494 states and 37639 transitions. [2021-05-03 16:04:55,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:04:55,476 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:55,476 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:55,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-05-03 16:04:55,678 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:55,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:55,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1418556337, now seen corresponding path program 27 times [2021-05-03 16:04:55,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:55,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473317095] [2021-05-03 16:04:55,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:55,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:56,008 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:56,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473317095] [2021-05-03 16:04:56,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969602738] [2021-05-03 16:04:56,008 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:56,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:04:56,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:04:56,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 16:04:56,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:56,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:04:56,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:56,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:56,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:56,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-05-03 16:04:56,367 INFO L446 ElimStorePlain]: Different costs {0=[v_C_38], 2=[A, B]} [2021-05-03 16:04:56,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-05-03 16:04:56,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:56,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:56,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:56,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:04:56,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 16:04:56,411 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:56,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:56,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:56,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:04:56,436 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 25 treesize of output 17 [2021-05-03 16:04:56,438 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:56,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:56,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:56,456 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:61, output treesize:24 [2021-05-03 16:04:56,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:56,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-05-03 16:04:56,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:04:56,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:56,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:56,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:58 [2021-05-03 16:04:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:56,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:56,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-05-03 16:04:56,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266211659] [2021-05-03 16:04:56,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 16:04:56,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:56,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 16:04:56,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:04:56,708 INFO L87 Difference]: Start difference. First operand 10494 states and 37639 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:57,897 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-05-03 16:04:58,235 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2021-05-03 16:04:59,574 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-05-03 16:04:59,742 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-05-03 16:04:59,908 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-05-03 16:05:00,175 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-05-03 16:05:00,422 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 60 [2021-05-03 16:05:00,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:00,922 INFO L93 Difference]: Finished difference Result 16315 states and 57691 transitions. [2021-05-03 16:05:00,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 16:05:00,922 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:05:00,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:00,959 INFO L225 Difference]: With dead ends: 16315 [2021-05-03 16:05:00,959 INFO L226 Difference]: Without dead ends: 16196 [2021-05-03 16:05:00,960 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 3043.9ms TimeCoverageRelationStatistics Valid=292, Invalid=1870, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 16:05:00,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16196 states. [2021-05-03 16:05:01,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16196 to 10514. [2021-05-03 16:05:01,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10514 states, 10513 states have (on average 3.586892418909921) internal successors, (37709), 10513 states have internal predecessors, (37709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:01,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10514 states to 10514 states and 37709 transitions. [2021-05-03 16:05:01,224 INFO L78 Accepts]: Start accepts. Automaton has 10514 states and 37709 transitions. Word has length 30 [2021-05-03 16:05:01,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:01,224 INFO L480 AbstractCegarLoop]: Abstraction has 10514 states and 37709 transitions. [2021-05-03 16:05:01,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:01,224 INFO L276 IsEmpty]: Start isEmpty. Operand 10514 states and 37709 transitions. [2021-05-03 16:05:01,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:05:01,251 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:01,251 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:01,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:01,452 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:01,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:01,452 INFO L82 PathProgramCache]: Analyzing trace with hash -726307267, now seen corresponding path program 28 times [2021-05-03 16:05:01,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:01,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973967701] [2021-05-03 16:05:01,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:01,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:01,815 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:01,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973967701] [2021-05-03 16:05:01,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668849065] [2021-05-03 16:05:01,815 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:01,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:05:01,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:01,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 16:05:01,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:01,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:05:01,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:01,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:01,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:01,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-05-03 16:05:02,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:02,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2021-05-03 16:05:02,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:02,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:02,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:02,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:69, output treesize:68 [2021-05-03 16:05:02,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:02,120 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 43 treesize of output 31 [2021-05-03 16:05:02,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:02,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:02,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:02,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:48 [2021-05-03 16:05:02,180 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 25 treesize of output 17 [2021-05-03 16:05:02,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:02,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:02,189 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 20 treesize of output 12 [2021-05-03 16:05:02,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:02,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:02,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:02,193 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:5 [2021-05-03 16:05:02,218 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:02,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:02,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-05-03 16:05:02,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535066199] [2021-05-03 16:05:02,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:05:02,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:02,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:05:02,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:05:02,219 INFO L87 Difference]: Start difference. First operand 10514 states and 37709 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:02,551 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-05-03 16:05:03,035 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-05-03 16:05:03,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:03,780 INFO L93 Difference]: Finished difference Result 16713 states and 59099 transitions. [2021-05-03 16:05:03,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 16:05:03,781 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:05:03,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:03,845 INFO L225 Difference]: With dead ends: 16713 [2021-05-03 16:05:03,845 INFO L226 Difference]: Without dead ends: 16652 [2021-05-03 16:05:03,846 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1300.3ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:05:03,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16652 states. [2021-05-03 16:05:04,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16652 to 10544. [2021-05-03 16:05:04,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10544 states, 10543 states have (on average 3.5849378734705493) internal successors, (37796), 10543 states have internal predecessors, (37796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:04,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10544 states to 10544 states and 37796 transitions. [2021-05-03 16:05:04,175 INFO L78 Accepts]: Start accepts. Automaton has 10544 states and 37796 transitions. Word has length 30 [2021-05-03 16:05:04,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:04,175 INFO L480 AbstractCegarLoop]: Abstraction has 10544 states and 37796 transitions. [2021-05-03 16:05:04,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:04,175 INFO L276 IsEmpty]: Start isEmpty. Operand 10544 states and 37796 transitions. [2021-05-03 16:05:04,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:05:04,205 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:04,205 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:04,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:04,406 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:04,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:04,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1845102559, now seen corresponding path program 29 times [2021-05-03 16:05:04,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:04,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592529286] [2021-05-03 16:05:04,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:04,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:04,782 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:04,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592529286] [2021-05-03 16:05:04,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205412700] [2021-05-03 16:05:04,783 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:04,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 16:05:04,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:04,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 16:05:04,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:04,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-05-03 16:05:04,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:04,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:04,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:04,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-05-03 16:05:05,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:05,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:05,111 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-05-03 16:05:05,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 46 [2021-05-03 16:05:05,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:05,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:05,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:05,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:73 [2021-05-03 16:05:05,227 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 32 treesize of output 24 [2021-05-03 16:05:05,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:05,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:05,247 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 27 treesize of output 19 [2021-05-03 16:05:05,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:05,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:05,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:05,261 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:54, output treesize:25 [2021-05-03 16:05:05,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:05,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:05,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:05,331 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 [2021-05-03 16:05:05,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:05:05,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:05,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:05,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:21 [2021-05-03 16:05:05,451 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:05,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:05,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 16:05:05,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358900360] [2021-05-03 16:05:05,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 16:05:05,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:05,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 16:05:05,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-05-03 16:05:05,453 INFO L87 Difference]: Start difference. First operand 10544 states and 37796 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:06,241 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-05-03 16:05:06,587 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-05-03 16:05:08,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:08,888 INFO L93 Difference]: Finished difference Result 17437 states and 61320 transitions. [2021-05-03 16:05:08,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 16:05:08,889 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:05:08,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:08,961 INFO L225 Difference]: With dead ends: 17437 [2021-05-03 16:05:08,962 INFO L226 Difference]: Without dead ends: 17238 [2021-05-03 16:05:08,962 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 2601.8ms TimeCoverageRelationStatistics Valid=371, Invalid=1885, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 16:05:08,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17238 states. [2021-05-03 16:05:09,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17238 to 10532. [2021-05-03 16:05:09,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10532 states, 10531 states have (on average 3.5855094482955083) internal successors, (37759), 10531 states have internal predecessors, (37759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:09,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10532 states to 10532 states and 37759 transitions. [2021-05-03 16:05:09,297 INFO L78 Accepts]: Start accepts. Automaton has 10532 states and 37759 transitions. Word has length 30 [2021-05-03 16:05:09,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:09,297 INFO L480 AbstractCegarLoop]: Abstraction has 10532 states and 37759 transitions. [2021-05-03 16:05:09,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:09,297 INFO L276 IsEmpty]: Start isEmpty. Operand 10532 states and 37759 transitions. [2021-05-03 16:05:09,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:05:09,323 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:09,323 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:09,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-05-03 16:05:09,524 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:09,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:09,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1071325629, now seen corresponding path program 30 times [2021-05-03 16:05:09,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:09,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582959394] [2021-05-03 16:05:09,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:09,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:09,709 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:09,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582959394] [2021-05-03 16:05:09,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726776893] [2021-05-03 16:05:09,710 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:09,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 16:05:09,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:09,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-03 16:05:09,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:09,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:05:09,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:09,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:09,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:09,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-05-03 16:05:09,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:09,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2021-05-03 16:05:09,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:09,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:09,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:09,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:51 [2021-05-03 16:05:09,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:09,984 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 41 treesize of output 29 [2021-05-03 16:05:09,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:09,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:09,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:09,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:30 [2021-05-03 16:05:10,069 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 25 treesize of output 17 [2021-05-03 16:05:10,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:10,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:10,079 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 20 treesize of output 12 [2021-05-03 16:05:10,080 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:10,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:10,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:10,084 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-05-03 16:05:10,130 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:10,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:10,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-03 16:05:10,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813980925] [2021-05-03 16:05:10,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:05:10,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:10,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:05:10,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:05:10,133 INFO L87 Difference]: Start difference. First operand 10532 states and 37759 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:10,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:10,434 INFO L93 Difference]: Finished difference Result 11495 states and 40806 transitions. [2021-05-03 16:05:10,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 16:05:10,435 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:05:10,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:10,477 INFO L225 Difference]: With dead ends: 11495 [2021-05-03 16:05:10,477 INFO L226 Difference]: Without dead ends: 11467 [2021-05-03 16:05:10,478 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 294.7ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:05:10,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11467 states. [2021-05-03 16:05:10,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11467 to 10570. [2021-05-03 16:05:10,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10570 states, 10569 states have (on average 3.58321506291986) internal successors, (37871), 10569 states have internal predecessors, (37871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:10,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10570 states to 10570 states and 37871 transitions. [2021-05-03 16:05:10,745 INFO L78 Accepts]: Start accepts. Automaton has 10570 states and 37871 transitions. Word has length 30 [2021-05-03 16:05:10,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:10,745 INFO L480 AbstractCegarLoop]: Abstraction has 10570 states and 37871 transitions. [2021-05-03 16:05:10,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:10,745 INFO L276 IsEmpty]: Start isEmpty. Operand 10570 states and 37871 transitions. [2021-05-03 16:05:10,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:05:10,773 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:10,773 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:10,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-05-03 16:05:10,974 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:10,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:10,975 INFO L82 PathProgramCache]: Analyzing trace with hash -349125983, now seen corresponding path program 31 times [2021-05-03 16:05:10,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:10,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864296509] [2021-05-03 16:05:10,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:10,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:11,139 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:11,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864296509] [2021-05-03 16:05:11,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510240363] [2021-05-03 16:05:11,140 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:11,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:11,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 16:05:11,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:11,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:05:11,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:11,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:11,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:11,228 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-05-03 16:05:11,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:11,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2021-05-03 16:05:11,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:11,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:11,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:11,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:54 [2021-05-03 16:05:11,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:11,417 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 43 treesize of output 31 [2021-05-03 16:05:11,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:11,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:11,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:11,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:48 [2021-05-03 16:05:11,474 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 25 treesize of output 17 [2021-05-03 16:05:11,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:11,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:11,482 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 20 treesize of output 12 [2021-05-03 16:05:11,483 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:11,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:11,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:11,486 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:5 [2021-05-03 16:05:11,508 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:11,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:11,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-03 16:05:11,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243852149] [2021-05-03 16:05:11,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:05:11,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:11,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:05:11,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:05:11,510 INFO L87 Difference]: Start difference. First operand 10570 states and 37871 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:11,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:11,864 INFO L93 Difference]: Finished difference Result 11381 states and 40464 transitions. [2021-05-03 16:05:11,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 16:05:11,865 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:05:11,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:11,899 INFO L225 Difference]: With dead ends: 11381 [2021-05-03 16:05:11,900 INFO L226 Difference]: Without dead ends: 11347 [2021-05-03 16:05:11,900 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 289.6ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:05:11,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11347 states. [2021-05-03 16:05:12,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11347 to 10597. [2021-05-03 16:05:12,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10597 states, 10596 states have (on average 3.5820120800302) internal successors, (37955), 10596 states have internal predecessors, (37955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:12,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10597 states to 10597 states and 37955 transitions. [2021-05-03 16:05:12,251 INFO L78 Accepts]: Start accepts. Automaton has 10597 states and 37955 transitions. Word has length 30 [2021-05-03 16:05:12,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:12,251 INFO L480 AbstractCegarLoop]: Abstraction has 10597 states and 37955 transitions. [2021-05-03 16:05:12,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:12,252 INFO L276 IsEmpty]: Start isEmpty. Operand 10597 states and 37955 transitions. [2021-05-03 16:05:12,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:05:12,276 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:12,276 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:12,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:12,477 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:12,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:12,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1368944027, now seen corresponding path program 32 times [2021-05-03 16:05:12,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:12,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111574994] [2021-05-03 16:05:12,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:12,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:12,646 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:12,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111574994] [2021-05-03 16:05:12,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440573410] [2021-05-03 16:05:12,647 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:12,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:05:12,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:12,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 16:05:12,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:12,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-05-03 16:05:12,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:12,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:12,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:12,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-05-03 16:05:12,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:12,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2021-05-03 16:05:12,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:12,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:12,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:12,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:51 [2021-05-03 16:05:12,994 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 30 treesize of output 22 [2021-05-03 16:05:12,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:13,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:13,013 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 25 treesize of output 17 [2021-05-03 16:05:13,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:13,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:13,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:13,024 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:20 [2021-05-03 16:05:13,060 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 9 treesize of output 5 [2021-05-03 16:05:13,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:13,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:13,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:13,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:5 [2021-05-03 16:05:13,099 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:13,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:13,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-03 16:05:13,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612804574] [2021-05-03 16:05:13,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:05:13,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:13,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:05:13,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:05:13,100 INFO L87 Difference]: Start difference. First operand 10597 states and 37955 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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) [2021-05-03 16:05:13,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:13,580 INFO L93 Difference]: Finished difference Result 11584 states and 41048 transitions. [2021-05-03 16:05:13,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 16:05:13,581 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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 30 [2021-05-03 16:05:13,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:13,622 INFO L225 Difference]: With dead ends: 11584 [2021-05-03 16:05:13,622 INFO L226 Difference]: Without dead ends: 11535 [2021-05-03 16:05:13,622 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 348.4ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:05:13,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11535 states. [2021-05-03 16:05:13,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11535 to 10601. [2021-05-03 16:05:13,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10601 states, 10600 states have (on average 3.5827358490566037) internal successors, (37977), 10600 states have internal predecessors, (37977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:13,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10601 states to 10601 states and 37977 transitions. [2021-05-03 16:05:13,890 INFO L78 Accepts]: Start accepts. Automaton has 10601 states and 37977 transitions. Word has length 30 [2021-05-03 16:05:13,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:13,890 INFO L480 AbstractCegarLoop]: Abstraction has 10601 states and 37977 transitions. [2021-05-03 16:05:13,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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) [2021-05-03 16:05:13,890 INFO L276 IsEmpty]: Start isEmpty. Operand 10601 states and 37977 transitions. [2021-05-03 16:05:13,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:05:13,917 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:13,917 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:14,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-05-03 16:05:14,118 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:14,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:14,118 INFO L82 PathProgramCache]: Analyzing trace with hash 5796635, now seen corresponding path program 33 times [2021-05-03 16:05:14,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:14,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124841166] [2021-05-03 16:05:14,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:14,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:14,526 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:14,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124841166] [2021-05-03 16:05:14,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309491883] [2021-05-03 16:05:14,527 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:14,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:05:14,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:14,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 16:05:14,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:14,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-05-03 16:05:14,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:14,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:14,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:14,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-05-03 16:05:15,030 INFO L446 ElimStorePlain]: Different costs {0=[v_C_50], 2=[A, B]} [2021-05-03 16:05:15,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-05-03 16:05:15,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:15,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:15,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:15,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:15,082 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 32 [2021-05-03 16:05:15,084 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 16:05:15,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:15,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:15,119 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:15,119 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 31 [2021-05-03 16:05:15,125 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:05:15,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:15,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:15,153 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:61, output treesize:30 [2021-05-03 16:05:15,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:15,317 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 9 treesize of output 14 [2021-05-03 16:05:15,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:05:15,340 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:15,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-05-03 16:05:15,346 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 16:05:15,418 INFO L628 ElimStorePlain]: treesize reduction 9, result has 87.1 percent of original size [2021-05-03 16:05:15,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:05:15,438 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:71 [2021-05-03 16:05:15,539 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:15,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:15,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 16:05:15,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100185829] [2021-05-03 16:05:15,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 16:05:15,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:15,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 16:05:15,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-05-03 16:05:15,541 INFO L87 Difference]: Start difference. First operand 10601 states and 37977 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:16,824 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-05-03 16:05:17,685 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-05-03 16:05:19,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:19,887 INFO L93 Difference]: Finished difference Result 16921 states and 59570 transitions. [2021-05-03 16:05:19,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 16:05:19,888 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:05:19,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:19,957 INFO L225 Difference]: With dead ends: 16921 [2021-05-03 16:05:19,958 INFO L226 Difference]: Without dead ends: 16739 [2021-05-03 16:05:19,959 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 3364.1ms TimeCoverageRelationStatistics Valid=422, Invalid=2770, Unknown=0, NotChecked=0, Total=3192 [2021-05-03 16:05:19,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16739 states. [2021-05-03 16:05:20,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16739 to 10629. [2021-05-03 16:05:20,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10629 states, 10628 states have (on average 3.5825178773052313) internal successors, (38075), 10628 states have internal predecessors, (38075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:20,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10629 states to 10629 states and 38075 transitions. [2021-05-03 16:05:20,276 INFO L78 Accepts]: Start accepts. Automaton has 10629 states and 38075 transitions. Word has length 30 [2021-05-03 16:05:20,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:20,277 INFO L480 AbstractCegarLoop]: Abstraction has 10629 states and 38075 transitions. [2021-05-03 16:05:20,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:20,277 INFO L276 IsEmpty]: Start isEmpty. Operand 10629 states and 38075 transitions. [2021-05-03 16:05:20,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:05:20,303 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:20,303 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:20,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:20,504 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:20,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:20,504 INFO L82 PathProgramCache]: Analyzing trace with hash -2139066969, now seen corresponding path program 34 times [2021-05-03 16:05:20,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:20,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343057712] [2021-05-03 16:05:20,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:20,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:20,913 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:20,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343057712] [2021-05-03 16:05:20,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674881702] [2021-05-03 16:05:20,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:20,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:05:20,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:20,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 16:05:20,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:21,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:05:21,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:21,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:21,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:21,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-05-03 16:05:21,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-05-03 16:05:21,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:21,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:21,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:21,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-05-03 16:05:21,192 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 32 treesize of output 24 [2021-05-03 16:05:21,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:21,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:21,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:21,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:29 [2021-05-03 16:05:21,243 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 25 treesize of output 17 [2021-05-03 16:05:21,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:21,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:21,252 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 24 treesize of output 16 [2021-05-03 16:05:21,254 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:21,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:21,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:21,256 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:5 [2021-05-03 16:05:21,293 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:21,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:21,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-05-03 16:05:21,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982516913] [2021-05-03 16:05:21,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:05:21,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:21,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:05:21,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:05:21,294 INFO L87 Difference]: Start difference. First operand 10629 states and 38075 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:22,164 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-05-03 16:05:23,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:23,262 INFO L93 Difference]: Finished difference Result 17261 states and 60804 transitions. [2021-05-03 16:05:23,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 16:05:23,263 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:05:23,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:23,329 INFO L225 Difference]: With dead ends: 17261 [2021-05-03 16:05:23,329 INFO L226 Difference]: Without dead ends: 17200 [2021-05-03 16:05:23,329 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1485.7ms TimeCoverageRelationStatistics Valid=229, Invalid=1103, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 16:05:23,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17200 states. [2021-05-03 16:05:23,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17200 to 10673. [2021-05-03 16:05:23,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10673 states, 10672 states have (on average 3.58095952023988) internal successors, (38216), 10672 states have internal predecessors, (38216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:23,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10673 states to 10673 states and 38216 transitions. [2021-05-03 16:05:23,658 INFO L78 Accepts]: Start accepts. Automaton has 10673 states and 38216 transitions. Word has length 30 [2021-05-03 16:05:23,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:23,658 INFO L480 AbstractCegarLoop]: Abstraction has 10673 states and 38216 transitions. [2021-05-03 16:05:23,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:23,659 INFO L276 IsEmpty]: Start isEmpty. Operand 10673 states and 38216 transitions. [2021-05-03 16:05:23,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:05:23,688 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:23,688 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:23,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-05-03 16:05:23,909 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:23,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:23,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1037105035, now seen corresponding path program 35 times [2021-05-03 16:05:23,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:23,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090128397] [2021-05-03 16:05:23,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:23,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:24,240 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-05-03 16:05:24,461 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:24,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090128397] [2021-05-03 16:05:24,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005854528] [2021-05-03 16:05:24,462 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:24,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 16:05:24,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:24,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 16:05:24,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:24,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:05:24,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:24,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:24,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:24,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-05-03 16:05:24,879 INFO L354 Elim1Store]: treesize reduction 76, result has 14.6 percent of original size [2021-05-03 16:05:24,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 116 [2021-05-03 16:05:24,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:24,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:24,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:24,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:157, output treesize:73 [2021-05-03 16:05:24,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:24,981 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 107 treesize of output 65 [2021-05-03 16:05:24,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:24,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:25,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:25,002 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 93 treesize of output 51 [2021-05-03 16:05:25,005 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:25,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:25,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:25,020 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:169, output treesize:68 [2021-05-03 16:05:25,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:25,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:25,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:25,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:05:25,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 16:05:25,166 INFO L628 ElimStorePlain]: treesize reduction 23, result has 48.9 percent of original size [2021-05-03 16:05:25,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:25,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:21 [2021-05-03 16:05:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:25,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:25,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 16:05:25,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763779007] [2021-05-03 16:05:25,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 16:05:25,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:25,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 16:05:25,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-05-03 16:05:25,262 INFO L87 Difference]: Start difference. First operand 10673 states and 38216 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:26,380 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-05-03 16:05:28,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:28,286 INFO L93 Difference]: Finished difference Result 17422 states and 61248 transitions. [2021-05-03 16:05:28,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 16:05:28,287 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:05:28,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:28,355 INFO L225 Difference]: With dead ends: 17422 [2021-05-03 16:05:28,355 INFO L226 Difference]: Without dead ends: 17254 [2021-05-03 16:05:28,356 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 2545.8ms TimeCoverageRelationStatistics Valid=362, Invalid=1800, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 16:05:28,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17254 states. [2021-05-03 16:05:28,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17254 to 10655. [2021-05-03 16:05:28,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10655 states, 10654 states have (on average 3.5826919466866904) internal successors, (38170), 10654 states have internal predecessors, (38170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:28,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10655 states to 10655 states and 38170 transitions. [2021-05-03 16:05:28,673 INFO L78 Accepts]: Start accepts. Automaton has 10655 states and 38170 transitions. Word has length 30 [2021-05-03 16:05:28,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:28,674 INFO L480 AbstractCegarLoop]: Abstraction has 10655 states and 38170 transitions. [2021-05-03 16:05:28,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:28,674 INFO L276 IsEmpty]: Start isEmpty. Operand 10655 states and 38170 transitions. [2021-05-03 16:05:28,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:05:28,702 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:28,702 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:28,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-05-03 16:05:28,903 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:28,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:28,903 INFO L82 PathProgramCache]: Analyzing trace with hash -354822415, now seen corresponding path program 36 times [2021-05-03 16:05:28,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:28,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118588810] [2021-05-03 16:05:28,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:28,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:29,361 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:29,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118588810] [2021-05-03 16:05:29,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969933492] [2021-05-03 16:05:29,361 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:29,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:05:29,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:29,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-03 16:05:29,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:29,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-05-03 16:05:29,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:29,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:29,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:29,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-05-03 16:05:29,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-05-03 16:05:29,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:29,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:29,776 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 32 treesize of output 24 [2021-05-03 16:05:29,779 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:29,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:29,794 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 27 treesize of output 19 [2021-05-03 16:05:29,796 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:29,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:29,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:29,806 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:23 [2021-05-03 16:05:29,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:29,879 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-05-03 16:05:29,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:05:29,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:29,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:29,934 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:53 [2021-05-03 16:05:30,000 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:30,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:30,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-03 16:05:30,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528993292] [2021-05-03 16:05:30,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:05:30,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:30,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:05:30,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:05:30,002 INFO L87 Difference]: Start difference. First operand 10655 states and 38170 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:30,785 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2021-05-03 16:05:32,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:32,057 INFO L93 Difference]: Finished difference Result 17158 states and 60402 transitions. [2021-05-03 16:05:32,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 16:05:32,058 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:05:32,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:32,120 INFO L225 Difference]: With dead ends: 17158 [2021-05-03 16:05:32,120 INFO L226 Difference]: Without dead ends: 17015 [2021-05-03 16:05:32,121 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1758.0ms TimeCoverageRelationStatistics Valid=235, Invalid=955, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 16:05:32,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17015 states. [2021-05-03 16:05:32,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17015 to 10667. [2021-05-03 16:05:32,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10667 states, 10666 states have (on average 3.5827864241515095) internal successors, (38214), 10666 states have internal predecessors, (38214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:32,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10667 states to 10667 states and 38214 transitions. [2021-05-03 16:05:32,448 INFO L78 Accepts]: Start accepts. Automaton has 10667 states and 38214 transitions. Word has length 30 [2021-05-03 16:05:32,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:32,448 INFO L480 AbstractCegarLoop]: Abstraction has 10667 states and 38214 transitions. [2021-05-03 16:05:32,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:32,448 INFO L276 IsEmpty]: Start isEmpty. Operand 10667 states and 38214 transitions. [2021-05-03 16:05:32,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:05:32,475 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:32,475 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:32,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:32,676 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:32,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:32,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1431415003, now seen corresponding path program 37 times [2021-05-03 16:05:32,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:32,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524483119] [2021-05-03 16:05:32,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:32,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:33,038 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:33,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524483119] [2021-05-03 16:05:33,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606003063] [2021-05-03 16:05:33,039 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:33,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:33,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 16:05:33,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:33,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-05-03 16:05:33,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:33,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:33,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:33,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-05-03 16:05:33,339 INFO L446 ElimStorePlain]: Different costs {0=[A, B], 2=[v_C_58]} [2021-05-03 16:05:33,344 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 33 treesize of output 25 [2021-05-03 16:05:33,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:33,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:33,365 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 28 treesize of output 20 [2021-05-03 16:05:33,366 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:33,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:33,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:05:33,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-05-03 16:05:33,382 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:33,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:33,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:33,391 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:52, output treesize:26 [2021-05-03 16:05:33,446 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 [2021-05-03 16:05:33,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:33,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:33,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:33,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:5 [2021-05-03 16:05:33,481 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:33,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:33,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-05-03 16:05:33,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906031286] [2021-05-03 16:05:33,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:05:33,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:33,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:05:33,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:05:33,483 INFO L87 Difference]: Start difference. First operand 10667 states and 38214 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:35,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:35,151 INFO L93 Difference]: Finished difference Result 16652 states and 58930 transitions. [2021-05-03 16:05:35,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 16:05:35,153 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:05:35,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:35,219 INFO L225 Difference]: With dead ends: 16652 [2021-05-03 16:05:35,219 INFO L226 Difference]: Without dead ends: 16575 [2021-05-03 16:05:35,220 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1342.9ms TimeCoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 16:05:35,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16575 states. [2021-05-03 16:05:35,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16575 to 10705. [2021-05-03 16:05:35,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10705 states, 10704 states have (on average 3.582772795216741) internal successors, (38350), 10704 states have internal predecessors, (38350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:35,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10705 states to 10705 states and 38350 transitions. [2021-05-03 16:05:35,559 INFO L78 Accepts]: Start accepts. Automaton has 10705 states and 38350 transitions. Word has length 30 [2021-05-03 16:05:35,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:35,559 INFO L480 AbstractCegarLoop]: Abstraction has 10705 states and 38350 transitions. [2021-05-03 16:05:35,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:35,559 INFO L276 IsEmpty]: Start isEmpty. Operand 10705 states and 38350 transitions. [2021-05-03 16:05:35,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:05:35,594 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:35,594 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:35,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:35,801 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:35,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:35,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1143539301, now seen corresponding path program 38 times [2021-05-03 16:05:35,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:35,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860733130] [2021-05-03 16:05:35,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:35,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:36,170 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:36,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860733130] [2021-05-03 16:05:36,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877606766] [2021-05-03 16:05:36,171 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:36,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:05:36,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:36,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 16:05:36,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:36,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:05:36,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:36,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:36,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:36,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-05-03 16:05:36,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:36,499 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 42 treesize of output 30 [2021-05-03 16:05:36,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:36,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:36,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:36,516 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 38 treesize of output 26 [2021-05-03 16:05:36,518 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:36,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:36,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:36,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 21 [2021-05-03 16:05:36,533 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:36,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:36,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:36,543 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:65, output treesize:28 [2021-05-03 16:05:36,627 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 [2021-05-03 16:05:36,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:36,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:36,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:36,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:12 [2021-05-03 16:05:36,694 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:36,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:36,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-03 16:05:36,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84465962] [2021-05-03 16:05:36,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:05:36,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:36,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:05:36,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:05:36,696 INFO L87 Difference]: Start difference. First operand 10705 states and 38350 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:37,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:37,811 INFO L93 Difference]: Finished difference Result 16383 states and 58155 transitions. [2021-05-03 16:05:37,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:05:37,812 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:05:37,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:37,872 INFO L225 Difference]: With dead ends: 16383 [2021-05-03 16:05:37,872 INFO L226 Difference]: Without dead ends: 16356 [2021-05-03 16:05:37,873 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 820.8ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-05-03 16:05:37,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16356 states. [2021-05-03 16:05:38,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16356 to 10811. [2021-05-03 16:05:38,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10811 states, 10810 states have (on average 3.582053654024052) internal successors, (38722), 10810 states have internal predecessors, (38722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:38,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10811 states to 10811 states and 38722 transitions. [2021-05-03 16:05:38,174 INFO L78 Accepts]: Start accepts. Automaton has 10811 states and 38722 transitions. Word has length 30 [2021-05-03 16:05:38,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:38,174 INFO L480 AbstractCegarLoop]: Abstraction has 10811 states and 38722 transitions. [2021-05-03 16:05:38,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:38,174 INFO L276 IsEmpty]: Start isEmpty. Operand 10811 states and 38722 transitions. [2021-05-03 16:05:38,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:05:38,201 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:38,201 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:38,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:38,404 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:38,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:38,407 INFO L82 PathProgramCache]: Analyzing trace with hash 426491389, now seen corresponding path program 39 times [2021-05-03 16:05:38,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:38,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639553011] [2021-05-03 16:05:38,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:38,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:38,686 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:38,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639553011] [2021-05-03 16:05:38,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340896462] [2021-05-03 16:05:38,687 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:38,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 16:05:38,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:38,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-03 16:05:38,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:38,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:05:38,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:38,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:38,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:38,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-05-03 16:05:38,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:38,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:05:38,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:38,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:38,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:38,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:70, output treesize:69 [2021-05-03 16:05:39,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:39,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:05:39,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 31 [2021-05-03 16:05:39,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:39,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:39,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:39,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:48 [2021-05-03 16:05:39,294 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 25 treesize of output 17 [2021-05-03 16:05:39,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:39,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:39,303 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 20 treesize of output 12 [2021-05-03 16:05:39,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:39,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:39,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:39,308 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-05-03 16:05:39,345 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:39,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:39,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 16:05:39,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554531928] [2021-05-03 16:05:39,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:05:39,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:39,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:05:39,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:05:39,347 INFO L87 Difference]: Start difference. First operand 10811 states and 38722 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:40,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:40,249 INFO L93 Difference]: Finished difference Result 11960 states and 42339 transitions. [2021-05-03 16:05:40,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 16:05:40,250 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:05:40,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:40,289 INFO L225 Difference]: With dead ends: 11960 [2021-05-03 16:05:40,289 INFO L226 Difference]: Without dead ends: 11927 [2021-05-03 16:05:40,289 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 770.4ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:05:40,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11927 states. [2021-05-03 16:05:40,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11927 to 10850. [2021-05-03 16:05:40,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10850 states, 10849 states have (on average 3.5809752050880266) internal successors, (38850), 10849 states have internal predecessors, (38850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:40,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10850 states to 10850 states and 38850 transitions. [2021-05-03 16:05:40,610 INFO L78 Accepts]: Start accepts. Automaton has 10850 states and 38850 transitions. Word has length 30 [2021-05-03 16:05:40,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:40,611 INFO L480 AbstractCegarLoop]: Abstraction has 10850 states and 38850 transitions. [2021-05-03 16:05:40,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:40,611 INFO L276 IsEmpty]: Start isEmpty. Operand 10850 states and 38850 transitions. [2021-05-03 16:05:40,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:05:40,641 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:40,641 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:40,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-05-03 16:05:40,842 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:40,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:40,842 INFO L82 PathProgramCache]: Analyzing trace with hash -692303903, now seen corresponding path program 40 times [2021-05-03 16:05:40,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:40,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654367175] [2021-05-03 16:05:40,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:40,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:41,091 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:41,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654367175] [2021-05-03 16:05:41,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553874079] [2021-05-03 16:05:41,091 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:41,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:05:41,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:41,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 16:05:41,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:41,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:05:41,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:41,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:41,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:41,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-05-03 16:05:41,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:41,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:05:41,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:41,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:41,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:41,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:54 [2021-05-03 16:05:41,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:41,429 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 107 treesize of output 65 [2021-05-03 16:05:41,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:41,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:41,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:41,448 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 94 treesize of output 52 [2021-05-03 16:05:41,449 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:41,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:41,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:41,458 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:158, output treesize:57 [2021-05-03 16:05:41,495 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 [2021-05-03 16:05:41,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:41,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:41,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:41,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:5 [2021-05-03 16:05:41,531 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:41,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:41,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-05-03 16:05:41,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864074705] [2021-05-03 16:05:41,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:05:41,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:41,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:05:41,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:05:41,532 INFO L87 Difference]: Start difference. First operand 10850 states and 38850 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 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) [2021-05-03 16:05:42,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:42,034 INFO L93 Difference]: Finished difference Result 11577 states and 41085 transitions. [2021-05-03 16:05:42,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 16:05:42,035 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 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 30 [2021-05-03 16:05:42,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:42,071 INFO L225 Difference]: With dead ends: 11577 [2021-05-03 16:05:42,072 INFO L226 Difference]: Without dead ends: 11504 [2021-05-03 16:05:42,072 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 501.1ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:05:42,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11504 states. [2021-05-03 16:05:42,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11504 to 10850. [2021-05-03 16:05:42,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10850 states, 10849 states have (on average 3.5809752050880266) internal successors, (38850), 10849 states have internal predecessors, (38850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:42,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10850 states to 10850 states and 38850 transitions. [2021-05-03 16:05:42,323 INFO L78 Accepts]: Start accepts. Automaton has 10850 states and 38850 transitions. Word has length 30 [2021-05-03 16:05:42,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:42,323 INFO L480 AbstractCegarLoop]: Abstraction has 10850 states and 38850 transitions. [2021-05-03 16:05:42,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 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) [2021-05-03 16:05:42,323 INFO L276 IsEmpty]: Start isEmpty. Operand 10850 states and 38850 transitions. [2021-05-03 16:05:42,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:05:42,345 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:42,345 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:42,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-05-03 16:05:42,546 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:42,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:42,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1652951515, now seen corresponding path program 41 times [2021-05-03 16:05:42,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:42,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083581253] [2021-05-03 16:05:42,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:42,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:42,836 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:42,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083581253] [2021-05-03 16:05:42,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167163135] [2021-05-03 16:05:42,837 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:42,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 16:05:42,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:42,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-03 16:05:42,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:42,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:05:42,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:42,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:42,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:42,965 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-05-03 16:05:43,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:43,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:05:43,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:43,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:43,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:43,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:59 [2021-05-03 16:05:43,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:43,348 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 41 treesize of output 29 [2021-05-03 16:05:43,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:43,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:43,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:43,370 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 37 treesize of output 25 [2021-05-03 16:05:43,372 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:43,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:43,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:43,384 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:64, output treesize:28 [2021-05-03 16:05:43,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:43,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:05:43,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:43,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:05:43,487 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 13 [2021-05-03 16:05:43,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:43,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:43,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:43,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:5 [2021-05-03 16:05:43,542 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:43,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:43,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 16:05:43,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307457430] [2021-05-03 16:05:43,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 16:05:43,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:43,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 16:05:43,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:05:43,544 INFO L87 Difference]: Start difference. First operand 10850 states and 38850 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2021-05-03 16:05:44,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:44,331 INFO L93 Difference]: Finished difference Result 11507 states and 40815 transitions. [2021-05-03 16:05:44,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 16:05:44,332 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 30 [2021-05-03 16:05:44,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:44,369 INFO L225 Difference]: With dead ends: 11507 [2021-05-03 16:05:44,370 INFO L226 Difference]: Without dead ends: 11482 [2021-05-03 16:05:44,370 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 670.9ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:05:44,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11482 states. [2021-05-03 16:05:44,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11482 to 10869. [2021-05-03 16:05:44,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10869 states, 10868 states have (on average 3.5813397129186604) internal successors, (38922), 10868 states have internal predecessors, (38922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:44,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10869 states to 10869 states and 38922 transitions. [2021-05-03 16:05:44,633 INFO L78 Accepts]: Start accepts. Automaton has 10869 states and 38922 transitions. Word has length 30 [2021-05-03 16:05:44,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:44,633 INFO L480 AbstractCegarLoop]: Abstraction has 10869 states and 38922 transitions. [2021-05-03 16:05:44,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2021-05-03 16:05:44,633 INFO L276 IsEmpty]: Start isEmpty. Operand 10869 states and 38922 transitions. [2021-05-03 16:05:44,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:05:44,659 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:44,659 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:44,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-05-03 16:05:44,860 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:44,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:44,861 INFO L82 PathProgramCache]: Analyzing trace with hash -75764163, now seen corresponding path program 42 times [2021-05-03 16:05:44,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:44,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689696925] [2021-05-03 16:05:44,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:44,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:45,214 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:45,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689696925] [2021-05-03 16:05:45,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105615373] [2021-05-03 16:05:45,214 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:45,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 16:05:45,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:45,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 16:05:45,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:45,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-05-03 16:05:45,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:45,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:45,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:45,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-05-03 16:05:45,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:45,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:05:45,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:45,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:45,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:45,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-05-03 16:05:45,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:45,521 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 41 treesize of output 29 [2021-05-03 16:05:45,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:45,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:45,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:45,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:30 [2021-05-03 16:05:45,621 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 25 treesize of output 17 [2021-05-03 16:05:45,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:45,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:45,635 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 20 treesize of output 12 [2021-05-03 16:05:45,637 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:45,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:45,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:45,642 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:5 [2021-05-03 16:05:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:45,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:45,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-03 16:05:45,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820983703] [2021-05-03 16:05:45,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:05:45,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:45,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:05:45,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:05:45,677 INFO L87 Difference]: Start difference. First operand 10869 states and 38922 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:46,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:46,201 INFO L93 Difference]: Finished difference Result 12035 states and 42730 transitions. [2021-05-03 16:05:46,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 16:05:46,203 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:05:46,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:46,242 INFO L225 Difference]: With dead ends: 12035 [2021-05-03 16:05:46,242 INFO L226 Difference]: Without dead ends: 12002 [2021-05-03 16:05:46,242 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 443.1ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:05:46,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12002 states. [2021-05-03 16:05:46,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12002 to 10946. [2021-05-03 16:05:46,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10946 states, 10945 states have (on average 3.5811786203746) internal successors, (39196), 10945 states have internal predecessors, (39196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:46,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10946 states to 10946 states and 39196 transitions. [2021-05-03 16:05:46,520 INFO L78 Accepts]: Start accepts. Automaton has 10946 states and 39196 transitions. Word has length 30 [2021-05-03 16:05:46,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:46,520 INFO L480 AbstractCegarLoop]: Abstraction has 10946 states and 39196 transitions. [2021-05-03 16:05:46,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:46,520 INFO L276 IsEmpty]: Start isEmpty. Operand 10946 states and 39196 transitions. [2021-05-03 16:05:46,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:05:46,548 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:46,548 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:46,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-05-03 16:05:46,749 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:46,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:46,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1496215775, now seen corresponding path program 43 times [2021-05-03 16:05:46,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:46,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005817231] [2021-05-03 16:05:46,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:46,932 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:46,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005817231] [2021-05-03 16:05:46,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894409298] [2021-05-03 16:05:46,932 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 [2021-05-03 16:05:46,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:46,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 16:05:46,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:47,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:05:47,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:47,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:47,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:47,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-05-03 16:05:47,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:47,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:05:47,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:47,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:47,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:47,090 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-05-03 16:05:47,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:47,226 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 43 treesize of output 31 [2021-05-03 16:05:47,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:47,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:47,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:47,241 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:48 [2021-05-03 16:05:47,292 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 25 treesize of output 17 [2021-05-03 16:05:47,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:47,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:47,302 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 24 treesize of output 16 [2021-05-03 16:05:47,304 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:47,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:47,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:47,308 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:5 [2021-05-03 16:05:47,335 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:47,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:47,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-03 16:05:47,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908854742] [2021-05-03 16:05:47,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:05:47,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:47,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:05:47,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:05:47,336 INFO L87 Difference]: Start difference. First operand 10946 states and 39196 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:47,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:47,741 INFO L93 Difference]: Finished difference Result 11961 states and 42504 transitions. [2021-05-03 16:05:47,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 16:05:47,743 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:05:47,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:47,781 INFO L225 Difference]: With dead ends: 11961 [2021-05-03 16:05:47,781 INFO L226 Difference]: Without dead ends: 11918 [2021-05-03 16:05:47,781 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 341.4ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:05:47,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11918 states. [2021-05-03 16:05:47,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11918 to 11015. [2021-05-03 16:05:48,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11015 states, 11014 states have (on average 3.5818957690212456) internal successors, (39451), 11014 states have internal predecessors, (39451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:48,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11015 states to 11015 states and 39451 transitions. [2021-05-03 16:05:48,049 INFO L78 Accepts]: Start accepts. Automaton has 11015 states and 39451 transitions. Word has length 30 [2021-05-03 16:05:48,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:48,049 INFO L480 AbstractCegarLoop]: Abstraction has 11015 states and 39451 transitions. [2021-05-03 16:05:48,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:48,049 INFO L276 IsEmpty]: Start isEmpty. Operand 11015 states and 39451 transitions. [2021-05-03 16:05:48,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:05:48,075 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:48,075 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:48,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-05-03 16:05:48,276 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:48,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:48,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1778933477, now seen corresponding path program 44 times [2021-05-03 16:05:48,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:48,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211216556] [2021-05-03 16:05:48,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:48,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:48,476 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:48,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211216556] [2021-05-03 16:05:48,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017095849] [2021-05-03 16:05:48,476 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 [2021-05-03 16:05:48,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:05:48,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:48,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 16:05:48,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:48,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-05-03 16:05:48,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:48,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:48,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:48,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-05-03 16:05:48,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:48,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:05:48,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:48,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:48,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:48,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-05-03 16:05:48,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:48,840 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 43 treesize of output 31 [2021-05-03 16:05:48,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:48,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:48,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:48,863 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 40 treesize of output 28 [2021-05-03 16:05:48,865 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:48,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:48,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:48,876 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:71, output treesize:32 [2021-05-03 16:05:48,918 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 [2021-05-03 16:05:48,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:48,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:48,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:48,925 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:5 [2021-05-03 16:05:49,164 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:49,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:49,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-03 16:05:49,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450823710] [2021-05-03 16:05:49,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:05:49,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:49,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:05:49,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:05:49,165 INFO L87 Difference]: Start difference. First operand 11015 states and 39451 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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) [2021-05-03 16:05:49,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:49,868 INFO L93 Difference]: Finished difference Result 11914 states and 42340 transitions. [2021-05-03 16:05:49,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 16:05:49,870 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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 30 [2021-05-03 16:05:49,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:49,907 INFO L225 Difference]: With dead ends: 11914 [2021-05-03 16:05:49,907 INFO L226 Difference]: Without dead ends: 11881 [2021-05-03 16:05:49,907 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 604.6ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:05:49,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11881 states. [2021-05-03 16:05:50,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11881 to 11039. [2021-05-03 16:05:50,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11039 states, 11038 states have (on average 3.5844355861569124) internal successors, (39565), 11038 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) [2021-05-03 16:05:50,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11039 states to 11039 states and 39565 transitions. [2021-05-03 16:05:50,206 INFO L78 Accepts]: Start accepts. Automaton has 11039 states and 39565 transitions. Word has length 30 [2021-05-03 16:05:50,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:50,207 INFO L480 AbstractCegarLoop]: Abstraction has 11039 states and 39565 transitions. [2021-05-03 16:05:50,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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) [2021-05-03 16:05:50,207 INFO L276 IsEmpty]: Start isEmpty. Operand 11039 states and 39565 transitions. [2021-05-03 16:05:50,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:05:50,234 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:50,234 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:50,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-05-03 16:05:50,435 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:50,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:50,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1731377819, now seen corresponding path program 45 times [2021-05-03 16:05:50,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:50,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279684381] [2021-05-03 16:05:50,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:50,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:50,617 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:50,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279684381] [2021-05-03 16:05:50,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580809040] [2021-05-03 16:05:50,617 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 [2021-05-03 16:05:50,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 16:05:50,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:50,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 16:05:50,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:50,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:05:50,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:50,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:50,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:50,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-05-03 16:05:50,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:50,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:05:50,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:50,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:50,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:50,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:49 [2021-05-03 16:05:51,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:51,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 40 [2021-05-03 16:05:51,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:51,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:51,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:51,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:129 [2021-05-03 16:05:51,436 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 25 treesize of output 17 [2021-05-03 16:05:51,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:51,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:51,448 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 20 treesize of output 12 [2021-05-03 16:05:51,450 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:51,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:51,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:51,453 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-05-03 16:05:51,485 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:51,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:51,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2021-05-03 16:05:51,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291614475] [2021-05-03 16:05:51,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:05:51,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:51,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:05:51,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:05:51,487 INFO L87 Difference]: Start difference. First operand 11039 states and 39565 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:52,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:52,945 INFO L93 Difference]: Finished difference Result 11784 states and 41867 transitions. [2021-05-03 16:05:52,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 16:05:52,947 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:05:52,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:52,987 INFO L225 Difference]: With dead ends: 11784 [2021-05-03 16:05:52,988 INFO L226 Difference]: Without dead ends: 11751 [2021-05-03 16:05:52,988 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1036.8ms TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-05-03 16:05:53,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11751 states. [2021-05-03 16:05:53,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11751 to 11098. [2021-05-03 16:05:53,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11098 states, 11097 states have (on average 3.58304046138596) internal successors, (39761), 11097 states have internal predecessors, (39761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:53,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11098 states to 11098 states and 39761 transitions. [2021-05-03 16:05:53,330 INFO L78 Accepts]: Start accepts. Automaton has 11098 states and 39761 transitions. Word has length 30 [2021-05-03 16:05:53,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:53,330 INFO L480 AbstractCegarLoop]: Abstraction has 11098 states and 39761 transitions. [2021-05-03 16:05:53,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:53,330 INFO L276 IsEmpty]: Start isEmpty. Operand 11098 states and 39761 transitions. [2021-05-03 16:05:53,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:05:53,354 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:53,354 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:53,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:53,555 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:53,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:53,555 INFO L82 PathProgramCache]: Analyzing trace with hash 711559775, now seen corresponding path program 46 times [2021-05-03 16:05:53,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:53,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180113312] [2021-05-03 16:05:53,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:53,744 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:53,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180113312] [2021-05-03 16:05:53,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526274718] [2021-05-03 16:05:53,745 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 [2021-05-03 16:05:53,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:05:53,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:53,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 16:05:53,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:53,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-05-03 16:05:53,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:53,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:53,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:53,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-05-03 16:05:53,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:53,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:05:53,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:53,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:53,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:53,917 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-05-03 16:05:54,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:54,057 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 43 treesize of output 31 [2021-05-03 16:05:54,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:54,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:54,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:54,074 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 40 treesize of output 28 [2021-05-03 16:05:54,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:54,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:54,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:54,084 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:71, output treesize:32 [2021-05-03 16:05:54,116 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 [2021-05-03 16:05:54,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:54,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:54,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:54,120 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:5 [2021-05-03 16:05:54,148 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:54,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:54,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-03 16:05:54,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671307088] [2021-05-03 16:05:54,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:05:54,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:54,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:05:54,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:05:54,150 INFO L87 Difference]: Start difference. First operand 11098 states and 39761 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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) [2021-05-03 16:05:54,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:54,722 INFO L93 Difference]: Finished difference Result 11789 states and 41953 transitions. [2021-05-03 16:05:54,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 16:05:54,723 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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 30 [2021-05-03 16:05:54,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:54,765 INFO L225 Difference]: With dead ends: 11789 [2021-05-03 16:05:54,766 INFO L226 Difference]: Without dead ends: 11707 [2021-05-03 16:05:54,766 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 346.5ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:05:54,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11707 states. [2021-05-03 16:05:54,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11707 to 11144. [2021-05-03 16:05:54,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11144 states, 11143 states have (on average 3.5822489455263393) internal successors, (39917), 11143 states have internal predecessors, (39917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:55,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 39917 transitions. [2021-05-03 16:05:55,041 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 39917 transitions. Word has length 30 [2021-05-03 16:05:55,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:55,041 INFO L480 AbstractCegarLoop]: Abstraction has 11144 states and 39917 transitions. [2021-05-03 16:05:55,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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) [2021-05-03 16:05:55,041 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 39917 transitions. [2021-05-03 16:05:55,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 16:05:55,067 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:55,067 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:55,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-05-03 16:05:55,268 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:55,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:55,268 INFO L82 PathProgramCache]: Analyzing trace with hash -11649061, now seen corresponding path program 47 times [2021-05-03 16:05:55,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:55,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199011066] [2021-05-03 16:05:55,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:55,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:55,451 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:55,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199011066] [2021-05-03 16:05:55,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331001355] [2021-05-03 16:05:55,452 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 [2021-05-03 16:05:55,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 16:05:55,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:55,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-03 16:05:55,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:55,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-05-03 16:05:55,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:55,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:55,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:55,585 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-05-03 16:05:55,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:55,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:05:55,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:55,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:55,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:55,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:51 [2021-05-03 16:05:55,862 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 32 treesize of output 24 [2021-05-03 16:05:55,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:55,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:55,880 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 27 treesize of output 19 [2021-05-03 16:05:55,881 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:55,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:55,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:55,891 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:50, output treesize:21 [2021-05-03 16:05:56,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:56,074 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:56,074 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 [2021-05-03 16:05:56,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:05:56,175 INFO L628 ElimStorePlain]: treesize reduction 43, result has 50.0 percent of original size [2021-05-03 16:05:56,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:56,193 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:33 [2021-05-03 16:05:56,278 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:56,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:56,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-05-03 16:05:56,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255087160] [2021-05-03 16:05:56,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:05:56,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:56,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:05:56,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:05:56,280 INFO L87 Difference]: Start difference. First operand 11144 states and 39917 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:57,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:57,820 INFO L93 Difference]: Finished difference Result 12527 states and 44218 transitions. [2021-05-03 16:05:57,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 16:05:57,821 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 16:05:57,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:57,865 INFO L225 Difference]: With dead ends: 12527 [2021-05-03 16:05:57,865 INFO L226 Difference]: Without dead ends: 12494 [2021-05-03 16:05:57,865 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 931.9ms TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:05:57,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12494 states. [2021-05-03 16:05:58,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12494 to 11145. [2021-05-03 16:05:58,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11145 states, 11144 states have (on average 3.5860552763819094) internal successors, (39963), 11144 states have internal predecessors, (39963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:58,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11145 states to 11145 states and 39963 transitions. [2021-05-03 16:05:58,141 INFO L78 Accepts]: Start accepts. Automaton has 11145 states and 39963 transitions. Word has length 30 [2021-05-03 16:05:58,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:58,141 INFO L480 AbstractCegarLoop]: Abstraction has 11145 states and 39963 transitions. [2021-05-03 16:05:58,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:58,142 INFO L276 IsEmpty]: Start isEmpty. Operand 11145 states and 39963 transitions. [2021-05-03 16:05:58,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:05:58,166 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:58,166 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:58,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-05-03 16:05:58,366 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:58,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:58,367 INFO L82 PathProgramCache]: Analyzing trace with hash -433229065, now seen corresponding path program 48 times [2021-05-03 16:05:58,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:58,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739281834] [2021-05-03 16:05:58,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:58,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:58,419 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:05:58,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739281834] [2021-05-03 16:05:58,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110354456] [2021-05-03 16:05:58,419 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 [2021-05-03 16:05:58,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:05:58,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:58,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:05:58,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:58,532 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:05:58,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:58,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 16:05:58,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82738404] [2021-05-03 16:05:58,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 16:05:58,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:58,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 16:05:58,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:05:58,534 INFO L87 Difference]: Start difference. First operand 11145 states and 39963 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:58,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:58,904 INFO L93 Difference]: Finished difference Result 24681 states and 86911 transitions. [2021-05-03 16:05:58,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 16:05:58,905 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 16:05:58,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:59,088 INFO L225 Difference]: With dead ends: 24681 [2021-05-03 16:05:59,088 INFO L226 Difference]: Without dead ends: 24330 [2021-05-03 16:05:59,088 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:05:59,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24330 states. [2021-05-03 16:05:59,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24330 to 14913. [2021-05-03 16:05:59,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14913 states, 14912 states have (on average 3.6058878755364807) internal successors, (53771), 14912 states have internal predecessors, (53771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:59,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14913 states to 14913 states and 53771 transitions. [2021-05-03 16:05:59,545 INFO L78 Accepts]: Start accepts. Automaton has 14913 states and 53771 transitions. Word has length 32 [2021-05-03 16:05:59,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:59,545 INFO L480 AbstractCegarLoop]: Abstraction has 14913 states and 53771 transitions. [2021-05-03 16:05:59,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:59,545 INFO L276 IsEmpty]: Start isEmpty. Operand 14913 states and 53771 transitions. [2021-05-03 16:05:59,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:05:59,582 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:59,582 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:59,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-05-03 16:05:59,783 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:59,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:59,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1664521631, now seen corresponding path program 49 times [2021-05-03 16:05:59,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:59,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504438785] [2021-05-03 16:05:59,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:59,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:59,836 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 16:05:59,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504438785] [2021-05-03 16:05:59,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896326732] [2021-05-03 16:05:59,837 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 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 [2021-05-03 16:05:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:59,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:05:59,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:06:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:06:00,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:06:00,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-05-03 16:06:00,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174535644] [2021-05-03 16:06:00,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 16:06:00,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:06:00,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 16:06:00,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-03 16:06:00,006 INFO L87 Difference]: Start difference. First operand 14913 states and 53771 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:06:02,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:06:02,678 INFO L93 Difference]: Finished difference Result 63428 states and 222186 transitions. [2021-05-03 16:06:02,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-03 16:06:02,679 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 16:06:02,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:06:02,976 INFO L225 Difference]: With dead ends: 63428 [2021-05-03 16:06:02,977 INFO L226 Difference]: Without dead ends: 61736 [2021-05-03 16:06:02,978 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2558 ImplicationChecksByTransitivity, 1429.4ms TimeCoverageRelationStatistics Valid=1710, Invalid=5430, Unknown=0, NotChecked=0, Total=7140 [2021-05-03 16:06:03,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61736 states. [2021-05-03 16:06:04,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61736 to 31533. [2021-05-03 16:06:04,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31533 states, 31532 states have (on average 3.6678612203475836) internal successors, (115655), 31532 states have internal predecessors, (115655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:06:04,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31533 states to 31533 states and 115655 transitions. [2021-05-03 16:06:04,525 INFO L78 Accepts]: Start accepts. Automaton has 31533 states and 115655 transitions. Word has length 32 [2021-05-03 16:06:04,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:06:04,525 INFO L480 AbstractCegarLoop]: Abstraction has 31533 states and 115655 transitions. [2021-05-03 16:06:04,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:06:04,525 INFO L276 IsEmpty]: Start isEmpty. Operand 31533 states and 115655 transitions. [2021-05-03 16:06:04,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:06:04,616 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:06:04,616 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:06:04,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-05-03 16:06:04,817 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:06:04,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:06:04,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1162824845, now seen corresponding path program 50 times [2021-05-03 16:06:04,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:06:04,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881889237] [2021-05-03 16:06:04,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:06:04,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:06:04,858 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:06:04,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881889237] [2021-05-03 16:06:04,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359215258] [2021-05-03 16:06:04,858 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 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 [2021-05-03 16:06:05,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:06:05,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:06:05,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:06:05,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:06:05,192 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:06:05,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:06:05,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-05-03 16:06:05,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629706164] [2021-05-03 16:06:05,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 16:06:05,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:06:05,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 16:06:05,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-03 16:06:05,193 INFO L87 Difference]: Start difference. First operand 31533 states and 115655 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:06:06,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:06:06,625 INFO L93 Difference]: Finished difference Result 53244 states and 184508 transitions. [2021-05-03 16:06:06,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 16:06:06,638 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 16:06:06,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:06:06,950 INFO L225 Difference]: With dead ends: 53244 [2021-05-03 16:06:06,950 INFO L226 Difference]: Without dead ends: 52760 [2021-05-03 16:06:06,950 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 324.3ms TimeCoverageRelationStatistics Valid=309, Invalid=881, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 16:06:07,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52760 states. [2021-05-03 16:06:08,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52760 to 36994. [2021-05-03 16:06:08,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36994 states, 36993 states have (on average 3.7014029681291056) internal successors, (136926), 36993 states have internal predecessors, (136926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:06:08,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36994 states to 36994 states and 136926 transitions. [2021-05-03 16:06:08,730 INFO L78 Accepts]: Start accepts. Automaton has 36994 states and 136926 transitions. Word has length 32 [2021-05-03 16:06:08,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:06:08,730 INFO L480 AbstractCegarLoop]: Abstraction has 36994 states and 136926 transitions. [2021-05-03 16:06:08,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:06:08,730 INFO L276 IsEmpty]: Start isEmpty. Operand 36994 states and 136926 transitions. [2021-05-03 16:06:08,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:06:08,829 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:06:08,829 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:06:09,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-05-03 16:06:09,030 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:06:09,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:06:09,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1445762697, now seen corresponding path program 51 times [2021-05-03 16:06:09,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:06:09,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511060376] [2021-05-03 16:06:09,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:06:09,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:06:09,118 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:06:09,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511060376] [2021-05-03 16:06:09,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226699847] [2021-05-03 16:06:09,119 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 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 [2021-05-03 16:06:09,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 16:06:09,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:06:09,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:06:09,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:06:09,300 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:06:09,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:06:09,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 13 [2021-05-03 16:06:09,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610508513] [2021-05-03 16:06:09,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 16:06:09,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:06:09,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 16:06:09,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-03 16:06:09,302 INFO L87 Difference]: Start difference. First operand 36994 states and 136926 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:06:12,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:06:12,306 INFO L93 Difference]: Finished difference Result 88819 states and 308732 transitions. [2021-05-03 16:06:12,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-03 16:06:12,308 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 16:06:12,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:06:12,745 INFO L225 Difference]: With dead ends: 88819 [2021-05-03 16:06:12,746 INFO L226 Difference]: Without dead ends: 87899 [2021-05-03 16:06:12,746 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2470 ImplicationChecksByTransitivity, 1404.2ms TimeCoverageRelationStatistics Valid=1502, Invalid=4818, Unknown=0, NotChecked=0, Total=6320 [2021-05-03 16:06:13,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87899 states. [2021-05-03 16:06:14,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87899 to 49755. [2021-05-03 16:06:14,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49755 states, 49754 states have (on average 3.7058929935281584) internal successors, (184383), 49754 states have internal predecessors, (184383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:06:15,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49755 states to 49755 states and 184383 transitions. [2021-05-03 16:06:15,478 INFO L78 Accepts]: Start accepts. Automaton has 49755 states and 184383 transitions. Word has length 32 [2021-05-03 16:06:15,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:06:15,478 INFO L480 AbstractCegarLoop]: Abstraction has 49755 states and 184383 transitions. [2021-05-03 16:06:15,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:06:15,478 INFO L276 IsEmpty]: Start isEmpty. Operand 49755 states and 184383 transitions. [2021-05-03 16:06:15,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:06:15,550 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:06:15,550 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:06:15,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-05-03 16:06:15,750 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:06:15,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:06:15,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1584127903, now seen corresponding path program 52 times [2021-05-03 16:06:15,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:06:15,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155150764] [2021-05-03 16:06:15,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:06:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:06:15,807 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:06:15,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155150764] [2021-05-03 16:06:15,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916458986] [2021-05-03 16:06:15,808 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 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 [2021-05-03 16:06:15,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:06:15,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:06:15,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:06:15,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:06:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:06:15,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:06:15,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-03 16:06:15,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615956961] [2021-05-03 16:06:15,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:06:15,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:06:15,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:06:15,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:06:15,933 INFO L87 Difference]: Start difference. First operand 49755 states and 184383 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:06:18,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:06:18,233 INFO L93 Difference]: Finished difference Result 110750 states and 395824 transitions. [2021-05-03 16:06:18,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 16:06:18,235 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 16:06:18,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:06:19,205 INFO L225 Difference]: With dead ends: 110750 [2021-05-03 16:06:19,205 INFO L226 Difference]: Without dead ends: 109916 [2021-05-03 16:06:19,206 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 534.3ms TimeCoverageRelationStatistics Valid=459, Invalid=1433, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 16:06:19,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109916 states. [2021-05-03 16:06:22,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109916 to 72104. [2021-05-03 16:06:22,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72104 states, 72103 states have (on average 3.7628115335006864) internal successors, (271310), 72103 states have internal predecessors, (271310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:06:23,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72104 states to 72104 states and 271310 transitions. [2021-05-03 16:06:23,234 INFO L78 Accepts]: Start accepts. Automaton has 72104 states and 271310 transitions. Word has length 32 [2021-05-03 16:06:23,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:06:23,234 INFO L480 AbstractCegarLoop]: Abstraction has 72104 states and 271310 transitions. [2021-05-03 16:06:23,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:06:23,234 INFO L276 IsEmpty]: Start isEmpty. Operand 72104 states and 271310 transitions. [2021-05-03 16:06:23,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:06:23,429 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:06:23,429 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:06:23,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-05-03 16:06:23,630 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:06:23,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:06:23,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1338853791, now seen corresponding path program 53 times [2021-05-03 16:06:23,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:06:23,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982176298] [2021-05-03 16:06:23,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:06:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:06:23,709 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:06:23,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982176298] [2021-05-03 16:06:23,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425502671] [2021-05-03 16:06:23,709 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 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 [2021-05-03 16:06:23,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 16:06:23,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:06:23,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:06:23,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:06:23,881 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:06:23,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:06:23,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-03 16:06:23,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461936554] [2021-05-03 16:06:23,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:06:23,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:06:23,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:06:23,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:06:23,883 INFO L87 Difference]: Start difference. First operand 72104 states and 271310 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:06:27,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:06:27,186 INFO L93 Difference]: Finished difference Result 117439 states and 415020 transitions. [2021-05-03 16:06:27,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-03 16:06:27,192 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 16:06:27,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:06:27,716 INFO L225 Difference]: With dead ends: 117439 [2021-05-03 16:06:27,716 INFO L226 Difference]: Without dead ends: 117354 [2021-05-03 16:06:27,717 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2147 ImplicationChecksByTransitivity, 1274.3ms TimeCoverageRelationStatistics Valid=1091, Invalid=4609, Unknown=0, NotChecked=0, Total=5700 [2021-05-03 16:06:27,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117354 states. [2021-05-03 16:06:30,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117354 to 64655. [2021-05-03 16:06:31,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64655 states, 64654 states have (on average 3.720883472020293) internal successors, (240570), 64654 states have internal predecessors, (240570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:06:31,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64655 states to 64655 states and 240570 transitions. [2021-05-03 16:06:31,852 INFO L78 Accepts]: Start accepts. Automaton has 64655 states and 240570 transitions. Word has length 32 [2021-05-03 16:06:31,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:06:31,853 INFO L480 AbstractCegarLoop]: Abstraction has 64655 states and 240570 transitions. [2021-05-03 16:06:31,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:06:31,853 INFO L276 IsEmpty]: Start isEmpty. Operand 64655 states and 240570 transitions. [2021-05-03 16:06:32,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:06:32,008 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:06:32,008 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:06:32,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:06:32,209 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:06:32,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:06:32,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1376772171, now seen corresponding path program 54 times [2021-05-03 16:06:32,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:06:32,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036295747] [2021-05-03 16:06:32,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:06:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:06:32,251 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:06:32,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036295747] [2021-05-03 16:06:32,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827688967] [2021-05-03 16:06:32,252 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 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 [2021-05-03 16:06:32,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 16:06:32,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:06:32,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:06:32,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:06:32,335 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:06:32,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:06:32,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-03 16:06:32,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833904377] [2021-05-03 16:06:32,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 16:06:32,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:06:32,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 16:06:32,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-03 16:06:32,336 INFO L87 Difference]: Start difference. First operand 64655 states and 240570 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:06:32,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:06:32,933 INFO L93 Difference]: Finished difference Result 81752 states and 297778 transitions. [2021-05-03 16:06:32,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 16:06:32,934 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 16:06:32,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:06:33,191 INFO L225 Difference]: With dead ends: 81752 [2021-05-03 16:06:33,192 INFO L226 Difference]: Without dead ends: 81659 [2021-05-03 16:06:33,192 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:06:33,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81659 states. [2021-05-03 16:06:35,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81659 to 64327. [2021-05-03 16:06:35,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64327 states, 64326 states have (on average 3.721512296738488) internal successors, (239390), 64326 states have internal predecessors, (239390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:06:35,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64327 states to 64327 states and 239390 transitions. [2021-05-03 16:06:35,657 INFO L78 Accepts]: Start accepts. Automaton has 64327 states and 239390 transitions. Word has length 32 [2021-05-03 16:06:35,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:06:35,657 INFO L480 AbstractCegarLoop]: Abstraction has 64327 states and 239390 transitions. [2021-05-03 16:06:35,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:06:35,658 INFO L276 IsEmpty]: Start isEmpty. Operand 64327 states and 239390 transitions. [2021-05-03 16:06:35,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:06:35,745 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:06:35,745 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:06:35,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-05-03 16:06:35,946 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:06:35,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:06:35,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1382004005, now seen corresponding path program 55 times [2021-05-03 16:06:35,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:06:35,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356702127] [2021-05-03 16:06:35,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:06:35,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:06:35,987 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:06:35,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356702127] [2021-05-03 16:06:35,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947012887] [2021-05-03 16:06:35,987 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 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 [2021-05-03 16:06:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:06:36,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:06:36,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:06:36,091 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:06:36,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:06:36,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 16:06:36,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417186660] [2021-05-03 16:06:36,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 16:06:36,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:06:36,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 16:06:36,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:06:36,092 INFO L87 Difference]: Start difference. First operand 64327 states and 239390 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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) [2021-05-03 16:06:37,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:06:37,151 INFO L93 Difference]: Finished difference Result 87990 states and 324754 transitions. [2021-05-03 16:06:37,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 16:06:37,161 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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 32 [2021-05-03 16:06:37,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:06:37,569 INFO L225 Difference]: With dead ends: 87990 [2021-05-03 16:06:37,569 INFO L226 Difference]: Without dead ends: 87904 [2021-05-03 16:06:37,569 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-05-03 16:06:37,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87904 states. [2021-05-03 16:06:39,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87904 to 81353. [2021-05-03 16:06:40,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81353 states, 81352 states have (on average 3.751069426688957) internal successors, (305157), 81352 states have internal predecessors, (305157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:06:40,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81353 states to 81353 states and 305157 transitions. [2021-05-03 16:06:40,333 INFO L78 Accepts]: Start accepts. Automaton has 81353 states and 305157 transitions. Word has length 32 [2021-05-03 16:06:40,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:06:40,333 INFO L480 AbstractCegarLoop]: Abstraction has 81353 states and 305157 transitions. [2021-05-03 16:06:40,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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) [2021-05-03 16:06:40,333 INFO L276 IsEmpty]: Start isEmpty. Operand 81353 states and 305157 transitions. [2021-05-03 16:06:40,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:06:40,458 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:06:40,458 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:06:40,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:06:40,659 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:06:40,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:06:40,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1131533221, now seen corresponding path program 56 times [2021-05-03 16:06:40,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:06:40,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875793956] [2021-05-03 16:06:40,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:06:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:06:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:06:40,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875793956] [2021-05-03 16:06:40,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386513835] [2021-05-03 16:06:40,693 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 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 [2021-05-03 16:06:40,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:06:40,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:06:40,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:06:40,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:06:40,771 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:06:40,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:06:40,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 16:06:40,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513604996] [2021-05-03 16:06:40,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 16:06:40,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:06:40,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 16:06:40,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:06:40,772 INFO L87 Difference]: Start difference. First operand 81353 states and 305157 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 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) [2021-05-03 16:06:42,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:06:42,091 INFO L93 Difference]: Finished difference Result 114475 states and 423363 transitions. [2021-05-03 16:06:42,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 16:06:42,092 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 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 32 [2021-05-03 16:06:42,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:06:42,591 INFO L225 Difference]: With dead ends: 114475 [2021-05-03 16:06:42,591 INFO L226 Difference]: Without dead ends: 114263 [2021-05-03 16:06:42,592 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 62.1ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-05-03 16:06:42,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114263 states. [2021-05-03 16:06:45,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114263 to 105184. [2021-05-03 16:06:45,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105184 states, 105183 states have (on average 3.763364802296949) internal successors, (395842), 105183 states have internal predecessors, (395842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:06:45,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105184 states to 105184 states and 395842 transitions. [2021-05-03 16:06:45,741 INFO L78 Accepts]: Start accepts. Automaton has 105184 states and 395842 transitions. Word has length 32 [2021-05-03 16:06:45,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:06:45,741 INFO L480 AbstractCegarLoop]: Abstraction has 105184 states and 395842 transitions. [2021-05-03 16:06:45,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 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) [2021-05-03 16:06:45,741 INFO L276 IsEmpty]: Start isEmpty. Operand 105184 states and 395842 transitions. [2021-05-03 16:06:45,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:06:45,901 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:06:45,901 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:06:46,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable141 [2021-05-03 16:06:46,101 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:06:46,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:06:46,102 INFO L82 PathProgramCache]: Analyzing trace with hash 991552283, now seen corresponding path program 57 times [2021-05-03 16:06:46,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:06:46,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848674701] [2021-05-03 16:06:46,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:06:46,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:06:46,160 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:06:46,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848674701] [2021-05-03 16:06:46,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471969465] [2021-05-03 16:06:46,160 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 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 [2021-05-03 16:06:46,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 16:06:46,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:06:46,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:06:46,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:06:46,279 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:06:46,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:06:46,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 7 [2021-05-03 16:06:46,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477281196] [2021-05-03 16:06:46,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 16:06:46,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:06:46,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 16:06:46,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-03 16:06:46,281 INFO L87 Difference]: Start difference. First operand 105184 states and 395842 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 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) [2021-05-03 16:06:47,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:06:47,787 INFO L93 Difference]: Finished difference Result 114700 states and 425547 transitions. [2021-05-03 16:06:47,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 16:06:47,788 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 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 32 [2021-05-03 16:06:47,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:06:48,244 INFO L225 Difference]: With dead ends: 114700 [2021-05-03 16:06:48,244 INFO L226 Difference]: Without dead ends: 114682 [2021-05-03 16:06:48,245 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 154.5ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:06:48,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114682 states. [2021-05-03 16:06:51,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114682 to 105369. [2021-05-03 16:06:51,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105369 states, 105368 states have (on average 3.755941082681649) internal successors, (395756), 105368 states have internal predecessors, (395756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:06:52,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105369 states to 105369 states and 395756 transitions. [2021-05-03 16:06:52,194 INFO L78 Accepts]: Start accepts. Automaton has 105369 states and 395756 transitions. Word has length 32 [2021-05-03 16:06:52,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:06:52,194 INFO L480 AbstractCegarLoop]: Abstraction has 105369 states and 395756 transitions. [2021-05-03 16:06:52,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 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) [2021-05-03 16:06:52,195 INFO L276 IsEmpty]: Start isEmpty. Operand 105369 states and 395756 transitions. [2021-05-03 16:06:52,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 16:06:52,450 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:06:52,450 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:06:52,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:06:52,651 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:06:52,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:06:52,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1602509483, now seen corresponding path program 58 times [2021-05-03 16:06:52,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:06:52,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623976746] [2021-05-03 16:06:52,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:06:52,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:06:52,693 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 16:06:52,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623976746] [2021-05-03 16:06:52,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668150242] [2021-05-03 16:06:52,693 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 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 [2021-05-03 16:06:52,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:06:52,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:06:52,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:06:52,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:06:52,781 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 16:06:52,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:06:52,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 16:06:52,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389072731] [2021-05-03 16:06:52,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 16:06:52,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:06:52,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 16:06:52,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:06:52,782 INFO L87 Difference]: Start difference. First operand 105369 states and 395756 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:06:53,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:06:53,981 INFO L93 Difference]: Finished difference Result 162575 states and 611725 transitions. [2021-05-03 16:06:53,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 16:06:53,982 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 33 [2021-05-03 16:06:53,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:06:55,380 INFO L225 Difference]: With dead ends: 162575 [2021-05-03 16:06:55,380 INFO L226 Difference]: Without dead ends: 160873 [2021-05-03 16:06:55,380 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-05-03 16:06:55,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160873 states. [2021-05-03 16:06:58,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160873 to 155997. [2021-05-03 16:06:59,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155997 states, 155996 states have (on average 3.742910074617298) internal successors, (583879), 155996 states have internal predecessors, (583879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:00,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155997 states to 155997 states and 583879 transitions. [2021-05-03 16:07:00,654 INFO L78 Accepts]: Start accepts. Automaton has 155997 states and 583879 transitions. Word has length 33 [2021-05-03 16:07:00,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:00,654 INFO L480 AbstractCegarLoop]: Abstraction has 155997 states and 583879 transitions. [2021-05-03 16:07:00,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:00,654 INFO L276 IsEmpty]: Start isEmpty. Operand 155997 states and 583879 transitions. [2021-05-03 16:07:00,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 16:07:00,894 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:00,894 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:01,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:01,095 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:01,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:01,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1963622161, now seen corresponding path program 59 times [2021-05-03 16:07:01,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:01,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198423124] [2021-05-03 16:07:01,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:01,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:01,133 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 16:07:01,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198423124] [2021-05-03 16:07:01,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724260439] [2021-05-03 16:07:01,134 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 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 [2021-05-03 16:07:01,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 16:07:01,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:07:01,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 16:07:01,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:01,299 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:07:01,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:01,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-03 16:07:01,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056965519] [2021-05-03 16:07:01,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:07:01,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:01,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:07:01,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:07:01,302 INFO L87 Difference]: Start difference. First operand 155997 states and 583879 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:03,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:03,968 INFO L93 Difference]: Finished difference Result 126178 states and 465872 transitions. [2021-05-03 16:07:03,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-03 16:07:03,969 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 16:07:03,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:04,484 INFO L225 Difference]: With dead ends: 126178 [2021-05-03 16:07:04,485 INFO L226 Difference]: Without dead ends: 125415 [2021-05-03 16:07:04,485 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1601 ImplicationChecksByTransitivity, 857.3ms TimeCoverageRelationStatistics Valid=1021, Invalid=3269, Unknown=0, NotChecked=0, Total=4290 [2021-05-03 16:07:04,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125415 states. [2021-05-03 16:07:07,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125415 to 98227. [2021-05-03 16:07:07,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98227 states, 98226 states have (on average 3.7583531855109644) internal successors, (369168), 98226 states have internal predecessors, (369168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:07,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98227 states to 98227 states and 369168 transitions. [2021-05-03 16:07:07,724 INFO L78 Accepts]: Start accepts. Automaton has 98227 states and 369168 transitions. Word has length 33 [2021-05-03 16:07:07,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:07,724 INFO L480 AbstractCegarLoop]: Abstraction has 98227 states and 369168 transitions. [2021-05-03 16:07:07,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:07,724 INFO L276 IsEmpty]: Start isEmpty. Operand 98227 states and 369168 transitions. [2021-05-03 16:07:07,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:07:07,875 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:07,875 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:08,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:08,076 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:08,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:08,077 INFO L82 PathProgramCache]: Analyzing trace with hash 815112445, now seen corresponding path program 60 times [2021-05-03 16:07:08,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:08,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215903874] [2021-05-03 16:07:08,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:08,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:08,110 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 16:07:08,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215903874] [2021-05-03 16:07:08,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134515247] [2021-05-03 16:07:08,110 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 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 [2021-05-03 16:07:08,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:07:08,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:07:08,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:07:08,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:08,197 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 16:07:08,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:08,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-03 16:07:08,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081083986] [2021-05-03 16:07:08,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 16:07:08,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:08,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 16:07:08,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 16:07:08,198 INFO L87 Difference]: Start difference. First operand 98227 states and 369168 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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) [2021-05-03 16:07:09,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:09,722 INFO L93 Difference]: Finished difference Result 116975 states and 430813 transitions. [2021-05-03 16:07:09,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 16:07:09,723 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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 34 [2021-05-03 16:07:09,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:10,241 INFO L225 Difference]: With dead ends: 116975 [2021-05-03 16:07:10,241 INFO L226 Difference]: Without dead ends: 116964 [2021-05-03 16:07:10,242 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:07:10,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116964 states. [2021-05-03 16:07:12,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116964 to 98029. [2021-05-03 16:07:13,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98029 states, 98028 states have (on average 3.7583547557840618) internal successors, (368424), 98028 states have internal predecessors, (368424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:13,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98029 states to 98029 states and 368424 transitions. [2021-05-03 16:07:13,519 INFO L78 Accepts]: Start accepts. Automaton has 98029 states and 368424 transitions. Word has length 34 [2021-05-03 16:07:13,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:13,519 INFO L480 AbstractCegarLoop]: Abstraction has 98029 states and 368424 transitions. [2021-05-03 16:07:13,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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) [2021-05-03 16:07:13,519 INFO L276 IsEmpty]: Start isEmpty. Operand 98029 states and 368424 transitions. [2021-05-03 16:07:13,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 16:07:13,683 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:13,683 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:13,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-05-03 16:07:13,884 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:13,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:13,884 INFO L82 PathProgramCache]: Analyzing trace with hash -415043557, now seen corresponding path program 61 times [2021-05-03 16:07:13,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:13,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499987130] [2021-05-03 16:07:13,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:13,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:13,921 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:07:13,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499987130] [2021-05-03 16:07:13,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000300547] [2021-05-03 16:07:13,922 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 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 [2021-05-03 16:07:13,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:13,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:07:13,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:07:14,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:14,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-03 16:07:14,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670351624] [2021-05-03 16:07:14,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 16:07:14,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:14,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 16:07:14,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-03 16:07:14,041 INFO L87 Difference]: Start difference. First operand 98029 states and 368424 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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) [2021-05-03 16:07:15,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:15,611 INFO L93 Difference]: Finished difference Result 112958 states and 418562 transitions. [2021-05-03 16:07:15,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 16:07:15,612 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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 35 [2021-05-03 16:07:15,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:16,103 INFO L225 Difference]: With dead ends: 112958 [2021-05-03 16:07:16,104 INFO L226 Difference]: Without dead ends: 112866 [2021-05-03 16:07:16,104 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:07:16,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112866 states. [2021-05-03 16:07:19,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112866 to 105925. [2021-05-03 16:07:19,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105925 states, 105924 states have (on average 3.7350364412220083) internal successors, (395630), 105924 states have internal predecessors, (395630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:19,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105925 states to 105925 states and 395630 transitions. [2021-05-03 16:07:19,636 INFO L78 Accepts]: Start accepts. Automaton has 105925 states and 395630 transitions. Word has length 35 [2021-05-03 16:07:19,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:19,636 INFO L480 AbstractCegarLoop]: Abstraction has 105925 states and 395630 transitions. [2021-05-03 16:07:19,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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) [2021-05-03 16:07:19,636 INFO L276 IsEmpty]: Start isEmpty. Operand 105925 states and 395630 transitions. [2021-05-03 16:07:19,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 16:07:19,782 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:19,783 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:19,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:19,992 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:19,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:19,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1766472195, now seen corresponding path program 62 times [2021-05-03 16:07:19,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:19,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162874821] [2021-05-03 16:07:19,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:20,022 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:07:20,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162874821] [2021-05-03 16:07:20,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662353899] [2021-05-03 16:07:20,023 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 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 [2021-05-03 16:07:20,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:07:20,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:07:20,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:07:20,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:20,103 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:07:20,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:20,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-03 16:07:20,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12014661] [2021-05-03 16:07:20,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 16:07:20,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:20,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 16:07:20,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-03 16:07:20,104 INFO L87 Difference]: Start difference. First operand 105925 states and 395630 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:21,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:21,499 INFO L93 Difference]: Finished difference Result 109518 states and 406229 transitions. [2021-05-03 16:07:21,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 16:07:21,500 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 16:07:21,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:21,955 INFO L225 Difference]: With dead ends: 109518 [2021-05-03 16:07:21,955 INFO L226 Difference]: Without dead ends: 109403 [2021-05-03 16:07:21,955 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 16:07:22,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109403 states. [2021-05-03 16:07:24,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109403 to 104854. [2021-05-03 16:07:24,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104854 states, 104853 states have (on average 3.7321965036765756) internal successors, (391332), 104853 states have internal predecessors, (391332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:25,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104854 states to 104854 states and 391332 transitions. [2021-05-03 16:07:25,318 INFO L78 Accepts]: Start accepts. Automaton has 104854 states and 391332 transitions. Word has length 35 [2021-05-03 16:07:25,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:25,318 INFO L480 AbstractCegarLoop]: Abstraction has 104854 states and 391332 transitions. [2021-05-03 16:07:25,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:25,318 INFO L276 IsEmpty]: Start isEmpty. Operand 104854 states and 391332 transitions. [2021-05-03 16:07:25,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 16:07:25,564 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:25,564 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:25,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-05-03 16:07:25,765 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:25,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:25,765 INFO L82 PathProgramCache]: Analyzing trace with hash 742728831, now seen corresponding path program 63 times [2021-05-03 16:07:25,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:25,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169431171] [2021-05-03 16:07:25,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:25,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:07:25,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169431171] [2021-05-03 16:07:25,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496635997] [2021-05-03 16:07:25,803 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 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 [2021-05-03 16:07:25,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:07:25,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:07:25,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:07:25,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:25,931 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:07:25,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:25,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-05-03 16:07:25,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422018362] [2021-05-03 16:07:25,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:07:25,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:25,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:07:25,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:07:25,933 INFO L87 Difference]: Start difference. First operand 104854 states and 391332 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:28,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:28,650 INFO L93 Difference]: Finished difference Result 122632 states and 446831 transitions. [2021-05-03 16:07:28,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-03 16:07:28,651 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 16:07:28,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:29,096 INFO L225 Difference]: With dead ends: 122632 [2021-05-03 16:07:29,096 INFO L226 Difference]: Without dead ends: 121947 [2021-05-03 16:07:29,097 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2293 ImplicationChecksByTransitivity, 843.0ms TimeCoverageRelationStatistics Valid=1270, Invalid=5210, Unknown=0, NotChecked=0, Total=6480 [2021-05-03 16:07:29,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121947 states. [2021-05-03 16:07:32,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121947 to 109419. [2021-05-03 16:07:32,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109419 states, 109418 states have (on average 3.72578551974995) internal successors, (407668), 109418 states have internal predecessors, (407668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:32,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109419 states to 109419 states and 407668 transitions. [2021-05-03 16:07:32,613 INFO L78 Accepts]: Start accepts. Automaton has 109419 states and 407668 transitions. Word has length 35 [2021-05-03 16:07:32,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:32,613 INFO L480 AbstractCegarLoop]: Abstraction has 109419 states and 407668 transitions. [2021-05-03 16:07:32,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:32,613 INFO L276 IsEmpty]: Start isEmpty. Operand 109419 states and 407668 transitions. [2021-05-03 16:07:32,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 16:07:32,744 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:32,744 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:32,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-05-03 16:07:32,957 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:32,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:32,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1005636645, now seen corresponding path program 64 times [2021-05-03 16:07:32,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:32,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785208031] [2021-05-03 16:07:32,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:32,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:32,992 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:07:32,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785208031] [2021-05-03 16:07:32,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831488433] [2021-05-03 16:07:32,993 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 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 [2021-05-03 16:07:33,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:07:33,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:07:33,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:07:33,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:33,086 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:07:33,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:33,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 16:07:33,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456330113] [2021-05-03 16:07:33,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 16:07:33,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:33,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 16:07:33,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:07:33,087 INFO L87 Difference]: Start difference. First operand 109419 states and 407668 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 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) [2021-05-03 16:07:34,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:34,596 INFO L93 Difference]: Finished difference Result 119643 states and 441774 transitions. [2021-05-03 16:07:34,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 16:07:34,601 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 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 35 [2021-05-03 16:07:34,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:35,515 INFO L225 Difference]: With dead ends: 119643 [2021-05-03 16:07:35,515 INFO L226 Difference]: Without dead ends: 119509 [2021-05-03 16:07:35,515 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:07:35,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119509 states. [2021-05-03 16:07:37,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119509 to 115545. [2021-05-03 16:07:37,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115545 states, 115544 states have (on average 3.711131690092086) internal successors, (428799), 115544 states have internal predecessors, (428799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:38,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115545 states to 115545 states and 428799 transitions. [2021-05-03 16:07:38,964 INFO L78 Accepts]: Start accepts. Automaton has 115545 states and 428799 transitions. Word has length 35 [2021-05-03 16:07:38,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:38,964 INFO L480 AbstractCegarLoop]: Abstraction has 115545 states and 428799 transitions. [2021-05-03 16:07:38,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 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) [2021-05-03 16:07:38,964 INFO L276 IsEmpty]: Start isEmpty. Operand 115545 states and 428799 transitions. [2021-05-03 16:07:39,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 16:07:39,132 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:39,132 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:39,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-05-03 16:07:39,333 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:39,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:39,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1649480959, now seen corresponding path program 65 times [2021-05-03 16:07:39,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:39,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497086589] [2021-05-03 16:07:39,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:39,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:39,381 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:07:39,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497086589] [2021-05-03 16:07:39,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181999109] [2021-05-03 16:07:39,382 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 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 [2021-05-03 16:07:39,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:07:39,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:07:39,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:07:39,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:39,509 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:07:39,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:39,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-03 16:07:39,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397983369] [2021-05-03 16:07:39,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:07:39,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:39,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:07:39,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:07:39,511 INFO L87 Difference]: Start difference. First operand 115545 states and 428799 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:42,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:42,009 INFO L93 Difference]: Finished difference Result 135877 states and 495198 transitions. [2021-05-03 16:07:42,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-03 16:07:42,010 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 16:07:42,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:42,520 INFO L225 Difference]: With dead ends: 135877 [2021-05-03 16:07:42,520 INFO L226 Difference]: Without dead ends: 135694 [2021-05-03 16:07:42,520 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 654.3ms TimeCoverageRelationStatistics Valid=951, Invalid=3879, Unknown=0, NotChecked=0, Total=4830 [2021-05-03 16:07:42,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135694 states. [2021-05-03 16:07:45,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135694 to 124589. [2021-05-03 16:07:45,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124589 states, 124588 states have (on average 3.720944232189296) internal successors, (463585), 124588 states have internal predecessors, (463585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:46,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124589 states to 124589 states and 463585 transitions. [2021-05-03 16:07:46,109 INFO L78 Accepts]: Start accepts. Automaton has 124589 states and 463585 transitions. Word has length 35 [2021-05-03 16:07:46,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:46,110 INFO L480 AbstractCegarLoop]: Abstraction has 124589 states and 463585 transitions. [2021-05-03 16:07:46,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:46,110 INFO L276 IsEmpty]: Start isEmpty. Operand 124589 states and 463585 transitions. [2021-05-03 16:07:46,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 16:07:46,309 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:46,309 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:46,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:46,513 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:46,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:46,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1631568121, now seen corresponding path program 66 times [2021-05-03 16:07:46,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:46,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344626673] [2021-05-03 16:07:46,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:46,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:47,560 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:47,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344626673] [2021-05-03 16:07:47,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605604458] [2021-05-03 16:07:47,561 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 [2021-05-03 16:07:47,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 16:07:47,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:07:47,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-03 16:07:47,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:47,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:07:47,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:47,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:07:47,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:07:47,894 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:59 [2021-05-03 16:07:48,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-05-03 16:07:48,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:48,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:07:48,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:07:48,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:70 [2021-05-03 16:07:48,237 INFO L446 ElimStorePlain]: Different costs {3=[v_C_81], 7=[A, B]} [2021-05-03 16:07:48,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:07:48,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:07:48,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 47 [2021-05-03 16:07:48,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:48,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:07:48,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:07:48,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:07:48,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:07:48,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:07:48,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:07:48,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:07:48,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2021-05-03 16:07:48,280 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:48,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:07:48,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:07:48,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:07:48,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:07:48,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:07:48,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:07:48,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 27 [2021-05-03 16:07:48,303 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:48,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:07:48,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:07:48,315 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:85, output treesize:27 [2021-05-03 16:07:48,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-05-03 16:07:48,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:48,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:07:48,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:07:48,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-05-03 16:07:48,397 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:48,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:48,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-05-03 16:07:48,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198742735] [2021-05-03 16:07:48,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 16:07:48,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:48,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 16:07:48,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-05-03 16:07:48,398 INFO L87 Difference]: Start difference. First operand 124589 states and 463585 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:51,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:51,225 INFO L93 Difference]: Finished difference Result 125452 states and 466154 transitions. [2021-05-03 16:07:51,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 16:07:51,227 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-03 16:07:51,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:51,632 INFO L225 Difference]: With dead ends: 125452 [2021-05-03 16:07:51,632 INFO L226 Difference]: Without dead ends: 125382 [2021-05-03 16:07:51,632 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1964.5ms TimeCoverageRelationStatistics Valid=93, Invalid=899, Unknown=0, NotChecked=0, Total=992 [2021-05-03 16:07:51,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125382 states. [2021-05-03 16:07:54,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125382 to 124705. [2021-05-03 16:07:54,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124705 states, 124704 states have (on average 3.7204179497049013) internal successors, (463951), 124704 states have internal predecessors, (463951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:55,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124705 states to 124705 states and 463951 transitions. [2021-05-03 16:07:55,091 INFO L78 Accepts]: Start accepts. Automaton has 124705 states and 463951 transitions. Word has length 37 [2021-05-03 16:07:55,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:07:55,091 INFO L480 AbstractCegarLoop]: Abstraction has 124705 states and 463951 transitions. [2021-05-03 16:07:55,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:55,091 INFO L276 IsEmpty]: Start isEmpty. Operand 124705 states and 463951 transitions. [2021-05-03 16:07:55,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 16:07:55,285 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:07:55,285 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:07:55,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:07:55,486 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:07:55,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:07:55,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1480173021, now seen corresponding path program 67 times [2021-05-03 16:07:55,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:07:55,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78532911] [2021-05-03 16:07:55,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:07:55,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:55,892 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:55,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78532911] [2021-05-03 16:07:55,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153086121] [2021-05-03 16:07:55,893 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 [2021-05-03 16:07:55,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:07:55,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-03 16:07:55,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:07:56,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:07:56,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:56,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:07:56,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:07:56,087 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:47 [2021-05-03 16:07:56,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:07:56,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-05-03 16:07:56,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:56,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:07:56,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:07:56,213 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:69, output treesize:74 [2021-05-03 16:07:56,279 INFO L446 ElimStorePlain]: Different costs {3=[v_C_84], 12=[A, B]} [2021-05-03 16:07:56,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:07:56,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:07:56,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:07:56,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2021-05-03 16:07:56,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:56,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:07:56,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:07:56,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:07:56,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:07:56,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:07:56,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:07:56,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 51 [2021-05-03 16:07:56,315 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:56,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:07:56,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:07:56,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:07:56,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:07:56,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:07:56,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:07:56,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 43 [2021-05-03 16:07:56,333 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:56,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:07:56,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:07:56,341 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:29 [2021-05-03 16:07:56,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-05-03 16:07:56,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:07:56,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:07:56,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:07:56,423 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:5 [2021-05-03 16:07:56,450 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:07:56,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:07:56,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-05-03 16:07:56,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527716145] [2021-05-03 16:07:56,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 16:07:56,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:07:56,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 16:07:56,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-05-03 16:07:56,451 INFO L87 Difference]: Start difference. First operand 124705 states and 463951 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:07:58,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:07:58,456 INFO L93 Difference]: Finished difference Result 125400 states and 466064 transitions. [2021-05-03 16:07:58,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 16:07:58,457 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-03 16:07:58,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:07:58,897 INFO L225 Difference]: With dead ends: 125400 [2021-05-03 16:07:58,897 INFO L226 Difference]: Without dead ends: 125324 [2021-05-03 16:07:58,898 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 676.2ms TimeCoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:07:59,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125324 states. [2021-05-03 16:08:01,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125324 to 124689. [2021-05-03 16:08:01,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124689 states, 124688 states have (on average 3.7207509944822275) internal successors, (463933), 124688 states have internal predecessors, (463933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:08:02,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124689 states to 124689 states and 463933 transitions. [2021-05-03 16:08:02,079 INFO L78 Accepts]: Start accepts. Automaton has 124689 states and 463933 transitions. Word has length 37 [2021-05-03 16:08:02,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:08:02,079 INFO L480 AbstractCegarLoop]: Abstraction has 124689 states and 463933 transitions. [2021-05-03 16:08:02,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:08:02,079 INFO L276 IsEmpty]: Start isEmpty. Operand 124689 states and 463933 transitions. [2021-05-03 16:08:02,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 16:08:02,274 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:08:02,275 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:08:02,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:08:02,475 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:08:02,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:08:02,475 INFO L82 PathProgramCache]: Analyzing trace with hash 909842105, now seen corresponding path program 68 times [2021-05-03 16:08:02,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:08:02,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819974510] [2021-05-03 16:08:02,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:08:02,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:08:02,829 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:08:02,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819974510] [2021-05-03 16:08:02,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926513983] [2021-05-03 16:08:02,829 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 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 [2021-05-03 16:08:02,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:08:02,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:08:02,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-03 16:08:02,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:08:02,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-05-03 16:08:02,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:03,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:03,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:08:03,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:53 [2021-05-03 16:08:03,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:03,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:08:03,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:03,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:03,649 WARN L205 SmtUtils]: Spent 557.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 16:08:03,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:08:03,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:64 [2021-05-03 16:08:03,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2021-05-03 16:08:03,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:03,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:03,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-05-03 16:08:03,888 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:03,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:03,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 29 [2021-05-03 16:08:03,899 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:03,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:03,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:08:03,906 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:27 [2021-05-03 16:08:03,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-05-03 16:08:03,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:03,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:03,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:08:03,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-05-03 16:08:03,983 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:08:03,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:08:03,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-05-03 16:08:03,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950925816] [2021-05-03 16:08:03,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 16:08:03,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:08:03,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 16:08:03,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-05-03 16:08:03,984 INFO L87 Difference]: Start difference. First operand 124689 states and 463933 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:08:05,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:08:05,511 INFO L93 Difference]: Finished difference Result 125438 states and 466245 transitions. [2021-05-03 16:08:05,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 16:08:05,513 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-03 16:08:05,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:08:05,948 INFO L225 Difference]: With dead ends: 125438 [2021-05-03 16:08:05,948 INFO L226 Difference]: Without dead ends: 125411 [2021-05-03 16:08:05,948 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 693.8ms TimeCoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:08:06,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125411 states. [2021-05-03 16:08:08,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125411 to 124783. [2021-05-03 16:08:08,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124783 states, 124782 states have (on average 3.720432434165184) internal successors, (464243), 124782 states have internal predecessors, (464243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:08:09,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124783 states to 124783 states and 464243 transitions. [2021-05-03 16:08:09,318 INFO L78 Accepts]: Start accepts. Automaton has 124783 states and 464243 transitions. Word has length 37 [2021-05-03 16:08:09,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:08:09,318 INFO L480 AbstractCegarLoop]: Abstraction has 124783 states and 464243 transitions. [2021-05-03 16:08:09,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:08:09,318 INFO L276 IsEmpty]: Start isEmpty. Operand 124783 states and 464243 transitions. [2021-05-03 16:08:10,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 16:08:10,140 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:08:10,141 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:08:10,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2021-05-03 16:08:10,364 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:08:10,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:08:10,364 INFO L82 PathProgramCache]: Analyzing trace with hash 2093068259, now seen corresponding path program 69 times [2021-05-03 16:08:10,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:08:10,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606496383] [2021-05-03 16:08:10,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:08:10,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:08:10,762 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:08:10,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606496383] [2021-05-03 16:08:10,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428947404] [2021-05-03 16:08:10,763 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 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 [2021-05-03 16:08:10,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 16:08:10,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:08:10,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-03 16:08:10,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:08:11,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:08:11,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:11,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:11,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:08:11,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:53 [2021-05-03 16:08:11,175 INFO L354 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2021-05-03 16:08:11,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:08:11,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:11,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:11,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:08:11,208 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:70 [2021-05-03 16:08:11,436 INFO L446 ElimStorePlain]: Different costs {3=[v_C_90], 9=[A, B]} [2021-05-03 16:08:11,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:11,456 INFO L354 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2021-05-03 16:08:11,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 49 [2021-05-03 16:08:11,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:11,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:11,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:11,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:11,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:11,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:11,534 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-05-03 16:08:11,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 64 [2021-05-03 16:08:11,543 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 16:08:11,584 INFO L628 ElimStorePlain]: treesize reduction 31, result has 67.0 percent of original size [2021-05-03 16:08:11,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:11,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:11,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:11,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:11,622 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:11,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 74 [2021-05-03 16:08:11,661 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-05-03 16:08:11,712 INFO L628 ElimStorePlain]: treesize reduction 175, result has 19.0 percent of original size [2021-05-03 16:08:11,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:08:11,721 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:84, output treesize:44 [2021-05-03 16:08:12,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:12,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:12,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:12,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:12,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:12,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:12,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 63 [2021-05-03 16:08:12,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:08:12,086 INFO L628 ElimStorePlain]: treesize reduction 29, result has 50.8 percent of original size [2021-05-03 16:08:12,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:08:12,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:31 [2021-05-03 16:08:12,216 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:08:12,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:08:12,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2021-05-03 16:08:12,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664956064] [2021-05-03 16:08:12,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 16:08:12,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:08:12,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 16:08:12,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2021-05-03 16:08:12,218 INFO L87 Difference]: Start difference. First operand 124783 states and 464243 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:08:16,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:08:16,470 INFO L93 Difference]: Finished difference Result 125864 states and 467491 transitions. [2021-05-03 16:08:16,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 16:08:16,472 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-03 16:08:16,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:08:16,910 INFO L225 Difference]: With dead ends: 125864 [2021-05-03 16:08:16,910 INFO L226 Difference]: Without dead ends: 125822 [2021-05-03 16:08:16,910 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1748.7ms TimeCoverageRelationStatistics Valid=128, Invalid=1354, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 16:08:17,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125822 states. [2021-05-03 16:08:19,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125822 to 124771. [2021-05-03 16:08:19,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124771 states, 124770 states have (on average 3.7207181213432716) internal successors, (464234), 124770 states have internal predecessors, (464234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:08:20,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124771 states to 124771 states and 464234 transitions. [2021-05-03 16:08:20,182 INFO L78 Accepts]: Start accepts. Automaton has 124771 states and 464234 transitions. Word has length 37 [2021-05-03 16:08:20,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:08:20,183 INFO L480 AbstractCegarLoop]: Abstraction has 124771 states and 464234 transitions. [2021-05-03 16:08:20,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:08:20,183 INFO L276 IsEmpty]: Start isEmpty. Operand 124771 states and 464234 transitions. [2021-05-03 16:08:20,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 16:08:20,383 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:08:20,384 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:08:20,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:08:20,584 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:08:20,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:08:20,585 INFO L82 PathProgramCache]: Analyzing trace with hash 351064743, now seen corresponding path program 70 times [2021-05-03 16:08:20,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:08:20,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104398874] [2021-05-03 16:08:20,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:08:20,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:08:21,690 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:08:21,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104398874] [2021-05-03 16:08:21,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714861592] [2021-05-03 16:08:21,691 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 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 [2021-05-03 16:08:21,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:08:21,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:08:21,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-03 16:08:21,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:08:21,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:08:21,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:22,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:22,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:08:22,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:47 [2021-05-03 16:08:22,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:22,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:08:22,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:22,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:22,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:08:22,096 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:64 [2021-05-03 16:08:22,163 INFO L446 ElimStorePlain]: Different costs {3=[v_C_93], 12=[A, B]} [2021-05-03 16:08:22,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:22,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:22,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:22,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2021-05-03 16:08:22,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:22,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:22,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:22,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:22,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:22,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:08:22,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:08:22,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 42 [2021-05-03 16:08:22,201 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:22,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:22,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:22,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:22,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:22,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:08:22,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:08:22,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2021-05-03 16:08:22,219 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:22,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:22,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:08:22,227 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:77, output treesize:25 [2021-05-03 16:08:22,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2021-05-03 16:08:22,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:22,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:22,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:08:22,358 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:11 [2021-05-03 16:08:22,391 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:08:22,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:08:22,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-05-03 16:08:22,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618559847] [2021-05-03 16:08:22,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 16:08:22,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:08:22,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 16:08:22,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:08:22,392 INFO L87 Difference]: Start difference. First operand 124771 states and 464234 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:08:25,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:08:25,265 INFO L93 Difference]: Finished difference Result 125430 states and 466212 transitions. [2021-05-03 16:08:25,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 16:08:25,278 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-03 16:08:25,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:08:25,797 INFO L225 Difference]: With dead ends: 125430 [2021-05-03 16:08:25,797 INFO L226 Difference]: Without dead ends: 125403 [2021-05-03 16:08:25,798 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1675.9ms TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:08:25,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125403 states. [2021-05-03 16:08:27,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125403 to 124983. [2021-05-03 16:08:28,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124983 states, 124982 states have (on average 3.7197996511497657) internal successors, (464908), 124982 states have internal predecessors, (464908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:08:29,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124983 states to 124983 states and 464908 transitions. [2021-05-03 16:08:29,337 INFO L78 Accepts]: Start accepts. Automaton has 124983 states and 464908 transitions. Word has length 37 [2021-05-03 16:08:29,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:08:29,338 INFO L480 AbstractCegarLoop]: Abstraction has 124983 states and 464908 transitions. [2021-05-03 16:08:29,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:08:29,338 INFO L276 IsEmpty]: Start isEmpty. Operand 124983 states and 464908 transitions. [2021-05-03 16:08:29,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 16:08:29,586 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:08:29,586 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:08:29,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:08:29,787 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:08:29,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:08:29,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1709357799, now seen corresponding path program 71 times [2021-05-03 16:08:29,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:08:29,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65327598] [2021-05-03 16:08:29,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:08:29,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:08:30,217 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:08:30,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65327598] [2021-05-03 16:08:30,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932470872] [2021-05-03 16:08:30,218 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 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 [2021-05-03 16:08:30,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:08:30,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:08:30,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-03 16:08:30,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:08:30,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-05-03 16:08:30,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:30,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:30,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:08:30,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:53 [2021-05-03 16:08:30,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:30,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-05-03 16:08:30,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:30,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:30,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:08:30,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:69, output treesize:64 [2021-05-03 16:08:30,726 INFO L446 ElimStorePlain]: Different costs {3=[v_C_96], 12=[A, B]} [2021-05-03 16:08:30,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:30,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:30,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:30,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 66 [2021-05-03 16:08:30,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:30,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:30,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:30,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:30,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:30,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:08:30,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:30,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:08:30,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 58 [2021-05-03 16:08:30,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:30,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:30,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:30,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:30,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:30,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:08:30,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:30,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:08:30,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-05-03 16:08:30,790 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:30,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:30,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:08:30,799 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:92, output treesize:26 [2021-05-03 16:08:30,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-05-03 16:08:30,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:30,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:30,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:08:30,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:5 [2021-05-03 16:08:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:08:30,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:08:30,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 16:08:30,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55361836] [2021-05-03 16:08:30,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 16:08:30,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:08:30,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 16:08:30,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:08:30,879 INFO L87 Difference]: Start difference. First operand 124983 states and 464908 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:08:32,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:08:32,803 INFO L93 Difference]: Finished difference Result 125358 states and 466010 transitions. [2021-05-03 16:08:32,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 16:08:32,804 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-03 16:08:32,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:08:33,282 INFO L225 Difference]: With dead ends: 125358 [2021-05-03 16:08:33,282 INFO L226 Difference]: Without dead ends: 125271 [2021-05-03 16:08:33,282 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 789.0ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-05-03 16:08:33,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125271 states. [2021-05-03 16:08:35,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125271 to 125033. [2021-05-03 16:08:35,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125033 states, 125032 states have (on average 3.719527800882974) internal successors, (465060), 125032 states have internal predecessors, (465060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:08:36,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125033 states to 125033 states and 465060 transitions. [2021-05-03 16:08:36,864 INFO L78 Accepts]: Start accepts. Automaton has 125033 states and 465060 transitions. Word has length 37 [2021-05-03 16:08:36,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:08:36,864 INFO L480 AbstractCegarLoop]: Abstraction has 125033 states and 465060 transitions. [2021-05-03 16:08:36,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:08:36,864 INFO L276 IsEmpty]: Start isEmpty. Operand 125033 states and 465060 transitions. [2021-05-03 16:08:37,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 16:08:37,078 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:08:37,078 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:08:37,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:08:37,278 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:08:37,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:08:37,279 INFO L82 PathProgramCache]: Analyzing trace with hash -526131645, now seen corresponding path program 72 times [2021-05-03 16:08:37,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:08:37,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025531538] [2021-05-03 16:08:37,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:08:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:08:37,819 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:08:37,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025531538] [2021-05-03 16:08:37,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795133649] [2021-05-03 16:08:37,819 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 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 [2021-05-03 16:08:37,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:08:37,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:08:37,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-03 16:08:37,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:08:37,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-05-03 16:08:37,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:37,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:37,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:08:37,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:50 [2021-05-03 16:08:38,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:08:38,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:38,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-05-03 16:08:38,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:38,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:38,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:08:38,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:83, output treesize:82 [2021-05-03 16:08:38,378 INFO L446 ElimStorePlain]: Different costs {3=[v_C_99], 14=[A, B]} [2021-05-03 16:08:38,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:38,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:38,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:38,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 55 [2021-05-03 16:08:38,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:38,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:38,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:38,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:38,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:08:38,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:38,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:38,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 58 treesize of output 70 [2021-05-03 16:08:38,462 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:38,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:38,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:38,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:38,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:38,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:08:38,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:38,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 110 treesize of output 110 [2021-05-03 16:08:38,560 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 16:08:38,702 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 46 [2021-05-03 16:08:38,703 INFO L628 ElimStorePlain]: treesize reduction 226, result has 39.4 percent of original size [2021-05-03 16:08:38,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:08:38,719 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:94, output treesize:245 [2021-05-03 16:08:39,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-05-03 16:08:39,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:39,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:39,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:08:39,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:5 [2021-05-03 16:08:39,061 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:08:39,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:08:39,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 23 [2021-05-03 16:08:39,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013070422] [2021-05-03 16:08:39,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 16:08:39,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:08:39,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 16:08:39,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-05-03 16:08:39,061 INFO L87 Difference]: Start difference. First operand 125033 states and 465060 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:08:40,403 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-05-03 16:08:42,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:08:42,255 INFO L93 Difference]: Finished difference Result 125555 states and 466538 transitions. [2021-05-03 16:08:42,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:08:42,256 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-03 16:08:42,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:08:42,690 INFO L225 Difference]: With dead ends: 125555 [2021-05-03 16:08:42,691 INFO L226 Difference]: Without dead ends: 125312 [2021-05-03 16:08:42,691 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 2016.2ms TimeCoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-05-03 16:08:42,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125312 states. [2021-05-03 16:08:45,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125312 to 125007. [2021-05-03 16:08:45,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125007 states, 125006 states have (on average 3.719677455482137) internal successors, (464982), 125006 states have internal predecessors, (464982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:08:45,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125007 states to 125007 states and 464982 transitions. [2021-05-03 16:08:45,909 INFO L78 Accepts]: Start accepts. Automaton has 125007 states and 464982 transitions. Word has length 37 [2021-05-03 16:08:45,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:08:45,909 INFO L480 AbstractCegarLoop]: Abstraction has 125007 states and 464982 transitions. [2021-05-03 16:08:45,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:08:45,910 INFO L276 IsEmpty]: Start isEmpty. Operand 125007 states and 464982 transitions. [2021-05-03 16:08:46,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 16:08:46,131 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:08:46,131 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:08:46,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-05-03 16:08:46,332 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:08:46,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:08:46,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1749520249, now seen corresponding path program 73 times [2021-05-03 16:08:46,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:08:46,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268871634] [2021-05-03 16:08:46,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:08:46,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:08:47,394 WARN L205 SmtUtils]: Spent 703.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-05-03 16:08:47,609 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:08:47,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268871634] [2021-05-03 16:08:47,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886655639] [2021-05-03 16:08:47,610 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 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 [2021-05-03 16:08:47,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:08:47,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-03 16:08:47,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:08:47,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:08:47,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:47,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:47,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:08:47,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:52 [2021-05-03 16:08:47,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:47,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-05-03 16:08:47,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:47,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:47,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:08:47,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:69 [2021-05-03 16:08:48,182 INFO L446 ElimStorePlain]: Different costs {3=[v_C_102], 12=[A, B]} [2021-05-03 16:08:48,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:48,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:48,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:48,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 58 [2021-05-03 16:08:48,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:48,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:48,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:48,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:48,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:48,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:08:48,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:48,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:08:48,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 43 [2021-05-03 16:08:48,233 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:48,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:48,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:48,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:48,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:48,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:08:48,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:48,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:08:48,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:08:48,259 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:48,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:48,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:08:48,269 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:88, output treesize:26 [2021-05-03 16:08:48,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-05-03 16:08:48,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:48,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:48,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:08:48,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:5 [2021-05-03 16:08:48,369 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:08:48,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:08:48,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-05-03 16:08:48,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611082365] [2021-05-03 16:08:48,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 16:08:48,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:08:48,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 16:08:48,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-05-03 16:08:48,370 INFO L87 Difference]: Start difference. First operand 125007 states and 464982 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:08:50,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:08:50,579 INFO L93 Difference]: Finished difference Result 125662 states and 466910 transitions. [2021-05-03 16:08:50,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 16:08:50,581 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-03 16:08:50,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:08:51,527 INFO L225 Difference]: With dead ends: 125662 [2021-05-03 16:08:51,527 INFO L226 Difference]: Without dead ends: 125488 [2021-05-03 16:08:51,527 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1848.8ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-05-03 16:08:51,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125488 states. [2021-05-03 16:08:53,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125488 to 125059. [2021-05-03 16:08:53,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125059 states, 125058 states have (on average 3.7194421788290235) internal successors, (465146), 125058 states have internal predecessors, (465146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:08:54,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125059 states to 125059 states and 465146 transitions. [2021-05-03 16:08:54,810 INFO L78 Accepts]: Start accepts. Automaton has 125059 states and 465146 transitions. Word has length 37 [2021-05-03 16:08:54,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:08:54,810 INFO L480 AbstractCegarLoop]: Abstraction has 125059 states and 465146 transitions. [2021-05-03 16:08:54,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:08:54,810 INFO L276 IsEmpty]: Start isEmpty. Operand 125059 states and 465146 transitions. [2021-05-03 16:08:55,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 16:08:55,198 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:08:55,198 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:08:55,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:08:55,399 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:08:55,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:08:55,399 INFO L82 PathProgramCache]: Analyzing trace with hash -395343355, now seen corresponding path program 74 times [2021-05-03 16:08:55,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:08:55,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856832015] [2021-05-03 16:08:55,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:08:55,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:08:56,229 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:08:56,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856832015] [2021-05-03 16:08:56,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970305315] [2021-05-03 16:08:56,229 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 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 [2021-05-03 16:08:56,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:08:56,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:08:56,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-03 16:08:56,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:08:56,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-05-03 16:08:56,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:56,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:56,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:08:56,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:50 [2021-05-03 16:08:56,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:56,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-05-03 16:08:56,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:56,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:56,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:08:56,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:61 [2021-05-03 16:08:56,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:56,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:56,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:08:56,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 58 [2021-05-03 16:08:56,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:56,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:56,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:08:56,788 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:85, output treesize:84 [2021-05-03 16:08:56,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2021-05-03 16:08:56,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:56,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:56,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:08:56,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:70, output treesize:43 [2021-05-03 16:08:56,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-05-03 16:08:56,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:56,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:56,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-05-03 16:08:56,996 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:08:56,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:08:57,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:08:57,000 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:5 [2021-05-03 16:08:57,045 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:08:57,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:08:57,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-05-03 16:08:57,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549223436] [2021-05-03 16:08:57,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 16:08:57,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:08:57,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 16:08:57,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-05-03 16:08:57,046 INFO L87 Difference]: Start difference. First operand 125059 states and 465146 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:08:57,561 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-05-03 16:08:58,306 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 43 [2021-05-03 16:08:58,512 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-05-03 16:08:59,694 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 46 [2021-05-03 16:09:00,202 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-05-03 16:09:02,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:09:02,774 INFO L93 Difference]: Finished difference Result 192358 states and 711241 transitions. [2021-05-03 16:09:02,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 16:09:02,775 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-03 16:09:02,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:09:04,508 INFO L225 Difference]: With dead ends: 192358 [2021-05-03 16:09:04,508 INFO L226 Difference]: Without dead ends: 192330 [2021-05-03 16:09:04,509 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 3628.3ms TimeCoverageRelationStatistics Valid=367, Invalid=2183, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 16:09:04,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192330 states. [2021-05-03 16:09:08,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192330 to 125128. [2021-05-03 16:09:08,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125128 states, 125127 states have (on average 3.7191972955477235) internal successors, (465372), 125127 states have internal predecessors, (465372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:09:09,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125128 states to 125128 states and 465372 transitions. [2021-05-03 16:09:09,009 INFO L78 Accepts]: Start accepts. Automaton has 125128 states and 465372 transitions. Word has length 37 [2021-05-03 16:09:09,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:09:09,009 INFO L480 AbstractCegarLoop]: Abstraction has 125128 states and 465372 transitions. [2021-05-03 16:09:09,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:09:09,010 INFO L276 IsEmpty]: Start isEmpty. Operand 125128 states and 465372 transitions. [2021-05-03 16:09:09,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 16:09:09,216 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:09:09,216 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:09:09,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:09:09,417 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:09:09,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:09:09,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1514138647, now seen corresponding path program 75 times [2021-05-03 16:09:09,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:09:09,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630322926] [2021-05-03 16:09:09,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:09:09,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:09:10,400 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:09:10,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630322926] [2021-05-03 16:09:10,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222086463] [2021-05-03 16:09:10,401 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 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 [2021-05-03 16:09:10,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 16:09:10,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:09:10,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-03 16:09:10,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:09:10,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:09:10,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:09:10,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:09:10,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:09:10,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:50 [2021-05-03 16:09:10,832 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-05-03 16:09:10,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2021-05-03 16:09:10,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:09:10,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:09:10,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:09:10,858 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:88, output treesize:92 [2021-05-03 16:09:11,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:09:11,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:09:11,364 INFO L354 Elim1Store]: treesize reduction 63, result has 10.0 percent of original size [2021-05-03 16:09:11,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 68 treesize of output 76 [2021-05-03 16:09:11,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:09:11,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:09:11,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:09:11,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:114, output treesize:113 [2021-05-03 16:09:11,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:09:11,631 INFO L354 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2021-05-03 16:09:11,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 86 [2021-05-03 16:09:11,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:09:11,760 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2021-05-03 16:09:11,761 INFO L628 ElimStorePlain]: treesize reduction 156, result has 31.6 percent of original size [2021-05-03 16:09:11,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:09:11,811 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:09:11,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 87 [2021-05-03 16:09:12,301 WARN L205 SmtUtils]: Spent 485.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-05-03 16:09:12,359 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-05-03 16:09:12,432 INFO L628 ElimStorePlain]: treesize reduction 25, result has 66.7 percent of original size [2021-05-03 16:09:12,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:09:12,440 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:92, output treesize:50 [2021-05-03 16:09:12,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:09:12,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:09:12,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 14 treesize of output 25 [2021-05-03 16:09:12,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:09:12,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:09:12,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:09:12,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:09:12,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 6 [2021-05-03 16:09:12,630 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:09:12,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:09:12,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:09:12,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:09:12,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:09:12,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:09:12,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:09:12,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-05-03 16:09:12,642 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:09:12,718 INFO L628 ElimStorePlain]: treesize reduction 8, result has 87.9 percent of original size [2021-05-03 16:09:12,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-03 16:09:12,720 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:119, output treesize:38 [2021-05-03 16:09:12,886 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:09:12,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:09:12,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-05-03 16:09:12,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130856535] [2021-05-03 16:09:12,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 16:09:12,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:09:12,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 16:09:12,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-05-03 16:09:12,888 INFO L87 Difference]: Start difference. First operand 125128 states and 465372 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:09:13,368 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-05-03 16:09:14,035 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 40 [2021-05-03 16:09:14,609 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 45 [2021-05-03 16:09:14,853 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2021-05-03 16:09:15,456 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 42 [2021-05-03 16:09:15,685 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 40 [2021-05-03 16:09:15,906 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 43 [2021-05-03 16:09:16,410 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 48 [2021-05-03 16:09:17,595 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-05-03 16:09:17,764 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-05-03 16:09:18,103 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-05-03 16:09:18,591 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2021-05-03 16:09:18,908 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-05-03 16:09:19,333 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-05-03 16:09:19,542 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-05-03 16:09:19,920 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 61 [2021-05-03 16:09:20,231 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-05-03 16:09:20,483 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2021-05-03 16:09:21,657 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 45 [2021-05-03 16:09:21,963 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-05-03 16:09:22,158 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-05-03 16:09:22,642 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-05-03 16:09:23,114 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 46 [2021-05-03 16:09:24,349 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-05-03 16:09:24,543 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-05-03 16:09:24,966 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-05-03 16:09:25,522 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2021-05-03 16:09:26,623 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 71 [2021-05-03 16:09:27,322 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2021-05-03 16:09:27,726 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-05-03 16:09:28,519 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 80 [2021-05-03 16:09:28,802 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2021-05-03 16:09:29,183 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2021-05-03 16:09:29,654 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2021-05-03 16:09:30,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:09:30,761 INFO L93 Difference]: Finished difference Result 197255 states and 727252 transitions. [2021-05-03 16:09:30,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-03 16:09:30,764 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-03 16:09:30,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:09:31,573 INFO L225 Difference]: With dead ends: 197255 [2021-05-03 16:09:31,573 INFO L226 Difference]: Without dead ends: 196935 [2021-05-03 16:09:31,574 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2642 ImplicationChecksByTransitivity, 12568.6ms TimeCoverageRelationStatistics Valid=1274, Invalid=7468, Unknown=0, NotChecked=0, Total=8742 [2021-05-03 16:09:31,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196935 states. [2021-05-03 16:09:35,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196935 to 125194. [2021-05-03 16:09:35,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125194 states, 125193 states have (on average 3.7186743667776954) internal successors, (465552), 125193 states have internal predecessors, (465552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:09:36,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125194 states to 125194 states and 465552 transitions. [2021-05-03 16:09:36,565 INFO L78 Accepts]: Start accepts. Automaton has 125194 states and 465552 transitions. Word has length 37 [2021-05-03 16:09:36,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:09:36,565 INFO L480 AbstractCegarLoop]: Abstraction has 125194 states and 465552 transitions. [2021-05-03 16:09:36,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:09:36,565 INFO L276 IsEmpty]: Start isEmpty. Operand 125194 states and 465552 transitions. [2021-05-03 16:09:36,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 16:09:36,890 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:09:36,890 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:09:37,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:09:37,091 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:09:37,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:09:37,091 INFO L82 PathProgramCache]: Analyzing trace with hash -759209629, now seen corresponding path program 76 times [2021-05-03 16:09:37,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:09:37,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608066959] [2021-05-03 16:09:37,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:09:37,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:09:37,527 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-05-03 16:09:38,025 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:09:38,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608066959] [2021-05-03 16:09:38,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577551704] [2021-05-03 16:09:38,025 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 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 [2021-05-03 16:09:38,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:09:38,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:09:38,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-03 16:09:38,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:09:38,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-05-03 16:09:38,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:09:38,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:09:38,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:09:38,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:58 [2021-05-03 16:09:38,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:09:38,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:09:38,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-05-03 16:09:38,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:09:38,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:09:38,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:09:38,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:80, output treesize:75 [2021-05-03 16:09:38,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2021-05-03 16:09:38,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:09:38,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:09:38,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-05-03 16:09:38,816 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:09:38,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:09:38,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 29 [2021-05-03 16:09:38,841 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:09:38,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:09:38,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:09:38,858 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:22 [2021-05-03 16:09:38,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-05-03 16:09:38,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:09:38,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:09:38,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:09:38,996 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:5 [2021-05-03 16:09:39,056 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:09:39,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:09:39,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-05-03 16:09:39,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358716225] [2021-05-03 16:09:39,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 16:09:39,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:09:39,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 16:09:39,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-05-03 16:09:39,058 INFO L87 Difference]: Start difference. First operand 125194 states and 465552 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:09:39,500 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-05-03 16:09:41,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:09:41,839 INFO L93 Difference]: Finished difference Result 125783 states and 467356 transitions. [2021-05-03 16:09:41,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:09:41,840 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-03 16:09:41,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:09:42,309 INFO L225 Difference]: With dead ends: 125783 [2021-05-03 16:09:42,309 INFO L226 Difference]: Without dead ends: 125696 [2021-05-03 16:09:42,310 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1599.6ms TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:09:42,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125696 states. [2021-05-03 16:09:44,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125696 to 125218. [2021-05-03 16:09:44,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125218 states, 125217 states have (on average 3.7185525926990746) internal successors, (465626), 125217 states have internal predecessors, (465626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:09:46,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125218 states to 125218 states and 465626 transitions. [2021-05-03 16:09:46,101 INFO L78 Accepts]: Start accepts. Automaton has 125218 states and 465626 transitions. Word has length 37 [2021-05-03 16:09:46,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:09:46,101 INFO L480 AbstractCegarLoop]: Abstraction has 125218 states and 465626 transitions. [2021-05-03 16:09:46,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:09:46,101 INFO L276 IsEmpty]: Start isEmpty. Operand 125218 states and 465626 transitions. [2021-05-03 16:09:46,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 16:09:46,353 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:09:46,353 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:09:46,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-05-03 16:09:46,554 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:09:46,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:09:46,554 INFO L82 PathProgramCache]: Analyzing trace with hash 960803363, now seen corresponding path program 77 times [2021-05-03 16:09:46,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:09:46,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401650195] [2021-05-03 16:09:46,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:09:46,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:09:46,936 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-05-03 16:09:47,301 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-05-03 16:09:47,481 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:09:47,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401650195] [2021-05-03 16:09:47,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182016129] [2021-05-03 16:09:47,481 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 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 [2021-05-03 16:09:47,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:09:47,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:09:47,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-03 16:09:47,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:09:47,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:09:47,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:09:47,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:09:47,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:09:47,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:55 [2021-05-03 16:09:48,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:09:48,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2021-05-03 16:09:48,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:09:48,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:09:48,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:09:48,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:70, output treesize:67 [2021-05-03 16:09:48,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-05-03 16:09:48,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:09:48,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:09:48,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-05-03 16:09:48,422 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:09:48,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:09:48,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 27 [2021-05-03 16:09:48,443 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:09:48,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:09:48,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:09:48,464 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:65, output treesize:21 [2021-05-03 16:09:48,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-05-03 16:09:48,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:09:48,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:09:48,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:09:48,717 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:5 [2021-05-03 16:09:48,797 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:09:48,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:09:48,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 16:09:48,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754362842] [2021-05-03 16:09:48,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 16:09:48,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:09:48,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 16:09:48,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:09:48,799 INFO L87 Difference]: Start difference. First operand 125218 states and 465626 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:09:49,523 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-05-03 16:09:52,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:09:52,610 INFO L93 Difference]: Finished difference Result 125897 states and 467681 transitions. [2021-05-03 16:09:52,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:09:52,613 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-03 16:09:52,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:09:53,132 INFO L225 Difference]: With dead ends: 125897 [2021-05-03 16:09:53,132 INFO L226 Difference]: Without dead ends: 125756 [2021-05-03 16:09:53,133 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1782.1ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-05-03 16:09:53,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125756 states. [2021-05-03 16:09:56,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125756 to 125208. [2021-05-03 16:09:56,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125208 states, 125207 states have (on average 3.7186099818700233) internal successors, (465596), 125207 states have internal predecessors, (465596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:09:56,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125208 states to 125208 states and 465596 transitions. [2021-05-03 16:09:56,860 INFO L78 Accepts]: Start accepts. Automaton has 125208 states and 465596 transitions. Word has length 37 [2021-05-03 16:09:56,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:09:56,860 INFO L480 AbstractCegarLoop]: Abstraction has 125208 states and 465596 transitions. [2021-05-03 16:09:56,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:09:56,861 INFO L276 IsEmpty]: Start isEmpty. Operand 125208 states and 465596 transitions. [2021-05-03 16:09:57,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 16:09:57,086 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:09:57,086 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:09:57,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:09:57,288 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:09:57,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:09:57,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1764133243, now seen corresponding path program 78 times [2021-05-03 16:09:57,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:09:57,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483194450] [2021-05-03 16:09:57,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:09:57,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:09:57,794 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-05-03 16:09:57,941 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-05-03 16:09:58,109 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-05-03 16:09:58,280 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-05-03 16:09:58,568 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:09:58,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483194450] [2021-05-03 16:09:58,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386557503] [2021-05-03 16:09:58,569 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 [2021-05-03 16:09:58,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 16:09:58,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:09:58,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-03 16:09:58,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:09:58,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:09:58,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:09:58,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:09:58,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:09:58,973 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:42 [2021-05-03 16:09:59,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:09:59,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2021-05-03 16:09:59,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:09:59,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:09:59,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:09:59,252 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:64 [2021-05-03 16:09:59,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 43 [2021-05-03 16:09:59,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:09:59,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:09:59,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:09:59,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:70, output treesize:73 [2021-05-03 16:10:00,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2021-05-03 16:10:00,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:10:00,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:10:00,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:10:00,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:76, output treesize:49 [2021-05-03 16:10:00,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:10:00,396 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 46 [2021-05-03 16:10:00,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:10:00,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:10:00,462 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:10:00,462 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 31 treesize of output 43 [2021-05-03 16:10:00,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 16:10:00,987 WARN L205 SmtUtils]: Spent 517.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-05-03 16:10:00,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:10:00,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:10:00,997 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:60, output treesize:37 [2021-05-03 16:10:01,254 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:10:01,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:10:01,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-05-03 16:10:01,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525457531] [2021-05-03 16:10:01,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 16:10:01,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:10:01,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 16:10:01,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-05-03 16:10:01,255 INFO L87 Difference]: Start difference. First operand 125208 states and 465596 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:10:02,126 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2021-05-03 16:10:02,514 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 28 [2021-05-03 16:10:02,995 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 37 [2021-05-03 16:10:03,531 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 42 [2021-05-03 16:10:03,880 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-05-03 16:10:04,293 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 32 [2021-05-03 16:10:04,630 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 37 [2021-05-03 16:10:04,841 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 40 [2021-05-03 16:10:05,316 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 45 [2021-05-03 16:10:05,770 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2021-05-03 16:10:05,949 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-03 16:10:06,403 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-05-03 16:10:06,895 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-05-03 16:10:07,163 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-05-03 16:10:07,891 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-05-03 16:10:09,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:10:09,906 INFO L93 Difference]: Finished difference Result 191152 states and 707156 transitions. [2021-05-03 16:10:09,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 16:10:09,908 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-03 16:10:09,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:10:10,669 INFO L225 Difference]: With dead ends: 191152 [2021-05-03 16:10:10,670 INFO L226 Difference]: Without dead ends: 191085 [2021-05-03 16:10:10,670 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 6412.0ms TimeCoverageRelationStatistics Valid=324, Invalid=2432, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 16:10:10,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191085 states. [2021-05-03 16:10:14,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191085 to 125248. [2021-05-03 16:10:14,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125248 states, 125247 states have (on average 3.718572101527382) internal successors, (465740), 125247 states have internal predecessors, (465740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:10:14,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125248 states to 125248 states and 465740 transitions. [2021-05-03 16:10:14,837 INFO L78 Accepts]: Start accepts. Automaton has 125248 states and 465740 transitions. Word has length 37 [2021-05-03 16:10:14,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:10:14,837 INFO L480 AbstractCegarLoop]: Abstraction has 125248 states and 465740 transitions. [2021-05-03 16:10:14,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:10:14,838 INFO L276 IsEmpty]: Start isEmpty. Operand 125248 states and 465740 transitions. [2021-05-03 16:10:15,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 16:10:15,069 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:10:15,069 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:10:15,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-05-03 16:10:15,271 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:10:15,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:10:15,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1412038761, now seen corresponding path program 79 times [2021-05-03 16:10:15,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:10:15,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421634960] [2021-05-03 16:10:15,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:10:15,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:10:16,182 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-05-03 16:10:16,314 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-05-03 16:10:16,448 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-05-03 16:10:16,605 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-05-03 16:10:16,746 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-05-03 16:10:16,881 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-05-03 16:10:17,047 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-05-03 16:10:17,370 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:10:17,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421634960] [2021-05-03 16:10:17,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358385591] [2021-05-03 16:10:17,370 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 [2021-05-03 16:10:17,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:10:17,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-03 16:10:17,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:10:17,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-05-03 16:10:17,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:10:17,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:10:17,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:10:17,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:50 [2021-05-03 16:10:17,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:17,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-05-03 16:10:17,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:10:17,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:10:17,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:10:17,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:72, output treesize:71 [2021-05-03 16:10:17,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:17,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:17,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:17,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 55 [2021-05-03 16:10:17,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:10:17,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:10:17,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:10:17,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:78, output treesize:73 [2021-05-03 16:10:18,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:18,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:18,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:18,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:10:18,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:18,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:10:18,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 43 [2021-05-03 16:10:18,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:10:18,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:10:18,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:18,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:18,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:18,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:10:18,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:18,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:10:18,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 31 [2021-05-03 16:10:18,184 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:10:18,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:10:18,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:10:18,203 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:26 [2021-05-03 16:10:18,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-05-03 16:10:18,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:10:18,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:10:18,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:10:18,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:5 [2021-05-03 16:10:18,341 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:10:18,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:10:18,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-05-03 16:10:18,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043273524] [2021-05-03 16:10:18,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 16:10:18,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:10:18,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 16:10:18,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-05-03 16:10:18,342 INFO L87 Difference]: Start difference. First operand 125248 states and 465740 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:10:19,862 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2021-05-03 16:10:20,150 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2021-05-03 16:10:20,331 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-05-03 16:10:20,518 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-03 16:10:20,872 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 33 [2021-05-03 16:10:21,335 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 41 [2021-05-03 16:10:21,582 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 47 [2021-05-03 16:10:22,030 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 55 [2021-05-03 16:10:22,506 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-05-03 16:10:23,125 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-05-03 16:10:23,816 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-05-03 16:10:24,375 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-05-03 16:10:27,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:10:27,313 INFO L93 Difference]: Finished difference Result 194173 states and 717129 transitions. [2021-05-03 16:10:27,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 16:10:27,316 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-03 16:10:27,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:10:28,096 INFO L225 Difference]: With dead ends: 194173 [2021-05-03 16:10:28,096 INFO L226 Difference]: Without dead ends: 193988 [2021-05-03 16:10:28,096 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 5627.1ms TimeCoverageRelationStatistics Valid=373, Invalid=1979, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 16:10:28,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193988 states. [2021-05-03 16:10:31,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193988 to 125379. [2021-05-03 16:10:31,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125379 states, 125378 states have (on average 3.7181004641962705) internal successors, (466168), 125378 states have internal predecessors, (466168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:10:33,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125379 states to 125379 states and 466168 transitions. [2021-05-03 16:10:33,013 INFO L78 Accepts]: Start accepts. Automaton has 125379 states and 466168 transitions. Word has length 37 [2021-05-03 16:10:33,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:10:33,013 INFO L480 AbstractCegarLoop]: Abstraction has 125379 states and 466168 transitions. [2021-05-03 16:10:33,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:10:33,013 INFO L276 IsEmpty]: Start isEmpty. Operand 125379 states and 466168 transitions. [2021-05-03 16:10:33,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 16:10:33,277 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:10:33,277 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:10:33,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:10:33,478 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:10:33,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:10:33,478 INFO L82 PathProgramCache]: Analyzing trace with hash -537673117, now seen corresponding path program 80 times [2021-05-03 16:10:33,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:10:33,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538145761] [2021-05-03 16:10:33,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:10:33,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:10:33,872 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-05-03 16:10:34,044 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-05-03 16:10:34,238 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-05-03 16:10:34,630 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-05-03 16:10:35,077 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:10:35,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538145761] [2021-05-03 16:10:35,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328986877] [2021-05-03 16:10:35,077 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 [2021-05-03 16:10:35,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:10:35,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:10:35,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-03 16:10:35,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:10:35,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:10:35,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:10:35,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:10:35,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:10:35,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:52 [2021-05-03 16:10:35,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:35,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-05-03 16:10:35,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:10:35,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:10:35,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:10:35,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:69 [2021-05-03 16:10:35,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:35,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:35,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:35,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-05-03 16:10:35,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:10:35,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:10:35,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:10:35,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:82, output treesize:81 [2021-05-03 16:10:36,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:36,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:36,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:10:36,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:36,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:10:36,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-05-03 16:10:36,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:10:36,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:10:36,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:36,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:36,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:10:36,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:36,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:10:36,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2021-05-03 16:10:36,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:10:36,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:10:36,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:10:36,264 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:76, output treesize:25 [2021-05-03 16:10:36,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-05-03 16:10:36,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:10:36,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:10:36,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:10:36,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-05-03 16:10:36,561 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:10:36,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:10:36,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-05-03 16:10:36,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608755150] [2021-05-03 16:10:36,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 16:10:36,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:10:36,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 16:10:36,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-05-03 16:10:36,562 INFO L87 Difference]: Start difference. First operand 125379 states and 466168 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:10:36,868 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2021-05-03 16:10:37,770 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 31 [2021-05-03 16:10:38,208 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 41 [2021-05-03 16:10:38,885 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 50 [2021-05-03 16:10:39,333 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-05-03 16:10:39,666 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2021-05-03 16:10:40,388 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 36 [2021-05-03 16:10:40,974 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 41 [2021-05-03 16:10:41,330 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 47 [2021-05-03 16:10:42,446 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 55 [2021-05-03 16:10:43,010 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-05-03 16:10:43,608 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-05-03 16:10:44,467 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-05-03 16:10:45,249 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-05-03 16:10:48,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:10:48,544 INFO L93 Difference]: Finished difference Result 192212 states and 710594 transitions. [2021-05-03 16:10:48,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 16:10:48,558 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-03 16:10:48,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:10:49,385 INFO L225 Difference]: With dead ends: 192212 [2021-05-03 16:10:49,386 INFO L226 Difference]: Without dead ends: 192006 [2021-05-03 16:10:49,386 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 6934.4ms TimeCoverageRelationStatistics Valid=310, Invalid=1852, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 16:10:49,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192006 states. [2021-05-03 16:10:52,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192006 to 125371. [2021-05-03 16:10:53,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125371 states, 125370 states have (on average 3.7180505703118767) internal successors, (466132), 125370 states have internal predecessors, (466132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:10:53,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125371 states to 125371 states and 466132 transitions. [2021-05-03 16:10:53,683 INFO L78 Accepts]: Start accepts. Automaton has 125371 states and 466132 transitions. Word has length 37 [2021-05-03 16:10:53,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:10:53,683 INFO L480 AbstractCegarLoop]: Abstraction has 125371 states and 466132 transitions. [2021-05-03 16:10:53,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:10:53,683 INFO L276 IsEmpty]: Start isEmpty. Operand 125371 states and 466132 transitions. [2021-05-03 16:10:53,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 16:10:53,925 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:10:53,925 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:10:54,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-05-03 16:10:54,125 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:10:54,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:10:54,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1216033563, now seen corresponding path program 81 times [2021-05-03 16:10:54,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:10:54,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32355180] [2021-05-03 16:10:54,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:10:54,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:10:54,511 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-03 16:10:54,695 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-05-03 16:10:54,878 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-05-03 16:10:55,072 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-05-03 16:10:55,302 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-05-03 16:10:55,702 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:10:55,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32355180] [2021-05-03 16:10:55,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822866504] [2021-05-03 16:10:55,702 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 [2021-05-03 16:10:55,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 16:10:55,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:10:55,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-03 16:10:55,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:10:55,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:10:55,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:10:55,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:10:55,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:10:55,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:55 [2021-05-03 16:10:56,325 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-05-03 16:10:56,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2021-05-03 16:10:56,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:10:56,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:10:56,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:10:56,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:88, output treesize:87 [2021-05-03 16:10:56,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:56,707 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-05-03 16:10:56,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 65 [2021-05-03 16:10:56,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:10:56,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:10:56,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:10:56,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:107, output treesize:105 [2021-05-03 16:10:58,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:58,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:58,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:58,229 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-05-03 16:10:58,230 INFO L354 Elim1Store]: treesize reduction 24, result has 69.6 percent of original size [2021-05-03 16:10:58,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 71 treesize of output 103 [2021-05-03 16:10:58,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:10:58,630 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2021-05-03 16:10:58,632 INFO L628 ElimStorePlain]: treesize reduction 133, result has 61.0 percent of original size [2021-05-03 16:10:58,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:10:58,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:122, output treesize:271 [2021-05-03 16:10:59,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-05-03 16:10:59,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:10:59,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:59,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:59,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:59,506 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-05-03 16:10:59,507 INFO L354 Elim1Store]: treesize reduction 10, result has 75.6 percent of original size [2021-05-03 16:10:59,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 55 treesize of output 67 [2021-05-03 16:10:59,519 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 16:10:59,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:59,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:10:59,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:59,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:59,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:10:59,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:10:59,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:10:59,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2021-05-03 16:10:59,579 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:10:59,592 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 16:10:59,597 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:10:59,606 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 16:10:59,612 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:10:59,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:59,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:10:59,629 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2021-05-03 16:10:59,634 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:10:59,859 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-05-03 16:10:59,860 INFO L628 ElimStorePlain]: treesize reduction 50, result has 63.8 percent of original size [2021-05-03 16:10:59,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-05-03 16:10:59,886 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:10:59,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:59,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:10:59,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:11:00,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:11:00,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 59 [2021-05-03 16:11:00,075 INFO L550 ElimStorePlain]: Start of recursive call 9: 3 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-05-03 16:11:00,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-05-03 16:11:00,089 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:11:00,245 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 24 [2021-05-03 16:11:00,247 INFO L628 ElimStorePlain]: treesize reduction 29, result has 58.0 percent of original size [2021-05-03 16:11:00,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-03 16:11:00,254 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:334, output treesize:36 [2021-05-03 16:11:00,568 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:11:00,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:11:00,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-03 16:11:00,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236049868] [2021-05-03 16:11:00,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:11:00,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:11:00,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:11:00,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:11:00,569 INFO L87 Difference]: Start difference. First operand 125371 states and 466132 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:11:01,181 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2021-05-03 16:11:01,833 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-03 16:11:03,008 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 45 [2021-05-03 16:11:03,821 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2021-05-03 16:11:04,312 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-05-03 16:11:04,641 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 37 [2021-05-03 16:11:05,301 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 42 [2021-05-03 16:11:05,689 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 45 [2021-05-03 16:11:06,020 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 48 [2021-05-03 16:11:06,550 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 72 [2021-05-03 16:11:07,207 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 53 [2021-05-03 16:11:07,771 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 37 [2021-05-03 16:11:08,036 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 40 [2021-05-03 16:11:08,537 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 82 [2021-05-03 16:11:08,916 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 45 [2021-05-03 16:11:09,224 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-03 16:11:09,536 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 16:11:10,475 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 91 [2021-05-03 16:11:10,695 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-03 16:11:11,668 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2021-05-03 16:11:12,496 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 82 [2021-05-03 16:11:12,843 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-05-03 16:11:13,333 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-05-03 16:11:16,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:11:16,512 INFO L93 Difference]: Finished difference Result 228731 states and 844791 transitions. [2021-05-03 16:11:16,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-03 16:11:16,530 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-03 16:11:16,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:11:17,657 INFO L225 Difference]: With dead ends: 228731 [2021-05-03 16:11:17,658 INFO L226 Difference]: Without dead ends: 228657 [2021-05-03 16:11:17,658 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 12068.8ms TimeCoverageRelationStatistics Valid=636, Invalid=3396, Unknown=0, NotChecked=0, Total=4032 [2021-05-03 16:11:17,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228657 states. [2021-05-03 16:11:21,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228657 to 125366. [2021-05-03 16:11:21,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125366 states, 125365 states have (on average 3.7181749292067163) internal successors, (466129), 125365 states have internal predecessors, (466129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:11:22,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125366 states to 125366 states and 466129 transitions. [2021-05-03 16:11:22,217 INFO L78 Accepts]: Start accepts. Automaton has 125366 states and 466129 transitions. Word has length 37 [2021-05-03 16:11:22,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:11:22,217 INFO L480 AbstractCegarLoop]: Abstraction has 125366 states and 466129 transitions. [2021-05-03 16:11:22,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:11:22,217 INFO L276 IsEmpty]: Start isEmpty. Operand 125366 states and 466129 transitions. [2021-05-03 16:11:22,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 16:11:22,411 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:11:22,411 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:11:22,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-05-03 16:11:22,612 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:11:22,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:11:22,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1445860719, now seen corresponding path program 82 times [2021-05-03 16:11:22,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:11:22,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379814376] [2021-05-03 16:11:22,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:11:22,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:11:22,837 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-05-03 16:11:23,187 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2021-05-03 16:11:23,326 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-05-03 16:11:23,790 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:11:23,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379814376] [2021-05-03 16:11:23,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418126476] [2021-05-03 16:11:23,790 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 [2021-05-03 16:11:23,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:11:23,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:11:23,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-03 16:11:23,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:11:24,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-05-03 16:11:24,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:11:24,815 WARN L205 SmtUtils]: Spent 703.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 16:11:24,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:11:24,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:11:24,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:50 [2021-05-03 16:11:25,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-05-03 16:11:25,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:11:25,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:11:25,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:11:25,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:56 [2021-05-03 16:11:25,657 INFO L446 ElimStorePlain]: Different costs {0=[A, B], 3=[v_C_129]} [2021-05-03 16:11:25,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 47 [2021-05-03 16:11:25,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:11:25,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:11:25,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-05-03 16:11:25,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:11:25,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:11:25,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:11:25,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:11:25,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2021-05-03 16:11:25,755 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:11:25,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:11:25,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:11:25,786 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:76, output treesize:29 [2021-05-03 16:11:25,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-05-03 16:11:25,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:11:25,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:11:25,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:11:25,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-05-03 16:11:26,039 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:11:26,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:11:26,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-05-03 16:11:26,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510246432] [2021-05-03 16:11:26,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 16:11:26,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:11:26,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 16:11:26,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-03 16:11:26,040 INFO L87 Difference]: Start difference. First operand 125366 states and 466129 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:11:26,889 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-05-03 16:11:30,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:11:30,036 INFO L93 Difference]: Finished difference Result 125847 states and 467537 transitions. [2021-05-03 16:11:30,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 16:11:30,040 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-03 16:11:30,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:11:30,560 INFO L225 Difference]: With dead ends: 125847 [2021-05-03 16:11:30,560 INFO L226 Difference]: Without dead ends: 125762 [2021-05-03 16:11:30,560 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 2166.7ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:11:31,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125762 states. [2021-05-03 16:11:33,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125762 to 125438. [2021-05-03 16:11:33,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125438 states, 125437 states have (on average 3.717794590112965) internal successors, (466349), 125437 states have internal predecessors, (466349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:11:34,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125438 states to 125438 states and 466349 transitions. [2021-05-03 16:11:34,075 INFO L78 Accepts]: Start accepts. Automaton has 125438 states and 466349 transitions. Word has length 37 [2021-05-03 16:11:34,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:11:34,075 INFO L480 AbstractCegarLoop]: Abstraction has 125438 states and 466349 transitions. [2021-05-03 16:11:34,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:11:34,076 INFO L276 IsEmpty]: Start isEmpty. Operand 125438 states and 466349 transitions. [2021-05-03 16:11:34,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 16:11:34,290 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:11:34,290 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:11:34,490 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-05-03 16:11:34,490 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:11:34,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:11:34,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1665880423, now seen corresponding path program 83 times [2021-05-03 16:11:34,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:11:34,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718082526] [2021-05-03 16:11:34,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:11:34,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:11:35,292 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-05-03 16:11:35,456 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-05-03 16:11:35,778 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2021-05-03 16:11:35,926 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-05-03 16:11:36,377 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:11:36,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718082526] [2021-05-03 16:11:36,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620200864] [2021-05-03 16:11:36,378 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 [2021-05-03 16:11:36,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:11:36,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:11:36,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 16:11:36,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:11:36,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:11:36,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:11:36,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:11:36,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:11:36,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:42 [2021-05-03 16:11:37,403 INFO L354 Elim1Store]: treesize reduction 31, result has 29.5 percent of original size [2021-05-03 16:11:37,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 42 [2021-05-03 16:11:37,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:11:37,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:11:37,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:11:37,489 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:64, output treesize:67 [2021-05-03 16:11:37,903 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-05-03 16:11:37,945 INFO L446 ElimStorePlain]: Different costs {0=[A, B], 3=[v_C_132]} [2021-05-03 16:11:37,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2021-05-03 16:11:37,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:11:38,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:11:38,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-05-03 16:11:38,016 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:11:38,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:11:38,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:11:38,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2021-05-03 16:11:38,057 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:11:38,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:11:38,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:11:38,093 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:72, output treesize:30 [2021-05-03 16:11:38,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:11:38,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:11:38,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:11:38,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:11:38,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:11:38,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:11:38,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 15 [2021-05-03 16:11:38,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:11:38,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:11:38,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:11:38,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:5 [2021-05-03 16:11:38,549 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:11:38,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:11:38,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-03 16:11:38,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299525367] [2021-05-03 16:11:38,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 16:11:38,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:11:38,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 16:11:38,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-05-03 16:11:38,551 INFO L87 Difference]: Start difference. First operand 125438 states and 466349 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:11:39,493 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-05-03 16:11:40,755 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-05-03 16:11:42,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:11:42,856 INFO L93 Difference]: Finished difference Result 125973 states and 467911 transitions. [2021-05-03 16:11:42,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 16:11:42,859 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-03 16:11:42,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:11:43,783 INFO L225 Difference]: With dead ends: 125973 [2021-05-03 16:11:43,784 INFO L226 Difference]: Without dead ends: 125822 [2021-05-03 16:11:43,784 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 3226.2ms TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-05-03 16:11:43,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125822 states. [2021-05-03 16:11:46,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125822 to 125422. [2021-05-03 16:11:46,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125422 states, 125421 states have (on average 3.7178542668293186) internal successors, (466297), 125421 states have internal predecessors, (466297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:11:47,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125422 states to 125422 states and 466297 transitions. [2021-05-03 16:11:47,119 INFO L78 Accepts]: Start accepts. Automaton has 125422 states and 466297 transitions. Word has length 37 [2021-05-03 16:11:47,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:11:47,119 INFO L480 AbstractCegarLoop]: Abstraction has 125422 states and 466297 transitions. [2021-05-03 16:11:47,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:11:47,119 INFO L276 IsEmpty]: Start isEmpty. Operand 125422 states and 466297 transitions. [2021-05-03 16:11:48,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 16:11:48,101 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:11:48,101 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:11:48,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-05-03 16:11:48,317 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:11:48,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:11:48,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1598291623, now seen corresponding path program 84 times [2021-05-03 16:11:48,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:11:48,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510896162] [2021-05-03 16:11:48,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:11:48,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:11:48,723 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-05-03 16:11:49,083 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:11:49,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510896162] [2021-05-03 16:11:49,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454964834] [2021-05-03 16:11:49,084 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 [2021-05-03 16:11:49,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:11:49,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:11:49,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-03 16:11:49,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:11:49,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-05-03 16:11:49,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:11:49,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:11:49,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:11:49,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:50 [2021-05-03 16:11:49,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:11:49,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:11:49,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:11:49,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:11:49,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:11:49,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:67 [2021-05-03 16:11:50,193 INFO L446 ElimStorePlain]: Different costs {3=[v_C_135], 12=[A, B]} [2021-05-03 16:11:50,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:11:50,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:11:50,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:11:50,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 57 [2021-05-03 16:11:50,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:11:50,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:11:50,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:11:50,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:11:50,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:11:50,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:11:50,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:11:50,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:11:50,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 42 [2021-05-03 16:11:50,283 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:11:50,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:11:50,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:11:50,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:11:50,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:11:50,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:11:50,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:11:50,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:11:50,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2021-05-03 16:11:50,345 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:11:50,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:11:50,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:11:50,369 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:90, output treesize:38 [2021-05-03 16:11:50,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-05-03 16:11:50,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:11:50,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:11:50,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:11:50,528 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:12 [2021-05-03 16:11:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:11:50,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:11:50,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 23 [2021-05-03 16:11:50,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951546172] [2021-05-03 16:11:50,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 16:11:50,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:11:50,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 16:11:50,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-05-03 16:11:50,672 INFO L87 Difference]: Start difference. First operand 125422 states and 466297 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:11:51,386 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-05-03 16:11:54,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:11:54,378 INFO L93 Difference]: Finished difference Result 126260 states and 468740 transitions. [2021-05-03 16:11:54,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:11:54,382 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-03 16:11:54,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:11:54,927 INFO L225 Difference]: With dead ends: 126260 [2021-05-03 16:11:54,927 INFO L226 Difference]: Without dead ends: 126210 [2021-05-03 16:11:54,928 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1871.9ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-05-03 16:11:55,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126210 states. [2021-05-03 16:11:57,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126210 to 125520. [2021-05-03 16:11:57,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125520 states, 125519 states have (on average 3.717437200742517) internal successors, (466609), 125519 states have internal predecessors, (466609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:11:58,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125520 states to 125520 states and 466609 transitions. [2021-05-03 16:11:58,870 INFO L78 Accepts]: Start accepts. Automaton has 125520 states and 466609 transitions. Word has length 37 [2021-05-03 16:11:58,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:11:58,870 INFO L480 AbstractCegarLoop]: Abstraction has 125520 states and 466609 transitions. [2021-05-03 16:11:58,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:11:58,870 INFO L276 IsEmpty]: Start isEmpty. Operand 125520 states and 466609 transitions. [2021-05-03 16:11:59,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 16:11:59,105 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:11:59,105 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:11:59,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-05-03 16:11:59,305 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:11:59,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:11:59,306 INFO L82 PathProgramCache]: Analyzing trace with hash -415065469, now seen corresponding path program 85 times [2021-05-03 16:11:59,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:11:59,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510657503] [2021-05-03 16:11:59,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:11:59,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:11:59,849 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-05-03 16:12:00,034 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-05-03 16:12:00,453 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:12:00,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510657503] [2021-05-03 16:12:00,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998792441] [2021-05-03 16:12:00,453 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 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 [2021-05-03 16:12:00,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:12:00,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-03 16:12:00,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:12:00,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:12:00,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:12:00,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:12:00,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:12:00,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-05-03 16:12:01,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:01,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:12:01,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:12:01,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:12:01,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:12:01,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:64 [2021-05-03 16:12:01,515 INFO L446 ElimStorePlain]: Different costs {3=[v_C_138], 12=[A, B]} [2021-05-03 16:12:01,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:01,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:01,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:01,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 55 [2021-05-03 16:12:01,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:12:01,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:12:01,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:01,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:01,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:12:01,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:01,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:12:01,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 42 [2021-05-03 16:12:01,620 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:12:01,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:12:01,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:01,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:01,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:12:01,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:01,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:12:01,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2021-05-03 16:12:01,669 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:12:01,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:12:01,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:12:01,692 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:81, output treesize:29 [2021-05-03 16:12:01,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-05-03 16:12:01,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:12:01,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:12:01,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:12:01,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:5 [2021-05-03 16:12:02,071 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:12:02,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:12:02,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-05-03 16:12:02,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410813931] [2021-05-03 16:12:02,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 16:12:02,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:12:02,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 16:12:02,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-05-03 16:12:02,072 INFO L87 Difference]: Start difference. First operand 125520 states and 466609 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:12:02,835 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-05-03 16:12:06,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:12:06,606 INFO L93 Difference]: Finished difference Result 126115 states and 468365 transitions. [2021-05-03 16:12:06,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 16:12:06,610 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-03 16:12:06,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:12:07,202 INFO L225 Difference]: With dead ends: 126115 [2021-05-03 16:12:07,202 INFO L226 Difference]: Without dead ends: 126090 [2021-05-03 16:12:07,202 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 2135.3ms TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:12:07,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126090 states. [2021-05-03 16:12:10,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126090 to 125532. [2021-05-03 16:12:10,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125532 states, 125531 states have (on average 3.717527941305335) internal successors, (466665), 125531 states have internal predecessors, (466665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:12:11,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125532 states to 125532 states and 466665 transitions. [2021-05-03 16:12:11,252 INFO L78 Accepts]: Start accepts. Automaton has 125532 states and 466665 transitions. Word has length 37 [2021-05-03 16:12:11,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:12:11,252 INFO L480 AbstractCegarLoop]: Abstraction has 125532 states and 466665 transitions. [2021-05-03 16:12:11,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:12:11,252 INFO L276 IsEmpty]: Start isEmpty. Operand 125532 states and 466665 transitions. [2021-05-03 16:12:11,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 16:12:11,509 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:12:11,509 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:12:11,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-05-03 16:12:11,710 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:12:11,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:12:11,710 INFO L82 PathProgramCache]: Analyzing trace with hash 2137898311, now seen corresponding path program 86 times [2021-05-03 16:12:11,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:12:11,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971046795] [2021-05-03 16:12:11,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:12:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:12:11,975 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-05-03 16:12:12,205 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-05-03 16:12:12,770 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:12:12,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971046795] [2021-05-03 16:12:12,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556407878] [2021-05-03 16:12:12,770 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 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 [2021-05-03 16:12:12,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:12:12,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:12:12,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-03 16:12:12,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:12:13,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:12:13,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:12:13,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:12:13,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:12:13,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:55 [2021-05-03 16:12:13,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:13,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:12:13,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:12:14,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:12:14,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:12:14,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:79, output treesize:78 [2021-05-03 16:12:14,300 INFO L446 ElimStorePlain]: Different costs {3=[v_C_141], 6=[A, B]} [2021-05-03 16:12:14,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:14,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:14,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:14,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2021-05-03 16:12:14,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:12:14,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:12:14,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:14,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:14,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:14,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:14,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:14,456 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:12:14,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 53 [2021-05-03 16:12:14,462 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 16:12:14,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:12:14,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:14,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:14,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:14,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:14,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:14,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:12:14,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 46 [2021-05-03 16:12:14,573 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:12:14,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:12:14,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:12:14,628 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:91, output treesize:46 [2021-05-03 16:12:15,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:12:15,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 12 treesize of output 23 [2021-05-03 16:12:15,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:12:15,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:12:15,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 39 [2021-05-03 16:12:15,425 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 16:12:15,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:12:15,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:12:15,512 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:29 [2021-05-03 16:12:16,458 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:12:16,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:12:16,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 16:12:16,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310141179] [2021-05-03 16:12:16,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 16:12:16,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:12:16,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 16:12:16,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2021-05-03 16:12:16,459 INFO L87 Difference]: Start difference. First operand 125532 states and 466665 transitions. Second operand has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:12:16,990 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-05-03 16:12:17,375 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-05-03 16:12:18,064 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2021-05-03 16:12:18,620 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-05-03 16:12:19,900 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 16:12:22,206 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-05-03 16:12:23,714 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2021-05-03 16:12:25,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:12:25,063 INFO L93 Difference]: Finished difference Result 127660 states and 473111 transitions. [2021-05-03 16:12:25,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 16:12:25,068 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-03 16:12:25,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:12:26,145 INFO L225 Difference]: With dead ends: 127660 [2021-05-03 16:12:26,145 INFO L226 Difference]: Without dead ends: 127610 [2021-05-03 16:12:26,145 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 5134.3ms TimeCoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 16:12:26,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127610 states. [2021-05-03 16:12:28,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127610 to 125565. [2021-05-03 16:12:29,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125565 states, 125564 states have (on average 3.717522538307158) internal successors, (466787), 125564 states have internal predecessors, (466787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:12:30,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125565 states to 125565 states and 466787 transitions. [2021-05-03 16:12:30,304 INFO L78 Accepts]: Start accepts. Automaton has 125565 states and 466787 transitions. Word has length 37 [2021-05-03 16:12:30,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:12:30,304 INFO L480 AbstractCegarLoop]: Abstraction has 125565 states and 466787 transitions. [2021-05-03 16:12:30,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:12:30,304 INFO L276 IsEmpty]: Start isEmpty. Operand 125565 states and 466787 transitions. [2021-05-03 16:12:30,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 16:12:30,578 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:12:30,578 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:12:30,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:12:30,778 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:12:30,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:12:30,779 INFO L82 PathProgramCache]: Analyzing trace with hash 2229561, now seen corresponding path program 87 times [2021-05-03 16:12:30,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:12:30,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590256355] [2021-05-03 16:12:30,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:12:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:12:31,036 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-05-03 16:12:31,368 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-05-03 16:12:31,526 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-05-03 16:12:31,748 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-05-03 16:12:31,943 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-05-03 16:12:32,144 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-05-03 16:12:32,337 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:12:32,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590256355] [2021-05-03 16:12:32,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088609532] [2021-05-03 16:12:32,338 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 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 [2021-05-03 16:12:32,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 16:12:32,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:12:32,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-03 16:12:32,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:12:32,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 16:12:32,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:12:32,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:12:32,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:12:32,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-05-03 16:12:33,072 INFO L354 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2021-05-03 16:12:33,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:12:33,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:12:33,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:12:33,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:12:33,129 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:64, output treesize:63 [2021-05-03 16:12:34,016 INFO L446 ElimStorePlain]: Different costs {6=[v_C_144], 10=[A, B]} [2021-05-03 16:12:34,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:34,141 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 19 [2021-05-03 16:12:34,142 INFO L354 Elim1Store]: treesize reduction 62, result has 31.9 percent of original size [2021-05-03 16:12:34,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 74 [2021-05-03 16:12:34,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:12:34,264 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-03 16:12:34,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:12:34,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:34,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:34,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:34,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:34,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:34,440 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2021-05-03 16:12:34,441 INFO L354 Elim1Store]: treesize reduction 18, result has 63.3 percent of original size [2021-05-03 16:12:34,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 68 [2021-05-03 16:12:34,455 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 16:12:34,758 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2021-05-03 16:12:34,760 INFO L628 ElimStorePlain]: treesize reduction 58, result has 61.8 percent of original size [2021-05-03 16:12:34,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:34,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:34,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:34,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:34,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:34,934 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 16:12:34,936 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:12:34,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 78 [2021-05-03 16:12:34,998 INFO L550 ElimStorePlain]: Start of recursive call 4: 3 dim-0 vars, End of recursive call: and 4 xjuncts. [2021-05-03 16:12:35,261 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2021-05-03 16:12:35,263 INFO L628 ElimStorePlain]: treesize reduction 79, result has 47.0 percent of original size [2021-05-03 16:12:35,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:12:35,319 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:99, output treesize:80 [2021-05-03 16:12:37,526 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-05-03 16:12:37,628 INFO L446 ElimStorePlain]: Different costs {3=[C], 10=[v_prenex_4]} [2021-05-03 16:12:37,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:37,699 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:12:37,699 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 25 [2021-05-03 16:12:37,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:12:37,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:12:37,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:37,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:12:37,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:37,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:37,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:12:37,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:12:37,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-05-03 16:12:37,831 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:12:37,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:12:37,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:12:37,905 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:76, output treesize:24 [2021-05-03 16:12:38,161 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:12:38,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:12:38,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 25 [2021-05-03 16:12:38,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940241966] [2021-05-03 16:12:38,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 16:12:38,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:12:38,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 16:12:38,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-05-03 16:12:38,163 INFO L87 Difference]: Start difference. First operand 125565 states and 466787 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:12:39,322 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-05-03 16:12:40,997 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-05-03 16:12:41,327 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-05-03 16:12:41,787 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2021-05-03 16:12:42,783 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-05-03 16:12:43,777 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-05-03 16:12:45,082 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-05-03 16:12:45,504 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-05-03 16:12:47,001 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-05-03 16:12:48,424 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-05-03 16:12:49,107 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-05-03 16:12:50,069 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 16:12:50,928 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-05-03 16:12:52,482 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-05-03 16:12:53,072 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-05-03 16:12:53,591 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-05-03 16:12:54,083 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-05-03 16:12:55,353 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 79 [2021-05-03 16:12:55,872 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2021-05-03 16:12:56,433 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-05-03 16:12:56,916 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-05-03 16:12:58,642 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 76 [2021-05-03 16:12:59,192 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-05-03 16:12:59,970 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-05-03 16:13:01,521 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-05-03 16:13:02,688 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-05-03 16:13:03,203 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-05-03 16:13:04,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:13:04,133 INFO L93 Difference]: Finished difference Result 127878 states and 473732 transitions. [2021-05-03 16:13:04,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-03 16:13:04,138 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-03 16:13:04,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:13:04,736 INFO L225 Difference]: With dead ends: 127878 [2021-05-03 16:13:04,736 INFO L226 Difference]: Without dead ends: 127497 [2021-05-03 16:13:04,737 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 15171.4ms TimeCoverageRelationStatistics Valid=395, Invalid=4161, Unknown=0, NotChecked=0, Total=4556 [2021-05-03 16:13:04,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127497 states. [2021-05-03 16:13:08,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127497 to 125660. [2021-05-03 16:13:08,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125660 states, 125659 states have (on average 3.7171392419166156) internal successors, (467092), 125659 states have internal predecessors, (467092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:13:08,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125660 states to 125660 states and 467092 transitions. [2021-05-03 16:13:08,832 INFO L78 Accepts]: Start accepts. Automaton has 125660 states and 467092 transitions. Word has length 37 [2021-05-03 16:13:08,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:13:08,832 INFO L480 AbstractCegarLoop]: Abstraction has 125660 states and 467092 transitions. [2021-05-03 16:13:08,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:13:08,833 INFO L276 IsEmpty]: Start isEmpty. Operand 125660 states and 467092 transitions. [2021-05-03 16:13:09,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 16:13:09,037 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:13:09,037 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:13:09,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:13:09,249 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:13:09,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:13:09,250 INFO L82 PathProgramCache]: Analyzing trace with hash -2142634043, now seen corresponding path program 88 times [2021-05-03 16:13:09,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:13:09,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25050442] [2021-05-03 16:13:09,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:13:09,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:13:09,542 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-05-03 16:13:09,725 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-05-03 16:13:09,924 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-05-03 16:13:10,316 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-05-03 16:13:10,622 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-05-03 16:13:10,977 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-05-03 16:13:11,997 WARN L205 SmtUtils]: Spent 944.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-05-03 16:13:12,244 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-05-03 16:13:12,586 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:13:12,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25050442] [2021-05-03 16:13:12,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339949398] [2021-05-03 16:13:12,586 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 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 [2021-05-03 16:13:12,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:13:12,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:13:12,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-03 16:13:12,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:13:13,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-05-03 16:13:13,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:13:13,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:13:13,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:13:13,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:54 [2021-05-03 16:13:13,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:13:13,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-05-03 16:13:13,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:13:13,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:13:13,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:13:13,383 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:72, output treesize:71 [2021-05-03 16:13:14,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:13:14,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:13:14,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:13:14,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 57 [2021-05-03 16:13:14,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:13:14,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:13:14,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:13:14,128 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:88, output treesize:87 [2021-05-03 16:13:14,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-05-03 16:13:14,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:13:14,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:13:14,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:13:14,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:71, output treesize:47 [2021-05-03 16:13:14,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-05-03 16:13:14,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:13:14,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:13:14,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-05-03 16:13:14,724 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:13:14,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:13:14,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:13:14,735 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:7 [2021-05-03 16:13:14,882 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:13:14,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:13:14,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-05-03 16:13:14,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813789918] [2021-05-03 16:13:14,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 16:13:14,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:13:14,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 16:13:14,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-05-03 16:13:14,883 INFO L87 Difference]: Start difference. First operand 125660 states and 467092 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:13:15,666 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-05-03 16:13:17,001 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 29 [2021-05-03 16:13:18,163 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-05-03 16:13:18,990 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-05-03 16:13:19,524 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 39 [2021-05-03 16:13:19,937 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-05-03 16:13:20,244 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 37 [2021-05-03 16:13:21,006 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2021-05-03 16:13:21,450 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-05-03 16:13:21,842 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2021-05-03 16:13:22,307 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 16:13:23,498 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-03 16:13:23,875 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-05-03 16:13:24,421 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-05-03 16:13:25,841 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-03 16:13:29,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:13:29,578 INFO L93 Difference]: Finished difference Result 193886 states and 716177 transitions. [2021-05-03 16:13:29,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 16:13:29,583 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-03 16:13:29,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:13:30,513 INFO L225 Difference]: With dead ends: 193886 [2021-05-03 16:13:30,513 INFO L226 Difference]: Without dead ends: 193823 [2021-05-03 16:13:30,514 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 10068.4ms TimeCoverageRelationStatistics Valid=305, Invalid=1951, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 16:13:30,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193823 states. [2021-05-03 16:13:34,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193823 to 126356. [2021-05-03 16:13:34,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126356 states, 126355 states have (on average 3.7174310474456886) internal successors, (469716), 126355 states have internal predecessors, (469716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:13:36,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126356 states to 126356 states and 469716 transitions. [2021-05-03 16:13:36,276 INFO L78 Accepts]: Start accepts. Automaton has 126356 states and 469716 transitions. Word has length 37 [2021-05-03 16:13:36,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:13:36,276 INFO L480 AbstractCegarLoop]: Abstraction has 126356 states and 469716 transitions. [2021-05-03 16:13:36,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:13:36,277 INFO L276 IsEmpty]: Start isEmpty. Operand 126356 states and 469716 transitions. [2021-05-03 16:13:36,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 16:13:36,648 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:13:36,648 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:13:36,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:13:36,873 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:13:36,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:13:36,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1033537961, now seen corresponding path program 89 times [2021-05-03 16:13:36,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:13:36,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705674223] [2021-05-03 16:13:36,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:13:36,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:13:37,081 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-05-03 16:13:37,275 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-05-03 16:13:37,483 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-05-03 16:13:37,816 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-05-03 16:13:38,102 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-05-03 16:13:38,471 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-05-03 16:13:38,795 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-05-03 16:13:39,080 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-05-03 16:13:39,501 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:13:39,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705674223] [2021-05-03 16:13:39,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417020292] [2021-05-03 16:13:39,501 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 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 [2021-05-03 16:13:39,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 16:13:39,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:13:39,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-03 16:13:39,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:13:40,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-05-03 16:13:40,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:13:40,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:13:40,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:13:40,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:67, output treesize:66 [2021-05-03 16:13:40,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:13:40,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-05-03 16:13:40,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:13:40,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:13:40,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:13:40,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:87, output treesize:86 [2021-05-03 16:13:41,432 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-05-03 16:13:42,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:13:42,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:13:42,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:13:42,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:13:42,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:13:42,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:13:42,208 INFO L354 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2021-05-03 16:13:42,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 59 treesize of output 70 [2021-05-03 16:13:42,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:13:42,323 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-03 16:13:42,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:13:42,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-05-03 16:13:42,347 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:112, output treesize:111 [2021-05-03 16:13:42,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:13:42,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:13:42,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:13:42,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 194 treesize of output 112 [2021-05-03 16:13:42,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:13:43,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:13:43,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:13:43,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:13:43,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:13:43,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 78 [2021-05-03 16:13:43,076 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:13:43,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:13:43,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-05-03 16:13:43,159 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:292, output treesize:106 [2021-05-03 16:13:59,713 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 16:13:59,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:13:59,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:13:59,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:13:59,978 INFO L244 Elim1Store]: Index analysis took 155 ms [2021-05-03 16:14:00,505 WARN L205 SmtUtils]: Spent 524.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-03 16:14:00,506 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:14:00,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 27 treesize of output 87 [2021-05-03 16:14:01,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-05-03 16:14:03,690 WARN L205 SmtUtils]: Spent 2.67 s on a formula simplification. DAG size of input: 199 DAG size of output: 36 [2021-05-03 16:14:03,692 INFO L628 ElimStorePlain]: treesize reduction 926, result has 5.8 percent of original size [2021-05-03 16:14:03,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:14:03,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:48, output treesize:33 [2021-05-03 16:14:04,279 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-05-03 16:14:04,588 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:14:04,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:14:04,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-05-03 16:14:04,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425637228] [2021-05-03 16:14:04,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:14:04,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:14:04,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:14:04,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=658, Unknown=7, NotChecked=0, Total=756 [2021-05-03 16:14:04,589 INFO L87 Difference]: Start difference. First operand 126356 states and 469716 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:14:05,068 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2021-05-03 16:14:05,913 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-05-03 16:14:09,578 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-05-03 16:14:10,219 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-03 16:14:11,014 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-05-03 16:14:12,117 WARN L205 SmtUtils]: Spent 737.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-05-03 16:14:13,984 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-03 16:14:15,165 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 37 [2021-05-03 16:14:18,731 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 16:14:20,108 WARN L205 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2021-05-03 16:14:21,210 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-03 16:14:22,549 WARN L205 SmtUtils]: Spent 734.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-05-03 16:14:24,122 WARN L205 SmtUtils]: Spent 769.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2021-05-03 16:14:25,031 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 39 [2021-05-03 16:14:25,866 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 40 [2021-05-03 16:14:26,765 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-05-03 16:14:27,534 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 16:14:36,867 WARN L205 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2021-05-03 16:14:38,322 WARN L205 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-05-03 16:14:39,616 WARN L205 SmtUtils]: Spent 991.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-05-03 16:14:48,172 WARN L205 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 45 [2021-05-03 16:14:59,188 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 16:15:00,039 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-03 16:15:12,283 WARN L205 SmtUtils]: Spent 838.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-05-03 16:15:17,638 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-03 16:15:26,544 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 16:15:29,939 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-03 16:15:40,631 WARN L205 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 51 [2021-05-03 16:15:45,023 WARN L205 SmtUtils]: Spent 811.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 40 [2021-05-03 16:15:47,982 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 16:16:00,201 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 5 Received shutdown request... [2021-05-03 16:16:07,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 16:16:07,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-05-03 16:16:07,953 WARN L545 AbstractCegarLoop]: Verification canceled [2021-05-03 16:16:07,957 WARN L224 ceAbstractionStarter]: Timeout [2021-05-03 16:16:07,957 INFO L202 PluginConnector]: Adding new model three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 04:16:07 BasicIcfg [2021-05-03 16:16:07,957 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 16:16:07,958 INFO L168 Benchmark]: Toolchain (without parser) took 729855.14 ms. Allocated memory was 367.0 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 346.7 MB in the beginning and 10.6 GB in the end (delta: -10.3 GB). Peak memory consumption was 5.4 GB. Max. memory is 16.0 GB. [2021-05-03 16:16:07,958 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.32 ms. Allocated memory is still 367.0 MB. Free memory was 347.9 MB in the beginning and 347.8 MB in the end (delta: 71.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 16:16:07,958 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.32 ms. Allocated memory is still 367.0 MB. Free memory was 346.6 MB in the beginning and 345.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 16:16:07,958 INFO L168 Benchmark]: Boogie Preprocessor took 35.67 ms. Allocated memory is still 367.0 MB. Free memory was 345.2 MB in the beginning and 344.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-03 16:16:07,958 INFO L168 Benchmark]: RCFGBuilder took 421.60 ms. Allocated memory is still 367.0 MB. Free memory was 344.1 MB in the beginning and 330.1 MB in the end (delta: 14.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-05-03 16:16:07,958 INFO L168 Benchmark]: TraceAbstraction took 729350.83 ms. Allocated memory was 367.0 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 329.6 MB in the beginning and 10.6 GB in the end (delta: -10.3 GB). Peak memory consumption was 5.4 GB. Max. memory is 16.0 GB. [2021-05-03 16:16:07,958 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.32 ms. Allocated memory is still 367.0 MB. Free memory was 347.9 MB in the beginning and 347.8 MB in the end (delta: 71.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 33.32 ms. Allocated memory is still 367.0 MB. Free memory was 346.6 MB in the beginning and 345.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 35.67 ms. Allocated memory is still 367.0 MB. Free memory was 345.2 MB in the beginning and 344.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 421.60 ms. Allocated memory is still 367.0 MB. Free memory was 344.1 MB in the beginning and 330.1 MB in the end (delta: 14.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 729350.83 ms. Allocated memory was 367.0 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 329.6 MB in the beginning and 10.6 GB in the end (delta: -10.3 GB). Peak memory consumption was 5.4 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 71). Cancelled while BasicCegarLoop was constructing difference of abstraction (126356states) and FLOYD_HOARE automaton (currently 40 states, 28 states before enhancement),while ReachableStatesComputation was computing reachable states (3925 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 729185.2ms, OverallIterations: 97, TraceHistogramMax: 3, EmptinessCheckTime: 10785.7ms, AutomataDifference: 405508.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 46.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4109 SDtfs, 19497 SDslu, 32902 SDs, 0 SdLazy, 76839 SolverSat, 3749 SolverUnsat, 27 SolverUnknown, 0 SolverNotchecked, 126780.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5171 GetRequests, 2328 SyntacticMatches, 114 SemanticMatches, 2729 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34237 ImplicationChecksByTransitivity, 216505.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=155997occurred in iteration=66, InterpolantAutomatonStates: 2254, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 159575.6ms AutomataMinimizationTime, 96 MinimizatonAttempts, 983822 StatesRemovedByMinimization, 96 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 512.7ms SsaConstructionTime, 2761.8ms SatisfiabilityAnalysisTime, 128778.6ms InterpolantComputationTime, 5842 NumberOfCodeBlocks, 5833 NumberOfCodeBlocksAsserted, 355 NumberOfCheckSat, 5654 ConstructedInterpolants, 111 QuantifiedInterpolants, 128955 SizeOfPredicates, 488 NumberOfNonLiveVariables, 8271 ConjunctsInSsa, 2559 ConjunctsInUnsatCore, 188 InterpolantComputations, 6 PerfectInterpolantSequences, 530/3219 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown